import EuroLinux squid-4.15-7.module+el8.9.0+21530+59b09a5b.10

2024-03-22 07:44:27 +00:00 · 2024-03-22 07:44:27 +00:00 · 06eaaacb31
commit 06eaaacb31
parent b5d3c5c00b
18 changed files with 2059 additions and 4417 deletions
--- a/SOURCES/0001-Break-long-store_client-call-chains-with-async-calls.patch
+++ b/SOURCES/0001-Break-long-store_client-call-chains-with-async-calls.patch
@ -1,599 +0,0 @@
-From 4896d07bf753683a3dbba4210384b0d862ff2d11 Mon Sep 17 00:00:00 2001
-From: Eduard Bagdasaryan <eduard.bagdasaryan@measurement-factory.com>
-Date: Thu, 7 Dec 2023 16:47:08 +0000
-Subject: [PATCH 1/7] Break long store_client call chains with async calls 
- (#1056)
-
-The store_client class design created very long call chains spanning
-Squid-client and Squid-server processing and multiple transactions.
-These call chains also create ideal conditions for dangerous recursive
-relationships between communicating classes (a.k.a. "reentrancy" among
-Squid developers). For example, storeClientCopy() enters store_client
-and triggers disk I/O that triggers invokeHandlers() that re-enters the
-same store_client object and starts competing with the original
-storeClientCopy() processing state.
-
-The official code prevented the worst recursion cases with three(!)
-boolean flags and time-based events abused to break some of the call
-chains, but that approach did not solve all of the problems while also
-losing transaction context information across time-based events.
-
-This change effectively makes STCB storeClientCopy() callbacks
-asynchronous, eliminating the need for time-based events and one of the
-flags. It shortens many call chains and preserves transaction context.
-The remaining problems can and should be eliminated by converting
-store_client into AsyncJob, but those changes deserve a dedicated PR.
-
-store_client orchestrates cooperation of multiple asynchronous players:
-
-* Sink: A Store client requests a STCB callback via a
-  storeClientCopy()/copy() call. A set _callback.callback_handler
-  implies that the client is waiting for this callback.
-
-* Source1: A Store disk reading subsystem activated by the storeRead()
-  call "spontaneously" delivers response bytes via storeClientRead*()
-  callbacks. The disk_io_pending flag implies waiting for them.
-
-* Source2: Store memory subsystem activated by storeClientListAdd()
-  "spontaneously" delivers response bytes via invokeHandlers().
-
-* Source3: Store disk subsystem activated by storeSwapInStart()
-  "spontaneously" notifies of EOF/error by calling noteSwapInDone().
-
-* Source4: A store_client object owner may delete the object by
-  "spontaneously" calling storeUnregister(). The official code was
-  converting this event into an error-notifying callback.
-
-We continue to answer each storeClientCopy() request with the first
-available information even though several SourceN calls are possible
-while we are waiting to complete the STCB callback. The StoreIOBuffer
-API and STCB recipients do not support data+error/eof combinations, and
-future code will move this wait to the main event loop anyway. This
-first-available approach means that the creation of the notifier call
-effectively ends answer processing -- store_client just waits for that
-call to fire so that it can relay the answer to still-synchronous STCB.
-When STCB itself becomes asynchronous, this logic will continue to work.
-
-Also stopped calling STCB from storeUnregister(). Conceptually, the
-storeUnregister() and storeClientCopy() callers ought to represent the
-same get-content-from-Store task; there should be no need to notify that
-task about what it is doing. Technically, analysis of STCB callbacks
-showed that many such notifications would be dangerous (if they are or
-become reachable). At the time of the storeUnregister() call, the STCB
-callbacks are usually unset (e.g., when storeUnregister() is called from
-the destructor, after that object has finished copying -- a very common
-case) or do not do anything (useful).
-
-Also removed callback_data from the Callback::pending() condition. It is
-conceptually wrong to require non-nil callback parameter, and it is
-never cleared separately from the callback_handler data member anyway.
-
-Also hid copyInto into the private store_client section to make sure it
-is not modified while we are waiting to complete the STCB callback. This
-move required adding a couple of read-only wrapper methods like
-bytesWanted() and noteSwapInDone().
-
-Also simplified error/EOF/bytes handling on copy()-STCB path using
-dedicated methods (e.g., store_client::callback() API is no longer
-mixing EOF and error signals).
-
-Modified-by: Alex Burmashev <alexander.burmashev@oracle.com>
-Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
---
- src/MemObject.cc               |   6 +-
- src/StoreClient.h              |  64 ++++++++++--
- src/store_client.cc            | 177 ++++++++++++++++++++++-----------
- src/store_swapin.cc            |   2 +-
- src/tests/stub_store_client.cc |   5 +-
- 5 files changed, 186 insertions(+), 68 deletions(-)
-
-diff --git a/src/MemObject.cc b/src/MemObject.cc
-index df7791f..4ba63cc 100644
--- a/src/MemObject.cc
-+++ b/src/MemObject.cc
-@@ -196,8 +196,8 @@ struct LowestMemReader : public unary_function<store_client, void> {
-     LowestMemReader(int64_t seed):current(seed) {}
- 
-     void operator() (store_client const &x) {
-        if (x.memReaderHasLowerOffset(current))
-            current = x.copyInto.offset;
-+        if (x.getType() == STORE_MEM_CLIENT)
-+            current = std::min(current, x.readOffset());
-     }
- 
-     int64_t current;
-@@ -492,7 +492,7 @@ MemObject::mostBytesAllowed() const
- 
- #endif
- 
-        j = sc->delayId.bytesWanted(0, sc->copyInto.length);
-+        j = sc->bytesWanted();
- 
-         if (j > jmax) {
-             jmax = j;
-diff --git a/src/StoreClient.h b/src/StoreClient.h
-index 65472d8..457844a 100644
--- a/src/StoreClient.h
-+++ b/src/StoreClient.h
-@@ -12,6 +12,7 @@
- #include "dlink.h"
- #include "StoreIOBuffer.h"
- #include "StoreIOState.h"
-+#include "base/AsyncCall.h"
- 
- typedef void STCB(void *, StoreIOBuffer);   /* store callback */
- 
-@@ -39,14 +40,32 @@ class store_client
- public:
-     store_client(StoreEntry *);
-     ~store_client();
-    bool memReaderHasLowerOffset(int64_t) const;
-+
-+    /// An offset into the stored response bytes, including the HTTP response
-+    /// headers (if any). Note that this offset does not include Store entry
-+    /// metadata, because it is not a part of the stored response.
-+    /// \retval 0 means the client wants to read HTTP response headers.
-+    /// \retval +N the response byte that the client wants to read next.
-+    /// \retval -N should not occur.
-+    // TODO: Callers do not expect negative offset. Verify that the return
-+    // value cannot be negative and convert to unsigned in this case.
-+    int64_t readOffset() const { return copyInto.offset; }
-+
-     int getType() const;
-    void fail();
-    void callback(ssize_t len, bool error = false);
-+
-+    /// React to the end of reading the response from disk. There will be no
-+    /// more readHeader() and readBody() callbacks for the current storeRead()
-+    /// swapin after this notification.
-+    void noteSwapInDone(bool error);
-+
-     void doCopy (StoreEntry *e);
-     void readHeader(const char *buf, ssize_t len);
-     void readBody(const char *buf, ssize_t len);
-+
-+    /// Request StoreIOBuffer-described response data via an asynchronous STCB
-+    /// callback. At most one outstanding request is allowed per store_client.
-     void copy(StoreEntry *, StoreIOBuffer, STCB *, void *);
-+
-     void dumpStats(MemBuf * output, int clientNumber) const;
- 
-     int64_t cmp_offset;
-@@ -59,19 +78,29 @@ public:
-     StoreIOState::Pointer swapin_sio;
- 
-     struct {
-+        /// whether we are expecting a response to be swapped in from disk
-+        /// (i.e. whether async storeRead() is currently in progress)
-+        // TODO: a better name reflecting the 'in' scope of the flag
-         bool disk_io_pending;
-+
-+        /// whether the store_client::doCopy()-initiated STCB sequence is
-+        /// currently in progress
-         bool store_copying;
-        bool copy_event_pending;
-     } flags;
- 
- #if USE_DELAY_POOLS
-     DelayId delayId;
-+
-+    /// The maximum number of bytes the Store client can read/copy next without
-+    /// overflowing its buffer and without violating delay pool limits. Store
-+    /// I/O is not rate-limited, but we assume that the same number of bytes may
-+    /// be read from the Squid-to-server connection that may be rate-limited.
-+    int bytesWanted() const;
-+
-     void setDelayId(DelayId delay_id);
- #endif
- 
-     dlink_node node;
-    /* Below here is private - do no alter outside storeClient calls */
-    StoreIOBuffer copyInto;
- 
- private:
-     bool moreToSend() const;
-@@ -83,9 +112,25 @@ private:
-     bool startSwapin();
-     bool unpackHeader(char const *buf, ssize_t len);
- 
-+    void fail();
-+    void callback(ssize_t);
-+    void noteCopiedBytes(size_t);
-+    void noteEof();
-+    void noteNews();
-+    void finishCallback();
-+    static void FinishCallback(store_client *);
-+
-     int type;
-     bool object_ok;
- 
-+    /// Storage and metadata associated with the current copy() request. Ought
-+    /// to be ignored when not answering a copy() request.
-+    StoreIOBuffer copyInto;
-+
-+    /// The number of bytes loaded from Store into copyInto while answering the
-+    /// current copy() request. Ought to be ignored when not answering.
-+    size_t copiedSize;
-+
-     /* Until we finish stuffing code into store_client */
- 
- public:
-@@ -94,9 +139,16 @@ public:
-         Callback ():callback_handler(NULL), callback_data(NULL) {}
- 
-         Callback (STCB *, void *);
-+
-+        /// Whether the copy() answer is needed/expected (by the client) and has
-+        /// not been computed (by us). False during (asynchronous) answer
-+        /// delivery to the STCB callback_handler.
-         bool pending() const;
-         STCB *callback_handler;
-         void *callback_data;
-+
-+        /// a scheduled asynchronous finishCallback() call (or nil)
-+        AsyncCall::Pointer notifier;
-     } _callback;
- };
- 
-diff --git a/src/store_client.cc b/src/store_client.cc
-index 1b54f04..207c96b 100644
--- a/src/store_client.cc
-+++ b/src/store_client.cc
-@@ -9,6 +9,7 @@
- /* DEBUG: section 90    Storage Manager Client-Side Interface */
- 
- #include "squid.h"
-+#include "base/AsyncCbdataCalls.h"
- #include "event.h"
- #include "globals.h"
- #include "HttpReply.h"
-@@ -39,17 +40,10 @@
- static StoreIOState::STRCB storeClientReadBody;
- static StoreIOState::STRCB storeClientReadHeader;
- static void storeClientCopy2(StoreEntry * e, store_client * sc);
-static EVH storeClientCopyEvent;
- static bool CheckQuickAbortIsReasonable(StoreEntry * entry);
- 
- CBDATA_CLASS_INIT(store_client);
- 
-bool
-store_client::memReaderHasLowerOffset(int64_t anOffset) const
-{
-    return getType() == STORE_MEM_CLIENT && copyInto.offset < anOffset;
-}
-
- int
- store_client::getType() const
- {
-@@ -104,22 +98,41 @@ storeClientListAdd(StoreEntry * e, void *data)
-     return sc;
- }
- 
-+/// schedules asynchronous STCB call to relay disk or memory read results
-+/// \param outcome an error signal (if negative), an EOF signal (if zero), or the number of bytes read
-+void
-+store_client::callback(const ssize_t outcome)
-+{
-+    if (outcome > 0)
-+        return noteCopiedBytes(outcome);
-+
-+    if (outcome < 0)
-+        return fail();
-+
-+    noteEof();
-+}
-+/// finishCallback() wrapper; TODO: Add NullaryMemFunT for non-jobs.
- void
-store_client::callback(ssize_t sz, bool error)
-+store_client::FinishCallback(store_client * const sc)
- {
-    size_t bSz = 0;
-+    sc->finishCallback();
-+}
- 
-    if (sz >= 0 && !error)
-        bSz = sz;
-+/// finishes a copy()-STCB sequence by synchronously calling STCB
-+void
-+store_client::finishCallback()
-+{
-+    Assure(_callback.callback_handler);
-+    Assure(_callback.notifier);
- 
-    StoreIOBuffer result(bSz, 0 ,copyInto.data);
-+    // callers are not ready to handle a content+error combination
-+    Assure(object_ok || !copiedSize);
- 
-    if (sz < 0 || error)
-        result.flags.error = 1;
-+    StoreIOBuffer result(copiedSize, copyInto.offset, copyInto.data);
-+    result.flags.error = object_ok ? 0 : 1;
-+    copiedSize = 0;
- 
-    result.offset = cmp_offset;
-    assert(_callback.pending());
-    cmp_offset = copyInto.offset + bSz;
-+    cmp_offset = result.offset + result.length;
-     STCB *temphandler = _callback.callback_handler;
-     void *cbdata = _callback.callback_data;
-     _callback = Callback(NULL, NULL);
-@@ -131,18 +144,24 @@ store_client::callback(ssize_t sz, bool error)
-     cbdataReferenceDone(cbdata);
- }
- 
-static void
-storeClientCopyEvent(void *data)
-+/// schedules asynchronous STCB call to relay a successful disk or memory read
-+/// \param bytesCopied the number of response bytes copied into copyInto
-+void
-+store_client::noteCopiedBytes(const size_t bytesCopied)
- {
-    store_client *sc = (store_client *)data;
-    debugs(90, 3, "storeClientCopyEvent: Running");
-    assert (sc->flags.copy_event_pending);
-    sc->flags.copy_event_pending = false;
-
-    if (!sc->_callback.pending())
-        return;
-+    debugs(90, 5, bytesCopied);
-+    Assure(bytesCopied > 0);
-+    Assure(!copiedSize);
-+    copiedSize = bytesCopied;
-+    noteNews();
-+}
- 
-    storeClientCopy2(sc->entry, sc);
-+void
-+store_client::noteEof()
-+{
-+    debugs(90, 5, copiedSize);
-+    Assure(!copiedSize);
-+    noteNews();
- }
- 
- store_client::store_client(StoreEntry *e) :
-@@ -152,11 +171,11 @@ store_client::store_client(StoreEntry *e) :
- #endif
-     entry(e),
-     type(e->storeClientType()),
-    object_ok(true)
-+    object_ok(true),
-+    copiedSize(0)
- {
-     flags.disk_io_pending = false;
-     flags.store_copying = false;
-    flags.copy_event_pending = false;
-     ++ entry->refcount;
- 
-     if (getType() == STORE_DISK_CLIENT) {
-@@ -272,17 +291,11 @@ static void
- storeClientCopy2(StoreEntry * e, store_client * sc)
- {
-     /* reentrancy not allowed  - note this could lead to
-     * dropped events
-+     * dropped notifications about response data availability
-      */
- 
-    if (sc->flags.copy_event_pending) {
-        return;
-    }
-
-     if (sc->flags.store_copying) {
-        sc->flags.copy_event_pending = true;
-        debugs(90, 3, "storeClientCopy2: Queueing storeClientCopyEvent()");
-        eventAdd("storeClientCopyEvent", storeClientCopyEvent, sc, 0.0, 0);
-+        debugs(90, 3, "prevented recursive copying for " << *e);
-         return;
-     }
- 
-@@ -295,21 +308,16 @@ storeClientCopy2(StoreEntry * e, store_client * sc)
-      * if the peer aborts, we want to give the client(s)
-      * everything we got before the abort condition occurred.
-      */
-    /* Warning: doCopy may indirectly free itself in callbacks,
-     * hence the lock to keep it active for the duration of
-     * this function
-     * XXX: Locking does not prevent calling sc destructor (it only prevents
-     * freeing sc memory) so sc may become invalid from C++ p.o.v.
-     */
-    CbcPointer<store_client> tmpLock = sc;
-    assert (!sc->flags.store_copying);
-     sc->doCopy(e);
-    assert(!sc->flags.store_copying);
- }
- 
- void
- store_client::doCopy(StoreEntry *anEntry)
- {
-+    Assure(_callback.pending());
-+    Assure(!flags.disk_io_pending);
-+    Assure(!flags.store_copying);
-+
-     assert (anEntry == entry);
-     flags.store_copying = true;
-     MemObject *mem = entry->mem_obj;
-@@ -321,7 +329,7 @@ store_client::doCopy(StoreEntry *anEntry)
-     if (!moreToSend()) {
-         /* There is no more to send! */
-         debugs(33, 3, HERE << "There is no more to send!");
-        callback(0);
-+        noteEof();
-         flags.store_copying = false;
-         return;
-     }
-@@ -382,6 +390,16 @@ store_client::startSwapin()
-     }
- }
- 
-+void
-+store_client::noteSwapInDone(const bool error)
-+{
-+    Assure(_callback.pending());
-+    if (error)
-+        fail();
-+    else
-+        noteEof();
-+}
-+
- void
- store_client::scheduleRead()
- {
-@@ -421,7 +439,7 @@ store_client::scheduleMemRead()
-     /* What the client wants is in memory */
-     /* Old style */
-     debugs(90, 3, "store_client::doCopy: Copying normal from memory");
-    size_t sz = entry->mem_obj->data_hdr.copy(copyInto);
-+    const auto sz = entry->mem_obj->data_hdr.copy(copyInto); // may be <= 0 per copy() API
-     callback(sz);
-     flags.store_copying = false;
- }
-@@ -493,7 +511,19 @@ store_client::readBody(const char *, ssize_t len)
- void
- store_client::fail()
- {
-+    debugs(90, 3, (object_ok ? "once" : "again"));
-+    if (!object_ok)
-+        return; // we failed earlier; nothing to do now
-+
-     object_ok = false;
-+
-+    noteNews();
-+}
-+
-+/// if necessary and possible, informs the Store reader about copy() result
-+void
-+store_client::noteNews()
-+{
-     /* synchronous open failures callback from the store,
-      * before startSwapin detects the failure.
-      * TODO: fix this inconsistent behaviour - probably by
-@@ -501,8 +531,20 @@ store_client::fail()
-      * not synchronous
-      */
- 
-    if (_callback.pending())
-        callback(0, true);
-+    if (!_callback.callback_handler) {
-+        debugs(90, 5, "client lost interest");
-+        return;
-+    }
-+
-+    if (_callback.notifier) {
-+        debugs(90, 5, "earlier news is being delivered by " << _callback.notifier);
-+        return;
-+    }
-+
-+    _callback.notifier = asyncCall(90, 4, "store_client::FinishCallback", cbdataDialer(store_client::FinishCallback, this));
-+    ScheduleCallHere(_callback.notifier);
-+
-+    Assure(!_callback.pending());
- }
- 
- static void
-@@ -673,10 +715,12 @@ storeUnregister(store_client * sc, StoreEntry * e, void *data)
-         ++statCounter.swap.ins;
-     }
- 
-    if (sc->_callback.pending()) {
-        /* callback with ssize = -1 to indicate unexpected termination */
-        debugs(90, 3, "store_client for " << *e << " has a callback");
-        sc->fail();
-+    if (sc->_callback.callback_handler || sc->_callback.notifier) {
-+        debugs(90, 3, "forgetting store_client callback for " << *e);
-+        // Do not notify: Callers want to stop copying and forget about this
-+        // pending copy request. Some would mishandle a notification from here.
-+        if (sc->_callback.notifier)
-+            sc->_callback.notifier->cancel("storeUnregister");
-     }
- 
- #if STORE_CLIENT_LIST_DEBUG
-@@ -684,6 +728,8 @@ storeUnregister(store_client * sc, StoreEntry * e, void *data)
- 
- #endif
- 
-+    // XXX: We might be inside sc store_client method somewhere up the call
-+    // stack. TODO: Convert store_client to AsyncJob to make destruction async.
-     delete sc;
- 
-     assert(e->locked());
-@@ -740,6 +786,16 @@ StoreEntry::invokeHandlers()
- 
-         if (sc->flags.disk_io_pending)
-             continue;
-+        if (sc->flags.store_copying)
-+            continue;
-+
-+        // XXX: If invokeHandlers() is (indirectly) called from a store_client
-+        // method, then the above three conditions may not be sufficient to
-+        // prevent us from reentering the same store_client object! This
-+        // probably does not happen in the current code, but no observed
-+        // invariant prevents this from (accidentally) happening in the future.
-+
-+        // TODO: Convert store_client into AsyncJob; make this call asynchronous
- 
-         storeClientCopy2(this, sc);
-     }
-@@ -864,8 +920,8 @@ store_client::dumpStats(MemBuf * output, int clientNumber) const
-     if (flags.store_copying)
-         output->append(" store_copying", 14);
- 
-    if (flags.copy_event_pending)
-        output->append(" copy_event_pending", 19);
-+    if (_callback.notifier)
-+        output->append(" notifying", 10);
- 
-     output->append("\n",1);
- }
-@@ -873,12 +929,19 @@ store_client::dumpStats(MemBuf * output, int clientNumber) const
- bool
- store_client::Callback::pending() const
- {
-    return callback_handler && callback_data;
-+    return callback_handler && !notifier;
- }
- 
- store_client::Callback::Callback(STCB *function, void *data) : callback_handler(function), callback_data (data) {}
- 
- #if USE_DELAY_POOLS
-+int
-+store_client::bytesWanted() const
-+{
-+    // TODO: To avoid using stale copyInto, return zero if !_callback.pending()?
-+    return delayId.bytesWanted(0, copyInto.length);
-+}
-+
- void
- store_client::setDelayId(DelayId delay_id)
- {
-diff --git a/src/store_swapin.cc b/src/store_swapin.cc
-index a05d7e3..cd32e94 100644
--- a/src/store_swapin.cc
-+++ b/src/store_swapin.cc
-@@ -56,7 +56,7 @@ storeSwapInFileClosed(void *data, int errflag, StoreIOState::Pointer)
- 
-     if (sc->_callback.pending()) {
-         assert (errflag <= 0);
-        sc->callback(0, errflag ? true : false);
-+        sc->noteSwapInDone(errflag);
-     }
- 
-     ++statCounter.swap.ins;
-diff --git a/src/tests/stub_store_client.cc b/src/tests/stub_store_client.cc
-index 2a13874..4a73863 100644
--- a/src/tests/stub_store_client.cc
-+++ b/src/tests/stub_store_client.cc
-@@ -34,7 +34,10 @@ void storeLogOpen(void) STUB
- void storeDigestInit(void) STUB
- void storeRebuildStart(void) STUB
- void storeReplSetup(void) STUB
-bool store_client::memReaderHasLowerOffset(int64_t anOffset) const STUB_RETVAL(false)
-+void store_client::noteSwapInDone(bool) STUB
-+#if USE_DELAY_POOLS
-+int store_client::bytesWanted() const STUB_RETVAL(0)
-+#endif
- void store_client::dumpStats(MemBuf * output, int clientNumber) const STUB
- int store_client::getType() const STUB_RETVAL(0)
- 
-- 
-2.39.3
-
--- a/SOURCES/0003-Bug-5309-frequent-lowestOffset-target_offset-asserti.patch
+++ b/SOURCES/0003-Bug-5309-frequent-lowestOffset-target_offset-asserti.patch
@ -1,119 +0,0 @@
-From af18cb04f07555f49daef982c8c21459bfbe388c Mon Sep 17 00:00:00 2001
-From: Alex Rousskov <rousskov@measurement-factory.com>
-Date: Thu, 23 Nov 2023 18:27:24 +0000
-Subject: [PATCH 3/7] Bug 5309: frequent "lowestOffset () <= target_offset"
- assertion (#1561)
-
-    Recent commit 122a6e3 left store_client::readOffset() unchanged but
-    should have adjusted it to match changed copyInto.offset semantics:
-    Starting with that commit, storeClientCopy() callers supply HTTP
-    response _body_ offset rather than HTTP response offset.
-....
-    This bug decreased readOffset() values (by the size of stored HTTP
-    response headers), effectively telling Store that we are not yet done
-    with some of the MemObject/mem_hdr bytes. This bug could cause slightly
-    higher transaction memory usage because the same response bytes are
-    trimmed later. This bug should not have caused any assertions.
-....
-    However, the old mem_hdr::freeDataUpto() code that uses readOffset() is
-    also broken -- the assertion in that method only "works" when
-    readOffset() returns values matching a memory node boundary. The smaller
-    values returned by buggy readOffset() triggered buggy assertions.
-....
-    This minimal fix removes the recent store_client::readOffset() bug
-    described above. We will address old mem_hdr problems separately.
-
-Modified-by: Alex Burmashev <alexander.burmashev@oracle.com>
-Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
---
- src/MemObject.cc    |  2 +-
- src/StoreClient.h   | 19 ++++++++++---------
- src/store_client.cc | 13 +++++++++++++
- 3 files changed, 24 insertions(+), 10 deletions(-)
-
-diff --git a/src/MemObject.cc b/src/MemObject.cc
-index d7aaf5e..650d3fd 100644
--- a/src/MemObject.cc
-+++ b/src/MemObject.cc
-@@ -197,7 +197,7 @@ struct LowestMemReader : public unary_function<store_client, void> {
- 
-     void operator() (store_client const &x) {
-         if (x.getType() == STORE_MEM_CLIENT)
-            current = std::min(current, x.readOffset());
-+            current = std::min(current, x.discardableHttpEnd());
-     }
- 
-     int64_t current;
-diff --git a/src/StoreClient.h b/src/StoreClient.h
-index 1d90e5a..0524776 100644
--- a/src/StoreClient.h
-+++ b/src/StoreClient.h
-@@ -54,15 +54,8 @@ public:
-     store_client(StoreEntry *);
-     ~store_client();
- 
-    /// An offset into the stored response bytes, including the HTTP response
-    /// headers (if any). Note that this offset does not include Store entry
-    /// metadata, because it is not a part of the stored response.
-    /// \retval 0 means the client wants to read HTTP response headers.
-    /// \retval +N the response byte that the client wants to read next.
-    /// \retval -N should not occur.
-    // TODO: Callers do not expect negative offset. Verify that the return
-    // value cannot be negative and convert to unsigned in this case.
-    int64_t readOffset() const { return copyInto.offset; }
-+    /// the client will not use HTTP response bytes with lower offsets (if any)
-+    auto discardableHttpEnd() const { return discardableHttpEnd_; }
- 
-     int getType() const;
- 
-@@ -156,8 +149,16 @@ private:
- 
-     /// Storage and metadata associated with the current copy() request. Ought
-     /// to be ignored when not answering a copy() request.
-+    /// * copyInto.offset is the requested HTTP response body offset;
-+    /// * copyInto.data is the client-owned, client-provided result buffer;
-+    /// * copyInto.length is the size of the .data result buffer;
-+    /// * copyInto.flags are unused by this class.
-     StoreIOBuffer copyInto;
- 
-+    // TODO: Convert to uint64_t after fixing mem_hdr::endOffset() and friends.
-+    /// \copydoc discardableHttpEnd()
-+    int64_t discardableHttpEnd_ = 0;
-+
-     /// the total number of finishCallback() calls
-     uint64_t answers;
- 
-diff --git a/src/store_client.cc b/src/store_client.cc
-index 1731c4c..383aac8 100644
--- a/src/store_client.cc
-+++ b/src/store_client.cc
-@@ -122,6 +122,16 @@ store_client::finishCallback()
-         result = parsingBuffer->packBack();
-     result.flags.error = object_ok ? 0 : 1;
- 
-+    // TODO: Move object_ok handling above into this `if` statement.
-+    if (object_ok) {
-+        // works for zero hdr_sz cases as well; see also: nextHttpReadOffset()
-+        discardableHttpEnd_ = NaturalSum<int64_t>(entry->mem().baseReply().hdr_sz, result.offset, result.length).value();
-+    } else {
-+        // object_ok is sticky, so we will not be able to use any response bytes
-+        discardableHttpEnd_ = entry->mem().endOffset();
-+    }
-+    debugs(90, 7, "with " << result << "; discardableHttpEnd_=" << discardableHttpEnd_);
-+
-     // no HTTP headers and no body bytes (but not because there was no space)
-     atEof_ = !sendingHttpHeaders() && !result.length && copyInto.length;
- 
-@@ -220,6 +230,9 @@ store_client::copy(StoreEntry * anEntry,
- 
-     parsingBuffer.emplace(copyInto);
- 
-+    discardableHttpEnd_ = nextHttpReadOffset();
-+    debugs(90, 7, "discardableHttpEnd_=" << discardableHttpEnd_);
-+
-     static bool copying (false);
-     assert (!copying);
-     copying = true;
-- 
-2.39.3
-
--- a/SOURCES/0004-Remove-mem_hdr-freeDataUpto-assertion-1562.patch
+++ b/SOURCES/0004-Remove-mem_hdr-freeDataUpto-assertion-1562.patch
@ -1,67 +0,0 @@
-From 422272d78399d5fb2fc340281611961fc7c528e7 Mon Sep 17 00:00:00 2001
-From: Alex Rousskov <rousskov@measurement-factory.com>
-Date: Thu, 23 Nov 2023 18:27:45 +0000
-Subject: [PATCH 4/7] Remove mem_hdr::freeDataUpto() assertion (#1562)
-
-        stmem.cc:98: "lowestOffset () <= target_offset"
-....
-    The assertion is conceptually wrong: The given target_offset parameter
-    may have any value; that value does not have to correlate with mem_hdr
-    state in any way. It is freeDataUpto() job to preserve nodes at or above
-    the given offset and (arguably optionally) remove nodes below it, but
-    the assertion does not actually validate that freeDataUpdo() did that.
-....
-    The old mem_hdr::freeDataUpto() assertion incorrectly assumed that,
-    after zero or more unneeded memory nodes were freed, the remaining
-    memory area never starts after the given target_offset parameter. That
-    assumption fails in at least two use cases, both using target_offset
-    values that do not belong to any existing or future mem_hdr node:
-....
-    1. target_offset is points to the left of the first node. freeDataUpto()
-       correctly keeps all memory nodes in such calls, but then asserts. For
-       example, calling freeDataUpto(0) when mem_hdr has bytes [100,199)
-       triggers this incorrect assertion.
-....
-    2. target_offset is in the gap between two nodes. For example, calling
-       freeDataUpto(2000) when mem_hdr contains two nodes: [0,1000) and
-       [3000,3003) will trigger this assertion (as happened in Bug 5309).
-       Such gaps are very common for HTTP 206 responses with a Content-Range
-       header because such responses often specify a range that does not
-       start with zero and create a gap after the node(s) with HTTP headers.
-....
-    Bugs notwithstanding, it is unlikely that relevant calls exist today,
-    but they certainly could be added, especially when freeDataUpto() stops
-    preserving the last unused node. The current "avoid change to [some
-    unidentified] part of code" hoarding excuse should not last forever.
-....
-    Prior to commit 122a6e3, Squid did not (frequently) assert in gap cases:
-    Callers first give target_offset 0 (which results in freeDataUpto()
-    doing nothing, keeping the header node(s)) and then they give
-    target_offset matching the beginning of the first body node (which
-    results in freeDataUpto() freeing the header nodes(s) and increasing
-    lowerOffset() from zero to target_offset). A bug in commit 122a6e3
-    lowered target_offset a bit, placing target_offset in the gap and
-    triggering frequent (and incorrect) assertions (Bug 5309).
-
-Modified-by: Alex Burmashev <alexander.burmashev@oracle.com>
-Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
---
- src/stmem.cc | 2 --
- 1 file changed, 2 deletions(-)
-
-diff --git a/src/stmem.cc b/src/stmem.cc
-index d117c15..b627005 100644
--- a/src/stmem.cc
-+++ b/src/stmem.cc
-@@ -95,8 +95,6 @@ mem_hdr::freeDataUpto(int64_t target_offset)
-             break;
-     }
- 
-    assert (lowestOffset () <= target_offset);
-
-     return lowestOffset ();
- }
- 
-- 
-2.39.3
-
--- a/SOURCES/0005-Backport-Add-Assure-as-a-replacement-for-problematic.patch
+++ b/SOURCES/0005-Backport-Add-Assure-as-a-replacement-for-problematic.patch
@ -1,210 +0,0 @@
-From 5df95b5923de244eaf2ddccf980d5f28d7114b1f Mon Sep 17 00:00:00 2001
-From: Alex Burmashev <alexander.burmashev@oracle.com>
-Date: Thu, 7 Dec 2023 18:01:47 +0000
-Subject: [PATCH 5/7] Backport Add Assure() as a replacement for problematic 
- Must()
-
-This is a partial backport of
-b9a1bbfbc531359a87647271a282edff9ccdd206
-b8ae064d94784934b3402e5db015246d1b1ca658
-
-Needed for CVE CVE-2023-5824 fix
-
-Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
---
- src/HttpReply.cc         |  1 +
- src/acl/Asn.cc           |  1 +
- src/base/Assure.cc       | 23 ++++++++++++++++++
- src/base/Assure.h        | 51 ++++++++++++++++++++++++++++++++++++++++
- src/base/Makefile.am     |  2 ++
- src/base/Makefile.in     |  8 +++++--
- src/client_side_reply.cc |  1 +
- 7 files changed, 85 insertions(+), 2 deletions(-)
- create mode 100644 src/base/Assure.cc
- create mode 100644 src/base/Assure.h
-
-diff --git a/src/HttpReply.cc b/src/HttpReply.cc
-index af2bd4d..df5bcef 100644
--- a/src/HttpReply.cc
-+++ b/src/HttpReply.cc
-@@ -10,6 +10,7 @@
- 
- #include "squid.h"
- #include "acl/AclSizeLimit.h"
-+#include "base/Assure.h"
- #include "acl/FilledChecklist.h"
- #include "base/EnumIterator.h"
- #include "globals.h"
-diff --git a/src/acl/Asn.cc b/src/acl/Asn.cc
-index ad450c0..bcedc82 100644
--- a/src/acl/Asn.cc
-+++ b/src/acl/Asn.cc
-@@ -17,6 +17,7 @@
- #include "acl/SourceAsn.h"
- #include "acl/Strategised.h"
- #include "base/CharacterSet.h"
-+#include "base/Assure.h"
- #include "FwdState.h"
- #include "HttpReply.h"
- #include "HttpRequest.h"
-diff --git a/src/base/Assure.cc b/src/base/Assure.cc
-new file mode 100644
-index 0000000..b09b848
--- /dev/null
-+++ b/src/base/Assure.cc
-@@ -0,0 +1,23 @@
-+/*
-+ * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
-+ *
-+ * Squid software is distributed under GPLv2+ license and includes
-+ * contributions from numerous individuals and organizations.
-+ * Please see the COPYING and CONTRIBUTORS files for details.
-+ */
-+
-+#include "squid.h"
-+#include "base/Assure.h"
-+#include "base/TextException.h"
-+#include "sbuf/Stream.h"
-+
-+[[ noreturn ]] void
-+ReportAndThrow_(const int debugLevel, const char *description, const SourceLocation &location)
-+{
-+    const TextException ex(description, location);
-+    const auto label = debugLevel <= DBG_IMPORTANT ? "ERROR: Squid BUG: " : "";
-+    // TODO: Consider also printing the number of BUGs reported so far. It would
-+    // require GC, but we could even print the number of same-location reports.
-+    debugs(0, debugLevel, label << ex);
-+    throw ex;
-+}
-diff --git a/src/base/Assure.h b/src/base/Assure.h
-new file mode 100644
-index 0000000..650c204
--- /dev/null
-+++ b/src/base/Assure.h
-@@ -0,0 +1,51 @@
-+/*
-+ * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
-+ *
-+ * Squid software is distributed under GPLv2+ license and includes
-+ * contributions from numerous individuals and organizations.
-+ * Please see the COPYING and CONTRIBUTORS files for details.
-+ */
-+
-+#ifndef SQUID_SRC_BASE_ASSURE_H
-+#define SQUID_SRC_BASE_ASSURE_H
-+
-+#include "base/Here.h"
-+
-+/// Reports the description (at the given debugging level) and throws
-+/// the corresponding exception. Reduces compiled code size of Assure() and
-+/// Must() callers. Do not call directly; use Assure() instead.
-+/// \param description explains the condition (i.e. what MUST happen)
-+[[ noreturn ]] void ReportAndThrow_(int debugLevel, const char *description, const SourceLocation &);
-+
-+/// Calls ReportAndThrow() if needed. Reduces caller code duplication.
-+/// Do not call directly; use Assure() instead.
-+/// \param description c-string explaining the condition (i.e. what MUST happen)
-+#define Assure_(debugLevel, condition, description, location) \
-+    while (!(condition)) \
-+        ReportAndThrow_((debugLevel), (description), (location))
-+
-+#if !defined(NDEBUG)
-+
-+/// Like assert() but throws an exception instead of aborting the process. Use
-+/// this macro to detect code logic mistakes (i.e. bugs) where aborting the
-+/// current AsyncJob or a similar task is unlikely to jeopardize Squid service
-+/// integrity. For example, this macro is _not_ appropriate for detecting bugs
-+/// that indicate a dangerous global state corruption which may go unnoticed by
-+/// other jobs after the current job or task is aborted.
-+#define Assure(condition) \
-+        Assure2((condition), #condition)
-+
-+/// Like Assure() but allows the caller to customize the exception message.
-+/// \param description string literal describing the condition (i.e. what MUST happen)
-+#define Assure2(condition, description) \
-+        Assure_(0, (condition), ("assurance failed: " description), Here())
-+
-+#else
-+
-+/* do-nothing implementations for NDEBUG builds */
-+#define Assure(condition) ((void)0)
-+#define Assure2(condition, description) ((void)0)
-+
-+#endif /* NDEBUG */
-+
-+#endif /* SQUID_SRC_BASE_ASSURE_H */
-diff --git a/src/base/Makefile.am b/src/base/Makefile.am
-index 9b0f4cf..c22dd0e 100644
--- a/src/base/Makefile.am
-+++ b/src/base/Makefile.am
-@@ -19,6 +19,8 @@ libbase_la_SOURCES = \
- 	AsyncJob.cc \
- 	AsyncJob.h \
- 	AsyncJobCalls.h \
-+	Assure.cc \
-+	Assure.h \
- 	ByteCounter.h \
- 	CbcPointer.h \
- 	CbDataList.h \
-diff --git a/src/base/Makefile.in b/src/base/Makefile.in
-index 90a4f5b..f43e098 100644
--- a/src/base/Makefile.in
-+++ b/src/base/Makefile.in
-@@ -163,7 +163,7 @@ CONFIG_CLEAN_FILES =
- CONFIG_CLEAN_VPATH_FILES =
- LTLIBRARIES = $(noinst_LTLIBRARIES)
- libbase_la_LIBADD =
-am_libbase_la_OBJECTS = AsyncCall.lo AsyncCallQueue.lo AsyncJob.lo \
-+am_libbase_la_OBJECTS = AsyncCall.lo AsyncCallQueue.lo AsyncJob.lo  Assure.lo \
- 	CharacterSet.lo File.lo Here.lo RegexPattern.lo \
- 	RunnersRegistry.lo TextException.lo
- libbase_la_OBJECTS = $(am_libbase_la_OBJECTS)
-@@ -187,7 +187,7 @@ DEFAULT_INCLUDES =
- depcomp = $(SHELL) $(top_srcdir)/cfgaux/depcomp
- am__maybe_remake_depfiles = depfiles
- am__depfiles_remade = ./$(DEPDIR)/AsyncCall.Plo \
-	./$(DEPDIR)/AsyncCallQueue.Plo ./$(DEPDIR)/AsyncJob.Plo \
-+	./$(DEPDIR)/AsyncCallQueue.Plo ./$(DEPDIR)/AsyncJob.Plo ./$(DEPDIR)/Assure.Plo \
- 	./$(DEPDIR)/CharacterSet.Plo ./$(DEPDIR)/File.Plo \
- 	./$(DEPDIR)/Here.Plo ./$(DEPDIR)/RegexPattern.Plo \
- 	./$(DEPDIR)/RunnersRegistry.Plo ./$(DEPDIR)/TextException.Plo
-@@ -737,6 +737,8 @@ libbase_la_SOURCES = \
- 	AsyncJob.cc \
- 	AsyncJob.h \
- 	AsyncJobCalls.h \
-+	Assure.cc \
-+	Assure.h \
- 	ByteCounter.h \
- 	CbcPointer.h \
- 	CbDataList.h \
-@@ -830,6 +832,7 @@ distclean-compile:
- @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/AsyncCall.Plo@am__quote@ # am--include-marker
- @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/AsyncCallQueue.Plo@am__quote@ # am--include-marker
- @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/AsyncJob.Plo@am__quote@ # am--include-marker
-+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/Assure.Plo@am__quote@ # am--include-marker
- @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/CharacterSet.Plo@am__quote@ # am--include-marker
- @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/File.Plo@am__quote@ # am--include-marker
- @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/Here.Plo@am__quote@ # am--include-marker
-@@ -1224,6 +1227,7 @@ maintainer-clean: maintainer-clean-am
- 		-rm -f ./$(DEPDIR)/AsyncCall.Plo
- 	-rm -f ./$(DEPDIR)/AsyncCallQueue.Plo
- 	-rm -f ./$(DEPDIR)/AsyncJob.Plo
-+	-rm -f ./$(DEPDIR)/Assure.Plo
- 	-rm -f ./$(DEPDIR)/CharacterSet.Plo
- 	-rm -f ./$(DEPDIR)/File.Plo
- 	-rm -f ./$(DEPDIR)/Here.Plo
-diff --git a/src/client_side_reply.cc b/src/client_side_reply.cc
-index 861f4b4..470f4bc 100644
--- a/src/client_side_reply.cc
-+++ b/src/client_side_reply.cc
-@@ -12,6 +12,7 @@
- #include "acl/FilledChecklist.h"
- #include "acl/Gadgets.h"
- #include "anyp/PortCfg.h"
-+#include "base/Assure.h"
- #include "client_side_reply.h"
- #include "errorpage.h"
- #include "ETag.h"
-- 
-2.39.3
-
--- a/SOURCES/0006-Backport-additional-functions-for-SquidMath.patch
+++ b/SOURCES/0006-Backport-additional-functions-for-SquidMath.patch
@ -1,200 +0,0 @@
-From c24b9507e35fa43ddb40211a50fae9d58a0381bc Mon Sep 17 00:00:00 2001
-From: Alex Burmashev <alexander.burmashev@oracle.com>
-Date: Mon, 27 Nov 2023 11:47:40 +0000
-Subject: [PATCH 6/7] Backport additional functions for SquidMath
-
-This includes some cherry-picks from
-b308d7e2ad02ae6622f380d94d2303446f5831a9 and later commits.
-
-This is needed for CVE-2023-5824 fix
-
-Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
---
- src/SquidMath.h | 164 ++++++++++++++++++++++++++++++++++++++++++++++++
- 1 file changed, 164 insertions(+)
-
-diff --git a/src/SquidMath.h b/src/SquidMath.h
-index c70acd1..e5b6e58 100644
--- a/src/SquidMath.h
-+++ b/src/SquidMath.h
-@@ -8,7 +8,11 @@
- 
- #ifndef _SQUID_SRC_SQUIDMATH_H
- #define _SQUID_SRC_SQUIDMATH_H
-+#include "base/forward.h"
-+#include "base/TypeTraits.h"
- 
-+#include <limits>
-+#include <optional>
- /* Math functions we define locally for Squid */
- namespace Math
- {
-@@ -21,5 +25,165 @@ double doubleAverage(const double, const double, int, const int);
- 
- } // namespace Math
- 
-+// If Sum() performance becomes important, consider using GCC and clang
-+// built-ins like __builtin_add_overflow() instead of manual overflow checks.
-+
-+/// detects a pair of unsigned types
-+/// reduces code duplication in declarations further below
-+template <typename T, typename U>
-+using AllUnsigned = typename std::conditional<
-+                    std::is_unsigned<T>::value && std::is_unsigned<U>::value,
-+                    std::true_type,
-+                    std::false_type
-+                    >::type;
-+
-+// TODO: Replace with std::cmp_less() after migrating to C++20.
-+/// whether integer a is less than integer b, with correct overflow handling
-+template <typename A, typename B>
-+constexpr bool
-+Less(const A a, const B b) {
-+    // The casts below make standard C++ integer conversions explicit. They
-+    // quell compiler warnings about signed/unsigned comparison. The first two
-+    // lines exclude different-sign a and b, making the casts/comparison safe.
-+    using AB = typename std::common_type<A, B>::type;
-+    return
-+        (a >= 0 && b < 0) ? false :
-+        (a < 0 && b >= 0) ? true :
-+        /* (a >= 0) == (b >= 0) */ static_cast<AB>(a) < static_cast<AB>(b);
-+}
-+
-+/// ensure that T is supported by NaturalSum() and friends
-+template<typename T>
-+constexpr void
-+AssertNaturalType()
-+{
-+    static_assert(std::numeric_limits<T>::is_bounded, "std::numeric_limits<T>::max() is meaningful");
-+    static_assert(std::numeric_limits<T>::is_exact, "no silent loss of precision");
-+    static_assert(!std::is_enum<T>::value, "no silent creation of non-enumerated values");
-+}
-+
-+// TODO: Investigate whether this optimization can be expanded to [signed] types
-+// A and B when std::numeric_limits<decltype(A(0)+B(0))>::is_modulo is true.
-+/// This IncreaseSumInternal() overload is optimized for speed.
-+/// \returns a non-overflowing sum of the two unsigned arguments (or nothing)
-+/// \prec both argument types are unsigned
-+template <typename S, typename A, typename B, std::enable_if_t<AllUnsigned<A,B>::value, int> = 0>
-+std::optional<S>
-+IncreaseSumInternal(const A a, const B b) {
-+    // paranoid: AllUnsigned<A,B> precondition established that already
-+    static_assert(std::is_unsigned<A>::value, "AllUnsigned dispatch worked for A");
-+    static_assert(std::is_unsigned<B>::value, "AllUnsigned dispatch worked for B");
-+
-+    AssertNaturalType<S>();
-+    AssertNaturalType<A>();
-+    AssertNaturalType<B>();
-+
-+    // we should only be called by IncreaseSum(); it forces integer promotion
-+    static_assert(std::is_same<A, decltype(+a)>::value, "a will not be promoted");
-+    static_assert(std::is_same<B, decltype(+b)>::value, "b will not be promoted");
-+    // and without integer promotions, a sum of unsigned integers is unsigned
-+    static_assert(std::is_unsigned<decltype(a+b)>::value, "a+b is unsigned");
-+
-+    // with integer promotions ruled out, a or b can only undergo integer
-+    // conversion to the higher rank type (A or B, we do not know which)
-+    using AB = typename std::common_type<A, B>::type;
-+    static_assert(std::is_same<AB, A>::value || std::is_same<AB, B>::value, "no unexpected conversions");
-+    static_assert(std::is_same<AB, decltype(a+b)>::value, "lossless assignment");
-+    const AB sum = a + b;
-+
-+    static_assert(std::numeric_limits<AB>::is_modulo, "we can detect overflows");
-+    // 1. modulo math: overflowed sum is smaller than any of its operands
-+    // 2. the sum may overflow S (i.e. the return base type)
-+    // We do not need Less() here because we compare promoted unsigned types.
-+    return (sum >= a && sum <= std::numeric_limits<S>::max()) ?
-+           std::optional<S>(sum) : std::optional<S>();
-+}
-+
-+/// This IncreaseSumInternal() overload supports a larger variety of types.
-+/// \returns a non-overflowing sum of the two arguments (or nothing)
-+/// \returns nothing if at least one of the arguments is negative
-+/// \prec at least one of the argument types is signed
-+template <typename S, typename A, typename B, std::enable_if_t<!AllUnsigned<A,B>::value, int> = 0>
-+std::optional<S> constexpr
-+IncreaseSumInternal(const A a, const B b) {
-+    AssertNaturalType<S>();
-+    AssertNaturalType<A>();
-+    AssertNaturalType<B>();
-+
-+    // we should only be called by IncreaseSum() that does integer promotion
-+    static_assert(std::is_same<A, decltype(+a)>::value, "a will not be promoted");
-+    static_assert(std::is_same<B, decltype(+b)>::value, "b will not be promoted");
-+
-+    return
-+        // We could support a non-under/overflowing sum of negative numbers, but
-+        // our callers use negative values specially (e.g., for do-not-use or
-+        // do-not-limit settings) and are not supposed to do math with them.
-+        (a < 0 || b < 0) ? std::optional<S>() :
-+        // To avoid undefined behavior of signed overflow, we must not compute
-+        // the raw a+b sum if it may overflow. When A is not B, a or b undergoes
-+        // (safe for non-negatives) integer conversion in these expressions, so
-+        // we do not know the resulting a+b type AB and its maximum. We must
-+        // also detect subsequent casting-to-S overflows.
-+        // Overflow condition: (a + b > maxAB) or (a + b > maxS).
-+        // A is an integer promotion of S, so maxS <= maxA <= maxAB.
-+        // Since maxS <= maxAB, it is sufficient to just check: a + b > maxS,
-+        // which is the same as the overflow-safe condition here: maxS - a < b.
-+        // Finally, (maxS - a) cannot overflow because a is not negative and
-+        // cannot underflow because a is a promotion of s: 0 <= a <= maxS.
-+        Less(std::numeric_limits<S>::max() - a, b) ? std::optional<S>() :
-+        std::optional<S>(a + b);
-+}
-+
-+/// argument pack expansion termination for IncreaseSum<S, T, Args...>()
-+template <typename S, typename T>
-+std::optional<S>
-+IncreaseSum(const S s, const T t)
-+{
-+    // Force (always safe) integer promotions now, to give std::enable_if_t<>
-+    // promoted types instead of entering IncreaseSumInternal<AllUnsigned>(s,t)
-+    // but getting a _signed_ promoted value of s or t in s + t.
-+    return IncreaseSumInternal<S>(+s, +t);
-+}
-+
-+/// \returns a non-overflowing sum of the arguments (or nothing)
-+template <typename S, typename T, typename... Args>
-+std::optional<S>
-+IncreaseSum(const S sum, const T t, const Args... args) {
-+    if (const auto head = IncreaseSum(sum, t)) {
-+        return IncreaseSum(head.value(), args...);
-+    } else {
-+        // std::optional<S>() triggers bogus -Wmaybe-uninitialized warnings in GCC v10.3
-+        return std::nullopt;
-+    }
-+}
-+
-+/// \returns an exact, non-overflowing sum of the arguments (or nothing)
-+template <typename SummationType, typename... Args>
-+std::optional<SummationType>
-+NaturalSum(const Args... args) {
-+    return IncreaseSum<SummationType>(0, args...);
-+}
-+
-+/// Safely resets the given variable to NaturalSum() of the given arguments.
-+/// If the sum overflows, resets to variable's maximum possible value.
-+/// \returns the new variable value (like an assignment operator would)
-+template <typename S, typename... Args>
-+S
-+SetToNaturalSumOrMax(S &var, const Args... args)
-+{
-+    var = NaturalSum<S>(args...).value_or(std::numeric_limits<S>::max());
-+    return var;
-+}
-+
-+/// converts a given non-negative integer into an integer of a given type
-+/// without loss of information or undefined behavior
-+template <typename Result, typename Source>
-+Result
-+NaturalCast(const Source s)
-+{
-+    return NaturalSum<Result>(s).value();
-+}
-+
-+
- #endif /* _SQUID_SRC_SQUIDMATH_H */
- 
-- 
-2.39.3
-
--- a/SOURCES/0007-Adapt-to-older-gcc-cleanup.patch
+++ b/SOURCES/0007-Adapt-to-older-gcc-cleanup.patch
@ -1,763 +0,0 @@
-From 37de4ce82f7f8906606d0625774d856ffd3a9453 Mon Sep 17 00:00:00 2001
-From: Alex Burmashev <alexander.burmashev@oracle.com>
-Date: Thu, 7 Dec 2023 20:51:39 +0000
-Subject: [PATCH] Adapt to older gcc, cleanup
-
-Fix code that is not applicable to older codebase of squidv4.
-On top do some work to adapt code to older gcc.
-most of that is std::optional to std::pair conversion
-
-Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
---
- src/HttpReply.cc           |  4 +-
- src/MemObject.h            |  3 ++
- src/MemStore.cc            |  6 +--
- src/SquidMath.h            | 27 ++++++------
- src/Store.h                |  3 ++
- src/StoreClient.h          |  2 +-
- src/acl/Asn.cc             | 14 +------
- src/base/Assure.cc         |  8 ++++
- src/client_side_reply.cc   | 64 ++++++++++++-----------------
- src/peer_digest.cc         |  1 +
- src/store/ParsingBuffer.cc | 47 ++++++++++-----------
- src/store/ParsingBuffer.h  |  2 +-
- src/store_client.cc        | 84 +++++++++++++++++---------------------
- src/urn.cc                 |  2 +-
- 14 files changed, 123 insertions(+), 144 deletions(-)
-
-diff --git a/src/HttpReply.cc b/src/HttpReply.cc
-index df5bcef..21c62c2 100644
--- a/src/HttpReply.cc
-+++ b/src/HttpReply.cc
-@@ -534,13 +534,13 @@ HttpReply::parseTerminatedPrefix(const char * const terminatedBuf, const size_t
-     const bool eof = false; // TODO: Remove after removing atEnd from HttpHeader::parse()
-     if (parse(terminatedBuf, bufSize, eof, &error)) {
-         debugs(58, 7, "success after accumulating " << bufSize << " bytes and parsing " << hdr_sz);
-        Assure(pstate == Http::Message::psParsed);
-+        Assure(pstate == psParsed);
-         Assure(hdr_sz > 0);
-         Assure(!Less(bufSize, hdr_sz)); // cannot parse more bytes than we have
-         return hdr_sz; // success
-     }
- 
-    Assure(pstate != Http::Message::psParsed);
-+    Assure(pstate != psParsed);
-     hdr_sz = 0;
- 
-     if (error) {
-diff --git a/src/MemObject.h b/src/MemObject.h
-index ba6646f..5a7590a 100644
--- a/src/MemObject.h
-+++ b/src/MemObject.h
-@@ -56,6 +56,9 @@ public:
- 
-     void write(const StoreIOBuffer &buf);
-     void unlinkRequest();
-+
-+    HttpReply &baseReply() const { return *_reply; }
-+
-     HttpReply const *getReply() const;
-     void replaceHttpReply(HttpReply *newrep);
-     void stat (MemBuf * mb) const;
-diff --git a/src/MemStore.cc b/src/MemStore.cc
-index fe7af2f..6762c4f 100644
--- a/src/MemStore.cc
-+++ b/src/MemStore.cc
-@@ -511,8 +511,8 @@ MemStore::copyFromShm(StoreEntry &e, const sfileno index, const Ipc::StoreMapAnc
-                    " from " << extra.page << '+' << prefixSize);
- 
-             // parse headers if needed; they might span multiple slices!
-            auto &reply = e.mem().adjustableBaseReply();
-            if (reply.pstate != Http::Message::psParsed) {
-+            auto &reply = e.mem().baseReply();
-+            if (reply.pstate != psParsed) {
-                 httpHeaderParsingBuffer.append(sliceBuf.data, sliceBuf.length);
-                 if (reply.parseTerminatedPrefix(httpHeaderParsingBuffer.c_str(), httpHeaderParsingBuffer.length()))
-                     httpHeaderParsingBuffer = SBuf(); // we do not need these bytes anymore
-@@ -542,7 +542,7 @@ MemStore::copyFromShm(StoreEntry &e, const sfileno index, const Ipc::StoreMapAnc
-     debugs(20, 5, "mem-loaded all " << e.mem_obj->endOffset() << '/' <<
-            anchor.basics.swap_file_sz << " bytes of " << e);
- 
-    if (e.mem().adjustableBaseReply().pstate != Http::Message::psParsed)
-+    if (e.mem().baseReply().pstate != psParsed)
-         throw TextException(ToSBuf("truncated mem-cached headers; accumulated: ", httpHeaderParsingBuffer.length()), Here());
- 
-     // from StoreEntry::complete()
-diff --git a/src/SquidMath.h b/src/SquidMath.h
-index e5b6e58..538833b 100644
--- a/src/SquidMath.h
-+++ b/src/SquidMath.h
-@@ -8,8 +8,6 @@
- 
- #ifndef _SQUID_SRC_SQUIDMATH_H
- #define _SQUID_SRC_SQUIDMATH_H
-#include "base/forward.h"
-#include "base/TypeTraits.h"
- 
- #include <limits>
- #include <optional>
-@@ -68,7 +66,7 @@ AssertNaturalType()
- /// \returns a non-overflowing sum of the two unsigned arguments (or nothing)
- /// \prec both argument types are unsigned
- template <typename S, typename A, typename B, std::enable_if_t<AllUnsigned<A,B>::value, int> = 0>
-std::optional<S>
-+std::pair<S, bool>
- IncreaseSumInternal(const A a, const B b) {
-     // paranoid: AllUnsigned<A,B> precondition established that already
-     static_assert(std::is_unsigned<A>::value, "AllUnsigned dispatch worked for A");
-@@ -96,7 +94,7 @@ IncreaseSumInternal(const A a, const B b) {
-     // 2. the sum may overflow S (i.e. the return base type)
-     // We do not need Less() here because we compare promoted unsigned types.
-     return (sum >= a && sum <= std::numeric_limits<S>::max()) ?
-           std::optional<S>(sum) : std::optional<S>();
-+           std::make_pair(sum, true) : std::make_pair(S(), false);
- }
- 
- /// This IncreaseSumInternal() overload supports a larger variety of types.
-@@ -104,7 +102,7 @@ IncreaseSumInternal(const A a, const B b) {
- /// \returns nothing if at least one of the arguments is negative
- /// \prec at least one of the argument types is signed
- template <typename S, typename A, typename B, std::enable_if_t<!AllUnsigned<A,B>::value, int> = 0>
-std::optional<S> constexpr
-+std::pair<S, bool>
- IncreaseSumInternal(const A a, const B b) {
-     AssertNaturalType<S>();
-     AssertNaturalType<A>();
-@@ -118,7 +116,7 @@ IncreaseSumInternal(const A a, const B b) {
-         // We could support a non-under/overflowing sum of negative numbers, but
-         // our callers use negative values specially (e.g., for do-not-use or
-         // do-not-limit settings) and are not supposed to do math with them.
-        (a < 0 || b < 0) ? std::optional<S>() :
-+        (a < 0 || b < 0) ? std::make_pair(S(), false) :
-         // To avoid undefined behavior of signed overflow, we must not compute
-         // the raw a+b sum if it may overflow. When A is not B, a or b undergoes
-         // (safe for non-negatives) integer conversion in these expressions, so
-@@ -130,13 +128,13 @@ IncreaseSumInternal(const A a, const B b) {
-         // which is the same as the overflow-safe condition here: maxS - a < b.
-         // Finally, (maxS - a) cannot overflow because a is not negative and
-         // cannot underflow because a is a promotion of s: 0 <= a <= maxS.
-        Less(std::numeric_limits<S>::max() - a, b) ? std::optional<S>() :
-        std::optional<S>(a + b);
-+        Less(std::numeric_limits<S>::max() - a, b) ? std::make_pair(S(), false) :
-+        std::make_pair(S(a + b), true);
- }
- 
- /// argument pack expansion termination for IncreaseSum<S, T, Args...>()
- template <typename S, typename T>
-std::optional<S>
-+std::pair<S, bool>
- IncreaseSum(const S s, const T t)
- {
-     // Force (always safe) integer promotions now, to give std::enable_if_t<>
-@@ -147,19 +145,20 @@ IncreaseSum(const S s, const T t)
- 
- /// \returns a non-overflowing sum of the arguments (or nothing)
- template <typename S, typename T, typename... Args>
-std::optional<S>
-+std::pair<S, bool>
- IncreaseSum(const S sum, const T t, const Args... args) {
-    if (const auto head = IncreaseSum(sum, t)) {
-        return IncreaseSum(head.value(), args...);
-+    const auto head = IncreaseSum(sum, t);
-+    if (head.second) {
-+        return IncreaseSum(head.first, args...);
-     } else {
-         // std::optional<S>() triggers bogus -Wmaybe-uninitialized warnings in GCC v10.3
-        return std::nullopt;
-+        return std::make_pair(S(), false);
-     }
- }
- 
- /// \returns an exact, non-overflowing sum of the arguments (or nothing)
- template <typename SummationType, typename... Args>
-std::optional<SummationType>
-+std::pair<SummationType, bool>
- NaturalSum(const Args... args) {
-     return IncreaseSum<SummationType>(0, args...);
- }
-diff --git a/src/Store.h b/src/Store.h
-index 3eb6b84..2475fe0 100644
--- a/src/Store.h
-+++ b/src/Store.h
-@@ -49,6 +49,9 @@ public:
-     StoreEntry();
-     virtual ~StoreEntry();
- 
-+    MemObject &mem() { assert(mem_obj); return *mem_obj; }
-+    const MemObject &mem() const { assert(mem_obj); return *mem_obj; }
-+
-     virtual HttpReply const *getReply() const;
-     virtual void write (StoreIOBuffer);
- 
-diff --git a/src/StoreClient.h b/src/StoreClient.h
-index 0524776..ba5e669 100644
--- a/src/StoreClient.h
-+++ b/src/StoreClient.h
-@@ -166,7 +166,7 @@ private:
-     /// request. Buffer contents depends on the source and parsing stage; it may
-     /// hold (parts of) swap metadata, HTTP response headers, and/or HTTP
-     /// response body bytes.
-    std::optional<Store::ParsingBuffer> parsingBuffer;
-+    std::pair<Store::ParsingBuffer, bool> parsingBuffer = std::make_pair(Store::ParsingBuffer(), false);
- 
-     StoreIOBuffer lastDiskRead; ///< buffer used for the last storeRead() call
- 
-diff --git a/src/acl/Asn.cc b/src/acl/Asn.cc
-index bcedc82..67e453f 100644
--- a/src/acl/Asn.cc
-+++ b/src/acl/Asn.cc
-@@ -73,7 +73,7 @@ class ASState
-     CBDATA_CLASS(ASState);
- 
- public:
-    ASState();
-+    ASState() = default;
-     ~ASState();
- 
-     StoreEntry *entry;
-@@ -87,18 +87,6 @@ public:
- 
- CBDATA_CLASS_INIT(ASState);
- 
-ASState::ASState() :
-    entry(NULL),
-    sc(NULL),
-    request(NULL),
-    as_number(0),
-    offset(0),
-    reqofs(0),
-    dataRead(false)
-{
-    memset(reqbuf, 0, AS_REQBUF_SZ);
-}
-
- ASState::~ASState()
- {
-     debugs(53, 3, entry->url());
-diff --git a/src/base/Assure.cc b/src/base/Assure.cc
-index b09b848..b4cf3e5 100644
--- a/src/base/Assure.cc
-+++ b/src/base/Assure.cc
-@@ -11,6 +11,14 @@
- #include "base/TextException.h"
- #include "sbuf/Stream.h"
- 
-+std::ostream &
-+operator <<(std::ostream &os, const TextException &ex)
-+{
-+    ex.print(os);
-+    return os;
-+}
-+
-+
- [[ noreturn ]] void
- ReportAndThrow_(const int debugLevel, const char *description, const SourceLocation &location)
- {
-diff --git a/src/client_side_reply.cc b/src/client_side_reply.cc
-index 470f4bc..64fd489 100644
--- a/src/client_side_reply.cc
-+++ b/src/client_side_reply.cc
-@@ -1142,8 +1142,8 @@ clientReplyContext::storeNotOKTransferDone() const
-     MemObject *mem = http->storeEntry()->mem_obj;
-     assert(mem != NULL);
-     assert(http->request != NULL);
-
-    if (mem->baseReply().pstate != Http::Message::psParsed)
-+    const auto expectedBodySize = mem->baseReply().content_length;
-+    if (mem->baseReply().pstate != psParsed)
-         return 0;
- 
-     /*
-@@ -1808,32 +1808,6 @@ clientReplyContext::SendMoreData(void *data, StoreIOBuffer result)
-     context->sendMoreData (result);
- }
- 
-/// Whether the given body area describes the start of our Client Stream buffer.
-/// An empty area does.
-bool
-clientReplyContext::matchesStreamBodyBuffer(const StoreIOBuffer &their) const
-{
-    // the answer is undefined for errors; they are not really "body buffers"
-    Assure(!their.flags.error);
-
-    if (!their.length)
-        return true; // an empty body area always matches our body area
-
-    if (their.data != next()->readBuffer.data) {
-        debugs(88, 7, "no: " << their << " vs. " << next()->readBuffer);
-        return false;
-    }
-
-    return true;
-}
-
-void
-clientReplyContext::noteStreamBufferredBytes(const StoreIOBuffer &result)
-{
-    Assure(matchesStreamBodyBuffer(result));
-    lastStreamBufferedBytes = result; // may be unchanged and/or zero-length
-}
-
- void
- clientReplyContext::makeThisHead()
- {
-@@ -2180,21 +2154,33 @@ clientReplyContext::sendMoreData (StoreIOBuffer result)
-         sc->setDelayId(DelayId::DelayClient(http,reply));
- #endif
- 
-    /* handle headers */
-+    holdingBuffer = result;
-+    processReplyAccess();
-+    return;
-+}
- 
-    if (Config.onoff.log_mime_hdrs) {
-        size_t k;
-+/// Whether the given body area describes the start of our Client Stream buffer.
-+/// An empty area does.
-+bool
-+clientReplyContext::matchesStreamBodyBuffer(const StoreIOBuffer &their) const
-+{
-+    // the answer is undefined for errors; they are not really "body buffers"
-+    Assure(!their.flags.error);
-+    if (!their.length)
-+        return true; // an empty body area always matches our body area
-+    if (their.data != next()->readBuffer.data) {
-+        debugs(88, 7, "no: " << their << " vs. " << next()->readBuffer);
-+        return false;
- 
-        if ((k = headersEnd(buf, reqofs))) {
-            safe_free(http->al->headers.reply);
-            http->al->headers.reply = (char *)xcalloc(k + 1, 1);
-            xstrncpy(http->al->headers.reply, buf, k);
-        }
-     }
-+    return true;
-+}
- 
-    holdingBuffer = result;
-    processReplyAccess();
-    return;
-+void
-+clientReplyContext::noteStreamBufferredBytes(const StoreIOBuffer &result)
-+{
-+    Assure(matchesStreamBodyBuffer(result));
-+    lastStreamBufferedBytes = result; // may be unchanged and/or zero-length
- }
- 
- /* Using this breaks the client layering just a little!
-diff --git a/src/peer_digest.cc b/src/peer_digest.cc
-index abfea4a..89ea73e 100644
--- a/src/peer_digest.cc
-+++ b/src/peer_digest.cc
-@@ -588,6 +588,7 @@ peerDigestFetchReply(void *data, char *buf, ssize_t size)
- 
-     return 0; // we consumed/used no buffered bytes
- }
-+}
- 
- int
- peerDigestSwapInCBlock(void *data, char *buf, ssize_t size)
-diff --git a/src/store/ParsingBuffer.cc b/src/store/ParsingBuffer.cc
-index e948fe2..affbe9e 100644
--- a/src/store/ParsingBuffer.cc
-+++ b/src/store/ParsingBuffer.cc
-@@ -28,19 +28,19 @@ Store::ParsingBuffer::ParsingBuffer(StoreIOBuffer &initialSpace):
- const char *
- Store::ParsingBuffer::memory() const
- {
-    return extraMemory_ ? extraMemory_->rawContent() : readerSuppliedMemory_.data;
-+    return extraMemory_.second ? extraMemory_.first.rawContent() : readerSuppliedMemory_.data;
- }
- 
- size_t
- Store::ParsingBuffer::capacity() const
- {
-    return extraMemory_ ? (extraMemory_->length() + extraMemory_->spaceSize()) : readerSuppliedMemory_.length;
-+    return extraMemory_.second ? (extraMemory_.first.length() + extraMemory_.first.spaceSize()) : readerSuppliedMemory_.length;
- }
- 
- size_t
- Store::ParsingBuffer::contentSize() const
- {
-    return extraMemory_ ? extraMemory_->length() : readerSuppliedMemoryContentSize_;
-+    return extraMemory_.second ? extraMemory_.first.length() : readerSuppliedMemoryContentSize_;
- }
- 
- void
-@@ -56,10 +56,10 @@ Store::ParsingBuffer::appended(const char * const newBytes, const size_t newByte
-     assert(memory() + contentSize() == newBytes); // the new bytes start in our space
-     // and now we know that newBytes is not nil either
- 
-    if (extraMemory_)
-        extraMemory_->rawAppendFinish(newBytes, newByteCount);
-+    if (extraMemory_.second)
-+        extraMemory_.first.rawAppendFinish(newBytes, newByteCount);
-     else
-        readerSuppliedMemoryContentSize_ = *IncreaseSum(readerSuppliedMemoryContentSize_, newByteCount);
-+        readerSuppliedMemoryContentSize_ = IncreaseSum(readerSuppliedMemoryContentSize_, newByteCount).first;
- 
-     assert(contentSize() <= capacity()); // paranoid
- }
-@@ -68,8 +68,8 @@ void
- Store::ParsingBuffer::consume(const size_t parsedBytes)
- {
-     Assure(contentSize() >= parsedBytes); // more conservative than extraMemory_->consume()
-    if (extraMemory_) {
-        extraMemory_->consume(parsedBytes);
-+    if (extraMemory_.second) {
-+        extraMemory_.first.consume(parsedBytes);
-     } else {
-         readerSuppliedMemoryContentSize_ -= parsedBytes;
-         if (parsedBytes && readerSuppliedMemoryContentSize_)
-@@ -81,8 +81,8 @@ StoreIOBuffer
- Store::ParsingBuffer::space()
- {
-     const auto size = spaceSize();
-    const auto start = extraMemory_ ?
-                       extraMemory_->rawAppendStart(size) :
-+    const auto start = extraMemory_.second ?
-+                       extraMemory_.first.rawAppendStart(size) :
-                        (readerSuppliedMemory_.data + readerSuppliedMemoryContentSize_);
-     return StoreIOBuffer(spaceSize(), 0, start);
- }
-@@ -110,22 +110,23 @@ void
- Store::ParsingBuffer::growSpace(const size_t minimumSpaceSize)
- {
-     const auto capacityIncreaseAttempt = IncreaseSum(contentSize(), minimumSpaceSize);
-    if (!capacityIncreaseAttempt)
-+    if (!capacityIncreaseAttempt.second)
-         throw TextException(ToSBuf("no support for a single memory block of ", contentSize(), '+', minimumSpaceSize, " bytes"), Here());
-    const auto newCapacity = *capacityIncreaseAttempt;
-+    const auto newCapacity = capacityIncreaseAttempt.first;
- 
-     if (newCapacity <= capacity())
-         return; // already have enough space; no reallocation is needed
- 
-     debugs(90, 7, "growing to provide " << minimumSpaceSize << " in " << *this);
- 
-    if (extraMemory_) {
-        extraMemory_->reserveCapacity(newCapacity);
-+    if (extraMemory_.second) {
-+        extraMemory_.first.reserveCapacity(newCapacity);
-     } else {
-         SBuf newStorage;
-         newStorage.reserveCapacity(newCapacity);
-         newStorage.append(readerSuppliedMemory_.data, readerSuppliedMemoryContentSize_);
-        extraMemory_ = std::move(newStorage);
-+        extraMemory_.first = std::move(newStorage);
-+        extraMemory_.second = true;
-     }
-     Assure(spaceSize() >= minimumSpaceSize);
- }
-@@ -133,14 +134,14 @@ Store::ParsingBuffer::growSpace(const size_t minimumSpaceSize)
- SBuf
- Store::ParsingBuffer::toSBuf() const
- {
-    return extraMemory_ ? *extraMemory_ : SBuf(content().data, content().length);
-+    return extraMemory_.second ? extraMemory_.first : SBuf(content().data, content().length);
- }
- 
- size_t
- Store::ParsingBuffer::spaceSize() const
- {
-    if (extraMemory_)
-        return extraMemory_->spaceSize();
-+    if (extraMemory_.second)
-+        return extraMemory_.first.spaceSize();
- 
-     assert(readerSuppliedMemoryContentSize_ <= readerSuppliedMemory_.length);
-     return readerSuppliedMemory_.length - readerSuppliedMemoryContentSize_;
-@@ -169,12 +170,12 @@ Store::ParsingBuffer::packBack()
-     result.length = bytesToPack;
-     Assure(result.data);
- 
-    if (!extraMemory_) {
-+    if (!extraMemory_.second) {
-         // no accumulated bytes copying because they are in readerSuppliedMemory_
-         debugs(90, 7, "quickly exporting " << result.length << " bytes via " << readerSuppliedMemory_);
-     } else {
-        debugs(90, 7, "slowly exporting " << result.length << " bytes from " << extraMemory_->id << " back into " << readerSuppliedMemory_);
-        memmove(result.data, extraMemory_->rawContent(), result.length);
-+        debugs(90, 7, "slowly exporting " << result.length << " bytes from " << extraMemory_.first.id << " back into " << readerSuppliedMemory_);
-+        memmove(result.data, extraMemory_.first.rawContent(), result.length);
-     }
- 
-     return result;
-@@ -185,9 +186,9 @@ Store::ParsingBuffer::print(std::ostream &os) const
- {
-     os << "size=" << contentSize();
- 
-    if (extraMemory_) {
-+    if (extraMemory_.second) {
-         os << " capacity=" << capacity();
-        os << " extra=" << extraMemory_->id;
-+        os << " extra=" << extraMemory_.first.id;
-     }
- 
-     // report readerSuppliedMemory_ (if any) even if we are no longer using it
-diff --git a/src/store/ParsingBuffer.h b/src/store/ParsingBuffer.h
-index b8aa957..b473ac6 100644
--- a/src/store/ParsingBuffer.h
-+++ b/src/store/ParsingBuffer.h
-@@ -112,7 +112,7 @@ private:
- 
-     /// our internal buffer that takes over readerSuppliedMemory_ when the
-     /// latter becomes full and more memory is needed
-    std::optional<SBuf> extraMemory_;
-+    std::pair<SBuf, bool> extraMemory_ = std::make_pair(SBuf(), false);
- };
- 
- inline std::ostream &
-diff --git a/src/store_client.cc b/src/store_client.cc
-index 383aac8..0236274 100644
--- a/src/store_client.cc
-+++ b/src/store_client.cc
-@@ -10,6 +10,7 @@
- 
- #include "squid.h"
- #include "base/AsyncCbdataCalls.h"
-+#include "base/Assure.h"
- #include "event.h"
- #include "globals.h"
- #include "HttpReply.h"
-@@ -118,24 +119,14 @@ store_client::finishCallback()
-     // pointers. Some other legacy code expects "correct" result.offset even
-     // when there is no body to return. Accommodate all those expectations.
-     auto result = StoreIOBuffer(0, copyInto.offset, nullptr);
-    if (object_ok && parsingBuffer && parsingBuffer->contentSize())
-        result = parsingBuffer->packBack();
-+    if (object_ok && parsingBuffer.second && parsingBuffer.first.contentSize())
-+        result = parsingBuffer.first.packBack();
-     result.flags.error = object_ok ? 0 : 1;
- 
-    // TODO: Move object_ok handling above into this `if` statement.
-    if (object_ok) {
-        // works for zero hdr_sz cases as well; see also: nextHttpReadOffset()
-        discardableHttpEnd_ = NaturalSum<int64_t>(entry->mem().baseReply().hdr_sz, result.offset, result.length).value();
-    } else {
-        // object_ok is sticky, so we will not be able to use any response bytes
-        discardableHttpEnd_ = entry->mem().endOffset();
-    }
-    debugs(90, 7, "with " << result << "; discardableHttpEnd_=" << discardableHttpEnd_);
-
-     // no HTTP headers and no body bytes (but not because there was no space)
-     atEof_ = !sendingHttpHeaders() && !result.length && copyInto.length;
- 
-    parsingBuffer.reset();
-+    parsingBuffer.second = false;
-     ++answers;
- 
-     STCB *temphandler = _callback.callback_handler;
-@@ -228,7 +219,9 @@ store_client::copy(StoreEntry * anEntry,
-     // when we already can respond with HTTP headers.
-     Assure(!copyInto.offset || answeredOnce());
- 
-    parsingBuffer.emplace(copyInto);
-+    parsingBuffer.first = Store::ParsingBuffer(copyInto);
-+    parsingBuffer.second = true;
-+
- 
-     discardableHttpEnd_ = nextHttpReadOffset();
-     debugs(90, 7, "discardableHttpEnd_=" << discardableHttpEnd_);
-@@ -454,14 +447,14 @@ store_client::canReadFromMemory() const
-     const auto &mem = entry->mem();
-     const auto memReadOffset = nextHttpReadOffset();
-     return mem.inmem_lo <= memReadOffset && memReadOffset < mem.endOffset() &&
-           parsingBuffer->spaceSize();
-+           parsingBuffer.first.spaceSize();
- }
- 
- /// The offset of the next stored HTTP response byte wanted by the client.
- int64_t
- store_client::nextHttpReadOffset() const
- {
-    Assure(parsingBuffer);
-+    Assure(parsingBuffer.second);
-     const auto &mem = entry->mem();
-     const auto hdr_sz = mem.baseReply().hdr_sz;
-     // Certain SMP cache manager transactions do not store HTTP headers in
-@@ -469,7 +462,7 @@ store_client::nextHttpReadOffset() const
-     // In such cases, hdr_sz ought to be zero. In all other (known) cases,
-     // mem_hdr contains HTTP response headers (positive hdr_sz if parsed)
-     // followed by HTTP response body. This code math accommodates all cases.
-    return NaturalSum<int64_t>(hdr_sz, copyInto.offset, parsingBuffer->contentSize()).value();
-+    return NaturalSum<int64_t>(hdr_sz, copyInto.offset, parsingBuffer.first.contentSize()).first;
- }
- 
- /// Copies at least some of the requested body bytes from MemObject memory,
-@@ -478,13 +471,13 @@ store_client::nextHttpReadOffset() const
- void
- store_client::readFromMemory()
- {
-    Assure(parsingBuffer);
-    const auto readInto = parsingBuffer->space().positionAt(nextHttpReadOffset());
-+    Assure(parsingBuffer.second);
-+    const auto readInto = parsingBuffer.first.space().positionAt(nextHttpReadOffset());
- 
-     debugs(90, 3, "copying HTTP body bytes from memory into " << readInto);
-     const auto sz = entry->mem_obj->data_hdr.copy(readInto);
-     Assure(sz > 0); // our canReadFromMemory() precondition guarantees that
-    parsingBuffer->appended(readInto.data, sz);
-+    parsingBuffer.first.appended(readInto.data, sz);
- }
- 
- void
-@@ -497,7 +490,7 @@ store_client::fileRead()
-     flags.disk_io_pending = true;
- 
-     // mem->swap_hdr_sz is zero here during initial read(s)
-    const auto nextStoreReadOffset = NaturalSum<int64_t>(mem->swap_hdr_sz, nextHttpReadOffset()).value();
-+    const auto nextStoreReadOffset = NaturalSum<int64_t>(mem->swap_hdr_sz, nextHttpReadOffset()).first;
- 
-     // XXX: If fileRead() is called when we do not yet know mem->swap_hdr_sz,
-     // then we must start reading from disk offset zero to learn it: we cannot
-@@ -522,10 +515,10 @@ store_client::fileRead()
-     // * performance effects of larger disk reads may be negative somewhere.
-     const decltype(StoreIOBuffer::length) maxReadSize = SM_PAGE_SIZE;
- 
-    Assure(parsingBuffer);
-+    Assure(parsingBuffer.second);
-     // also, do not read more than we can return (via a copyInto.length buffer)
-     const auto readSize = std::min(copyInto.length, maxReadSize);
-    lastDiskRead = parsingBuffer->makeSpace(readSize).positionAt(nextStoreReadOffset);
-+    lastDiskRead = parsingBuffer.first.makeSpace(readSize).positionAt(nextStoreReadOffset);
-     debugs(90, 5, "into " << lastDiskRead);
- 
-     storeRead(swapin_sio,
-@@ -540,13 +533,12 @@ store_client::fileRead()
- void
- store_client::readBody(const char * const buf, const ssize_t lastIoResult)
- {
-    int parsed_header = 0;
- 
-     Assure(flags.disk_io_pending);
-     flags.disk_io_pending = false;
-     assert(_callback.pending());
-    Assure(parsingBuffer);
-    debugs(90, 3, "got " << lastIoResult << " using " << *parsingBuffer);
-+    Assure(parsingBuffer.second);
-+    debugs(90, 3, "got " << lastIoResult << " using " << parsingBuffer.first);
-     if (lastIoResult < 0)
-         return fail();
- 
-@@ -560,7 +552,7 @@ store_client::readBody(const char * const buf, const ssize_t lastIoResult)
-     assert(lastDiskRead.data == buf);
-     lastDiskRead.length = lastIoResult;
- 
-    parsingBuffer->appended(buf, lastIoResult);
-+    parsingBuffer.first.appended(buf, lastIoResult);
- 
-     // we know swap_hdr_sz by now and were reading beyond swap metadata because
-     // readHead() would have been called otherwise (to read swap metadata)
-@@ -589,13 +581,12 @@ store_client::handleBodyFromDisk()
-     if (!answeredOnce()) {
-         // All on-disk responses have HTTP headers. First disk body read(s)
-         // include HTTP headers that we must parse (if needed) and skip.
-        const auto haveHttpHeaders = entry->mem_obj->baseReply().pstate == Http::Message::psParsed;
-+        const auto haveHttpHeaders = entry->mem_obj->baseReply().pstate == psParsed;
-         if (!haveHttpHeaders && !parseHttpHeadersFromDisk())
-             return;
-         skipHttpHeadersFromDisk();
-     }
- 
-    const HttpReply *rep = entry->getReply();
-     noteNews();
- }
- 
-@@ -626,8 +617,6 @@ store_client::maybeWriteFromDiskToMemory(const StoreIOBuffer &httpResponsePart)
-         }
-     }
- 
-}
-
- void
- store_client::fail()
- {
-@@ -735,20 +724,20 @@ store_client::readHeader(char const *buf, ssize_t len)
-     if (!object_ok)
-         return;
- 
-    Assure(parsingBuffer);
-    debugs(90, 3, "got " << len << " using " << *parsingBuffer);
-+    Assure(parsingBuffer.second);
-+    debugs(90, 3, "got " << len << " using " << parsingBuffer.first);
- 
-     if (len < 0)
-         return fail();
- 
-    Assure(!parsingBuffer->contentSize());
-    parsingBuffer->appended(buf, len);
-+    Assure(!parsingBuffer.first.contentSize());
-+    parsingBuffer.first.appended(buf, len);
-     if (!unpackHeader(buf, len)) {
-         fail();
-         return;
-     }
-    parsingBuffer->consume(mem->swap_hdr_sz);
-    maybeWriteFromDiskToMemory(parsingBuffer->content());
-+    parsingBuffer.first.consume(mem->swap_hdr_sz);
-+    maybeWriteFromDiskToMemory(parsingBuffer.first.content());
-     handleBodyFromDisk();
- }
- 
-@@ -1020,8 +1009,9 @@ store_client::parseHttpHeadersFromDisk()
-         // cache a header that we cannot parse and get here. Same for MemStore.
-         debugs(90, DBG_CRITICAL, "ERROR: Cannot parse on-disk HTTP headers" <<
-                Debug::Extra << "exception: " << CurrentException <<
-               Debug::Extra << "raw input size: " << parsingBuffer->contentSize() << " bytes" <<
-               Debug::Extra << "current buffer capacity: " << parsingBuffer->capacity() << " bytes");
-+               Debug::Extra << "raw input size: " << parsingBuffer.first.contentSize() << " bytes" <<
-+               Debug::Extra << "current buffer capacity: " << parsingBuffer.first.capacity() << " bytes");
-+
-         fail();
-         return false;
-     }
-@@ -1032,10 +1022,10 @@ store_client::parseHttpHeadersFromDisk()
- bool
- store_client::tryParsingHttpHeaders()
- {
-    Assure(parsingBuffer);
-+    Assure(parsingBuffer.second);
-     Assure(!copyInto.offset); // otherwise, parsingBuffer cannot have HTTP response headers
-    auto &adjustableReply = entry->mem().adjustableBaseReply();
-    if (adjustableReply.parseTerminatedPrefix(parsingBuffer->c_str(), parsingBuffer->contentSize()))
-+    auto &adjustableReply = entry->mem().baseReply();
-+    if (adjustableReply.parseTerminatedPrefix(parsingBuffer.first.c_str(), parsingBuffer.first.contentSize()))
-         return true;
- 
-     // TODO: Optimize by checking memory as well. For simplicity sake, we
-@@ -1052,12 +1042,12 @@ store_client::skipHttpHeadersFromDisk()
- {
-     const auto hdr_sz = entry->mem_obj->baseReply().hdr_sz;
-     Assure(hdr_sz > 0); // all on-disk responses have HTTP headers
-    if (Less(parsingBuffer->contentSize(), hdr_sz)) {
-        debugs(90, 5, "discovered " << hdr_sz << "-byte HTTP headers in memory after reading some of them from disk: " << *parsingBuffer);
-        parsingBuffer->consume(parsingBuffer->contentSize()); // skip loaded HTTP header prefix
-+    if (Less(parsingBuffer.first.contentSize(), hdr_sz)) {
-+        debugs(90, 5, "discovered " << hdr_sz << "-byte HTTP headers in memory after reading some of them from disk: " << parsingBuffer.first);
-+        parsingBuffer.first.consume(parsingBuffer.first.contentSize()); // skip loaded HTTP header prefix
-     } else {
-        parsingBuffer->consume(hdr_sz); // skip loaded HTTP headers
-        const auto httpBodyBytesAfterHeader = parsingBuffer->contentSize(); // may be zero
-+        parsingBuffer.first.consume(hdr_sz); // skip loaded HTTP headers
-+        const auto httpBodyBytesAfterHeader = parsingBuffer.first.contentSize(); // may be zero
-         Assure(httpBodyBytesAfterHeader <= copyInto.length);
-         debugs(90, 5, "read HTTP body prefix: " << httpBodyBytesAfterHeader);
-     }
-diff --git a/src/urn.cc b/src/urn.cc
-index 9f5e89d..ad42b74 100644
--- a/src/urn.cc
-+++ b/src/urn.cc
-@@ -238,7 +238,7 @@ urnHandleReply(void *data, StoreIOBuffer result)
-         return;
-     }
- 
-+    urnState->parsingBuffer.appended(result.data, result.length);
-+    urnState->parsingBuffer.appended(result.data, result.length);
- 
-     /* If we haven't received the entire object (urn), copy more */
-     if (!urnState->sc->atEof()) {
-- 
-2.39.3
-
--- a/SOURCES/perl-requires-squid.sh
+++ b/SOURCES/perl-requires-squid.sh
--- a/SOURCES/squid-4.15-CVE-2023-46724.patch
+++ b/SOURCES/squid-4.15-CVE-2023-46724.patch
@ -1,17 +1,5 @@
-From 792ef23e6e1c05780fe17f733859eef6eb8c8be3 Mon Sep 17 00:00:00 2001
-From: Andreas Weigel <andreas.weigel@securepoint.de>
-Date: Wed, 18 Oct 2023 04:14:31 +0000
-Subject: [PATCH] Fix validation of certificates with CN=* (#1523)
-
-The bug was discovered and detailed by Joshua Rogers at
-https://megamansec.github.io/Squid-Security-Audit/
-where it was filed as "Buffer UnderRead in SSL CN Parsing".
---
- src/anyp/Uri.cc | 6 ++++++
- 1 file changed, 6 insertions(+)
-
 diff --git a/src/anyp/Uri.cc b/src/anyp/Uri.cc
-index 77b6f0c92..a6a5d5d9e 100644
+index 20b9bf1..81ebb18 100644
 --- a/src/anyp/Uri.cc
 +++ b/src/anyp/Uri.cc
@@ -173,6 +173,10 @@ urlInitialize(void)
@ -34,5 +22,3 @@ index 77b6f0c92..a6a5d5d9e 100644
 
     /*
      * Start at the ends of the two strings and work towards the
-- 
-2.25.1
--- a/SOURCES/squid-4.15-CVE-2023-46728.patch
+++ b/SOURCES/squid-4.15-CVE-2023-46728.patch
--- a/SOURCES/squid-4.15-CVE-2023-49285.patch
+++ b/SOURCES/squid-4.15-CVE-2023-49285.patch
@ -1,22 +1,16 @@
-commit deee944f9a12c9fd399ce52f3e2526bb573a9470
+commit 77b3fb4df0f126784d5fd4967c28ed40eb8d521b
 Author: Alex Rousskov <rousskov@measurement-factory.com>
 Date:   Wed Oct 25 19:41:45 2023 +0000

    RFC 1123: Fix date parsing (#1538)
-
+    
    The bug was discovered and detailed by Joshua Rogers at
    https://megamansec.github.io/Squid-Security-Audit/datetime-overflow.html
    where it was filed as "1-Byte Buffer OverRead in RFC 1123 date/time
    Handling".

-Back port upstream patch
-Signed-Off-By: tianyue.lan@oracle.com
---
- lib/rfc1123.c | 6 ++++++
- 1 file changed, 6 insertions(+)
-
 diff --git a/lib/rfc1123.c b/lib/rfc1123.c
-index 2d889cc..add63f0 100644
+index e5bf9a4d7..cb484cc00 100644
 --- a/lib/rfc1123.c
 +++ b/lib/rfc1123.c
@@ -50,7 +50,13 @@ make_month(const char *s)
@ -33,6 +27,4 @@ index 2d889cc..add63f0 100644
     month[2] = xtolower(*(s + 2));
 
     for (i = 0; i < 12; i++)
-- 
-2.39.3

--- a/SOURCES/squid-4.15-CVE-2023-49286.patch
+++ b/SOURCES/squid-4.15-CVE-2023-49286.patch
@ -1,28 +1,5 @@
-commit 6014c6648a2a54a4ecb7f952ea1163e0798f9264
-Author: Alex Rousskov <rousskov@measurement-factory.com>
-Date:   Fri Oct 27 21:27:20 2023 +0000
-
-    Exit without asserting when helper process startup fails (#1543)
-
-    ... to dup() after fork() and before execvp().
-
-    Assertions are for handling program logic errors. Helper initialization
-    code already handled system call errors correctly (i.e. by exiting the
-    newly created helper process with an error), except for a couple of
-    assert()s that could be triggered by dup(2) failures.
-
-    This bug was discovered and detailed by Joshua Rogers at
-    https://megamansec.github.io/Squid-Security-Audit/ipc-assert.html
-    where it was filed as 'Assertion in Squid "Helper" Process Creator'.
-
-Back port upstream patch
-Signed-Off-By: tianyue.lan@oracle.com
---
- src/ipc.cc | 32 ++++++++++++++++++++++++++------
- 1 file changed, 26 insertions(+), 6 deletions(-)
-
 diff --git a/src/ipc.cc b/src/ipc.cc
-index e92a27f..3ddae70 100644
+index 42e11e6..a68e623 100644
 --- a/src/ipc.cc
 +++ b/src/ipc.cc
@@ -19,6 +19,11 @@
@ -83,6 +60,3 @@ index e92a27f..3ddae70 100644
 
     assert(t1 > 2 && t2 > 2 && t3 > 2);
 
-- 
-2.39.3
-
--- a/SOURCES/squid-4.15-CVE-2023-50269.patch
+++ b/SOURCES/squid-4.15-CVE-2023-50269.patch
@ -0,0 +1,50 @@
+diff --git a/src/ClientRequestContext.h b/src/ClientRequestContext.h
+index fe2edf6..47aa935 100644
+--- a/src/ClientRequestContext.h
+++ b/src/ClientRequestContext.h
+@@ -81,6 +81,10 @@ public:
+ #endif
+     ErrorState *error; ///< saved error page for centralized/delayed processing
+     bool readNextRequest; ///< whether Squid should read after error handling
+
+#if FOLLOW_X_FORWARDED_FOR
+    size_t currentXffHopNumber = 0; ///< number of X-Forwarded-For header values processed so far
+#endif
+ };
+ 
+ #endif /* SQUID_CLIENTREQUESTCONTEXT_H */
+diff --git a/src/client_side_request.cc b/src/client_side_request.cc
+index 1c6ff62..b758f6f 100644
+--- a/src/client_side_request.cc
+++ b/src/client_side_request.cc
+@@ -78,6 +78,11 @@
+ static const char *const crlf = "\r\n";
+ 
+ #if FOLLOW_X_FORWARDED_FOR
+
+#if !defined(SQUID_X_FORWARDED_FOR_HOP_MAX)
+#define SQUID_X_FORWARDED_FOR_HOP_MAX 64
+#endif
+
+ static void clientFollowXForwardedForCheck(allow_t answer, void *data);
+ #endif /* FOLLOW_X_FORWARDED_FOR */
+ 
+@@ -485,8 +490,16 @@ clientFollowXForwardedForCheck(allow_t answer, void *data)
+                 /* override the default src_addr tested if we have to go deeper than one level into XFF */
+                 Filled(calloutContext->acl_checklist)->src_addr = request->indirect_client_addr;
+             }
+-            calloutContext->acl_checklist->nonBlockingCheck(clientFollowXForwardedForCheck, data);
+-            return;
+            if (++calloutContext->currentXffHopNumber < SQUID_X_FORWARDED_FOR_HOP_MAX) {
+                calloutContext->acl_checklist->nonBlockingCheck(clientFollowXForwardedForCheck, data);
+                return;
+            }
+            const auto headerName = Http::HeaderLookupTable.lookup(Http::HdrType::X_FORWARDED_FOR).name;
+            debugs(28, DBG_CRITICAL, "ERROR: Ignoring trailing " << headerName << " addresses" <<
+                   Debug::Extra << "addresses allowed by follow_x_forwarded_for: " << calloutContext->currentXffHopNumber <<
+                   Debug::Extra << "last/accepted address: " << request->indirect_client_addr <<
+                   Debug::Extra << "ignored trailing addresses: " << request->x_forwarded_for_iterator);
+            // fall through to resume clientAccessCheck() processing
+         }
+     }
+ 
--- a/SOURCES/0002-Remove-serialized-HTTP-headers-from-storeClientCopy.patch
+++ b/SOURCES/0002-Remove-serialized-HTTP-headers-from-storeClientCopy.patch
--- a/SOURCES/squid-4.15-CVE-2024-25111.patch
+++ b/SOURCES/squid-4.15-CVE-2024-25111.patch
@ -0,0 +1,193 @@
+diff --git a/src/http.cc b/src/http.cc
+index b006300..023e411 100644
+--- a/src/http.cc
+++ b/src/http.cc
+@@ -52,6 +52,7 @@
+ #include "rfc1738.h"
+ #include "SquidConfig.h"
+ #include "SquidTime.h"
+#include "SquidMath.h"
+ #include "StatCounters.h"
+ #include "Store.h"
+ #include "StrList.h"
+@@ -1150,18 +1151,26 @@ HttpStateData::readReply(const CommIoCbParams &io)
+      * Plus, it breaks our lame *HalfClosed() detection
+      */
+ 
+-    Must(maybeMakeSpaceAvailable(true));
+-    CommIoCbParams rd(this); // will be expanded with ReadNow results
+-    rd.conn = io.conn;
+-    rd.size = entry->bytesWanted(Range<size_t>(0, inBuf.spaceSize()));
+    size_t moreDataPermission = 0;
+    if ((!canBufferMoreReplyBytes(&moreDataPermission) || !moreDataPermission)) {
+        abortTransaction("ready to read required data, but the read buffer is full and cannot be drained");
+        return;
+    }
+
+    const auto readSizeMax = maybeMakeSpaceAvailable(moreDataPermission);
+    // TODO: Move this logic inside maybeMakeSpaceAvailable():
+    const auto readSizeWanted = readSizeMax ? entry->bytesWanted(Range<size_t>(0, readSizeMax)) : 0;
+ 
+-    if (rd.size <= 0) {
+    if (readSizeWanted <= 0) {
+         assert(entry->mem_obj);
+         AsyncCall::Pointer nilCall;
+         entry->mem_obj->delayRead(DeferredRead(readDelayed, this, CommRead(io.conn, NULL, 0, nilCall)));
+         return;
+     }
+ 
+    CommIoCbParams rd(this); // will be expanded with ReadNow results
+    rd.conn = io.conn;
+    rd.size = readSizeWanted;
+     switch (Comm::ReadNow(rd, inBuf)) {
+     case Comm::INPROGRESS:
+         if (inBuf.isEmpty())
+@@ -1520,8 +1529,11 @@ HttpStateData::maybeReadVirginBody()
+     if (!Comm::IsConnOpen(serverConnection) || fd_table[serverConnection->fd].closing())
+         return;
+ 
+-    if (!maybeMakeSpaceAvailable(false))
+    size_t moreDataPermission = 0;
+    if ((!canBufferMoreReplyBytes(&moreDataPermission)) || !moreDataPermission) {
+        abortTransaction("more response bytes required, but the read buffer is full and cannot be drained");
+         return;
+    }
+ 
+     // XXX: get rid of the do_next_read flag
+     // check for the proper reasons preventing read(2)
+@@ -1539,40 +1551,79 @@ HttpStateData::maybeReadVirginBody()
+     Comm::Read(serverConnection, call);
+ }
+ 
+/// Desired inBuf capacity based on various capacity preferences/limits:
+/// * a smaller buffer may not hold enough for look-ahead header/body parsers;
+/// * a smaller buffer may result in inefficient tiny network reads;
+/// * a bigger buffer may waste memory;
+/// * a bigger buffer may exceed SBuf storage capabilities (SBuf::maxSize);
+size_t
+HttpStateData::calcReadBufferCapacityLimit() const
+{
+    if (!flags.headers_parsed)
+        return Config.maxReplyHeaderSize;
+
+    // XXX: Our inBuf is not used to maintain the read-ahead gap, and using
+    // Config.readAheadGap like this creates huge read buffers for large
+    // read_ahead_gap values. TODO: Switch to using tcp_recv_bufsize as the
+    // primary read buffer capacity factor.
+    //
+    // TODO: Cannot reuse throwing NaturalCast() here. Consider removing
+    // .value() dereference in NaturalCast() or add/use NaturalCastOrMax().
+    const auto configurationPreferences = NaturalSum<size_t>(Config.readAheadGap).second ? NaturalSum<size_t>(Config.readAheadGap).first : SBuf::maxSize;
+
+    // TODO: Honor TeChunkedParser look-ahead and trailer parsing requirements
+    // (when explicit configurationPreferences are set too low).
+
+    return std::min<size_t>(configurationPreferences, SBuf::maxSize);
+}
+
+/// The maximum number of virgin reply bytes we may buffer before we violate
+/// the currently configured response buffering limits.
+/// \retval std::nullopt means that no more virgin response bytes can be read
+/// \retval 0 means that more virgin response bytes may be read later
+/// \retval >0 is the number of bytes that can be read now (subject to other constraints)
+ bool
+-HttpStateData::maybeMakeSpaceAvailable(bool doGrow)
+HttpStateData::canBufferMoreReplyBytes(size_t *maxReadSize) const
+ {
+-    // how much we are allowed to buffer
+-    const int limitBuffer = (flags.headers_parsed ? Config.readAheadGap : Config.maxReplyHeaderSize);
+-
+-    if (limitBuffer < 0 || inBuf.length() >= (SBuf::size_type)limitBuffer) {
+-        // when buffer is at or over limit already
+-        debugs(11, 7, "will not read up to " << limitBuffer << ". buffer has (" << inBuf.length() << "/" << inBuf.spaceSize() << ") from " << serverConnection);
+-        debugs(11, DBG_DATA, "buffer has {" << inBuf << "}");
+-        // Process next response from buffer
+-        processReply();
+-        return false;
+#if USE_ADAPTATION
+    // If we do not check this now, we may say the final "no" prematurely below
+    // because inBuf.length() will decrease as adaptation drains buffered bytes.
+    if (responseBodyBuffer) {
+        debugs(11, 3, "yes, but waiting for adaptation to drain read buffer");
+        *maxReadSize = 0; // yes, we may be able to buffer more (but later)
+        return true;
+    }
+#endif
+
+    const auto maxCapacity = calcReadBufferCapacityLimit();
+    if (inBuf.length() >= maxCapacity) {
+        debugs(11, 3, "no, due to a full buffer: " << inBuf.length() << '/' << inBuf.spaceSize() << "; limit: " << maxCapacity);
+        return false; // no, configuration prohibits buffering more
+     }
+ 
+    *maxReadSize = (maxCapacity - inBuf.length()); // positive
+    debugs(11, 7, "yes, may read up to " << *maxReadSize << " into " << inBuf.length() << '/' << inBuf.spaceSize());
+    return true; // yes, can read up to this many bytes (subject to other constraints)
+}
+
+/// prepare read buffer for reading
+/// \return the maximum number of bytes the caller should attempt to read
+/// \retval 0 means that the caller should delay reading
+size_t
+HttpStateData::maybeMakeSpaceAvailable(const size_t maxReadSize)
+{
+     // how much we want to read
+-    const size_t read_size = calcBufferSpaceToReserve(inBuf.spaceSize(), (limitBuffer - inBuf.length()));
+    const size_t read_size = calcBufferSpaceToReserve(inBuf.spaceSize(), maxReadSize);
+ 
+-    if (!read_size) {
+    if (read_size < 2) {
+         debugs(11, 7, "will not read up to " << read_size << " into buffer (" << inBuf.length() << "/" << inBuf.spaceSize() << ") from " << serverConnection);
+-        return false;
+        return 0;
+     }
+ 
+-    // just report whether we could grow or not, do not actually do it
+-    if (doGrow)
+-        return (read_size >= 2);
+-
+     // we may need to grow the buffer
+     inBuf.reserveSpace(read_size);
+-    debugs(11, 8, (!flags.do_next_read ? "will not" : "may") <<
+-           " read up to " << read_size << " bytes info buf(" << inBuf.length() << "/" << inBuf.spaceSize() <<
+-           ") from " << serverConnection);
+-
+-    return (inBuf.spaceSize() >= 2); // only read if there is 1+ bytes of space available
+    debugs(11, 7, "may read up to " << read_size << " bytes info buffer (" << inBuf.length() << "/" << inBuf.spaceSize() << ") from " << serverConnection);
+    return read_size;
+ }
+ 
+ /// called after writing the very last request byte (body, last-chunk, etc)
+diff --git a/src/http.h b/src/http.h
+index 8965b77..007d2e6 100644
+--- a/src/http.h
+++ b/src/http.h
+@@ -15,6 +15,8 @@
+ #include "http/StateFlags.h"
+ #include "sbuf/SBuf.h"
+ 
+#include <optional>
+
+ class FwdState;
+ class HttpHeader;
+ 
+@@ -107,16 +109,9 @@ private:
+ 
+     void abortTransaction(const char *reason) { abortAll(reason); } // abnormal termination
+ 
+-    /**
+-     * determine if read buffer can have space made available
+-     * for a read.
+-     *
+-     * \param grow  whether to actually expand the buffer
+-     *
+-     * \return whether the buffer can be grown to provide space
+-     *         regardless of whether the grow actually happened.
+-     */
+-    bool maybeMakeSpaceAvailable(bool grow);
+    size_t calcReadBufferCapacityLimit() const;
+    bool canBufferMoreReplyBytes(size_t *maxReadSize) const;
+    size_t maybeMakeSpaceAvailable(size_t maxReadSize);
+ 
+     // consuming request body
+     virtual void handleMoreRequestBodyAvailable();
--- a/SOURCES/squid-4.15-CVE-2024-25617.patch
+++ b/SOURCES/squid-4.15-CVE-2024-25617.patch
@ -0,0 +1,105 @@
+diff --git a/src/SquidString.h b/src/SquidString.h
+index a791885..b9aef38 100644
+--- a/src/SquidString.h
+++ b/src/SquidString.h
+@@ -114,7 +114,16 @@ private:
+ 
+     size_type len_;  /* current length  */
+ 
+-    static const size_type SizeMax_ = 65535; ///< 64K limit protects some fixed-size buffers
+    /// An earlier 64KB limit was meant to protect some fixed-size buffers, but
+    /// (a) we do not know where those buffers are (or whether they still exist)
+    /// (b) too many String users unknowingly exceeded that limit and asserted.
+    /// We are now using a larger limit to reduce the number of (b) cases,
+    /// especially cases where "compact" lists of items grow 50% in size when we
+    /// convert them to canonical form. The new limit is selected to withstand
+    /// concatenation and ~50% expansion of two HTTP headers limited by default
+    /// request_header_max_size and reply_header_max_size settings.
+    static const size_type SizeMax_ = 3*64*1024 - 1;
+
+     /// returns true after increasing the first argument by extra if the sum does not exceed SizeMax_
+     static bool SafeAdd(size_type &base, size_type extra) { if (extra <= SizeMax_ && base <= SizeMax_ - extra) { base += extra; return true; } return false; }
+ 
+diff --git a/src/cache_cf.cc b/src/cache_cf.cc
+index a9c1b7e..46f07bb 100644
+--- a/src/cache_cf.cc
+++ b/src/cache_cf.cc
+@@ -935,6 +935,18 @@ configDoConfigure(void)
+                (uint32_t)Config.maxRequestBufferSize, (uint32_t)Config.maxRequestHeaderSize);
+     }
+ 
+    // Warn about the dangers of exceeding String limits when manipulating HTTP
+    // headers. Technically, we do not concatenate _requests_, so we could relax
+    // their check, but we keep the two checks the same for simplicity sake.
+    const auto safeRawHeaderValueSizeMax = (String::SizeMaxXXX()+1)/3;
+    // TODO: static_assert(safeRawHeaderValueSizeMax >= 64*1024); // no WARNINGs for default settings
+    if (Config.maxRequestHeaderSize > safeRawHeaderValueSizeMax)
+        debugs(3, DBG_CRITICAL, "WARNING: Increasing request_header_max_size beyond " << safeRawHeaderValueSizeMax <<
+               " bytes makes Squid more vulnerable to denial-of-service attacks; configured value: " << Config.maxRequestHeaderSize << " bytes");
+    if (Config.maxReplyHeaderSize > safeRawHeaderValueSizeMax)
+        debugs(3, DBG_CRITICAL, "WARNING: Increasing reply_header_max_size beyond " << safeRawHeaderValueSizeMax <<
+               " bytes makes Squid more vulnerable to denial-of-service attacks; configured value: " << Config.maxReplyHeaderSize << " bytes");
+
+     /*
+      * Disable client side request pipelining if client_persistent_connections OFF.
+      * Waste of resources queueing any pipelined requests when the first will close the connection.
+diff --git a/src/cf.data.pre b/src/cf.data.pre
+index bc2ddcd..d55b870 100644
+--- a/src/cf.data.pre
+++ b/src/cf.data.pre
+@@ -6196,11 +6196,14 @@ TYPE: b_size_t
+ DEFAULT: 64 KB
+ LOC: Config.maxRequestHeaderSize
+ DOC_START
+-	This specifies the maximum size for HTTP headers in a request.
+-	Request headers are usually relatively small (about 512 bytes).
+-	Placing a limit on the request header size will catch certain
+-	bugs (for example with persistent connections) and possibly
+-	buffer-overflow or denial-of-service attacks.
+	This directives limits the header size of a received HTTP request
+	(including request-line). Increasing this limit beyond its 64 KB default
+	exposes certain old Squid code to various denial-of-service attacks. This
+	limit also applies to received FTP commands.
+
+	This limit has no direct affect on Squid memory consumption.
+
+	Squid does not check this limit when sending requests.
+ DOC_END
+ 
+ NAME: reply_header_max_size
+@@ -6209,11 +6212,14 @@ TYPE: b_size_t
+ DEFAULT: 64 KB
+ LOC: Config.maxReplyHeaderSize
+ DOC_START
+-	This specifies the maximum size for HTTP headers in a reply.
+-	Reply headers are usually relatively small (about 512 bytes).
+-	Placing a limit on the reply header size will catch certain
+-	bugs (for example with persistent connections) and possibly
+-	buffer-overflow or denial-of-service attacks.
+	This directives limits the header size of a received HTTP response
+	(including status-line). Increasing this limit beyond its 64 KB default
+	exposes certain old Squid code to various denial-of-service attacks. This
+	limit also applies to FTP command responses.
+
+	Squid also checks this limit when loading hit responses from disk cache.
+
+	Squid does not check this limit when sending responses.
+ DOC_END
+ 
+ NAME: request_body_max_size
+diff --git a/src/http.cc b/src/http.cc
+index 877172d..b006300 100644
+--- a/src/http.cc
+++ b/src/http.cc
+@@ -1820,8 +1820,9 @@ HttpStateData::httpBuildRequestHeader(HttpRequest * request,
+ 
+         String strFwd = hdr_in->getList(Http::HdrType::X_FORWARDED_FOR);
+ 
+-        // if we cannot double strFwd size, then it grew past 50% of the limit
+-        if (!strFwd.canGrowBy(strFwd.size())) {
+        // Detect unreasonably long header values. And paranoidly check String
+        // limits: a String ought to accommodate two reasonable-length values.
+        if (strFwd.size() > 32*1024 || !strFwd.canGrowBy(strFwd.size())) {
+             // There is probably a forwarding loop with Via detection disabled.
+             // If we do nothing, String will assert on overflow soon.
+             // TODO: Terminate all transactions with huge XFF?
--- a/SOURCES/squid-4.15.tar.xz.asc
+++ b/SOURCES/squid-4.15.tar.xz.asc
@ -0,0 +1,25 @@
+File: squid-4.15.tar.xz
+Date: Mon 10 May 2021 10:50:22 UTC
+Size: 2454176
+MD5 : a593de9dc888dfeca4f1f7db2cd7d3b9
+SHA1: 60bda34ba39657e2d870c8c1d2acece8a69c3075
+Key : CD6DBF8EF3B17D3E <squid3@treenet.co.nz>
+            B068 84ED B779 C89B 044E  64E3 CD6D BF8E F3B1 7D3E
+      keyring = http://www.squid-cache.org/pgp.asc
+      keyserver = pool.sks-keyservers.net
+-----BEGIN PGP SIGNATURE-----
+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+=1Re1
+-----END PGP SIGNATURE-----
--- a/SOURCES/squid.nm
+++ b/SOURCES/squid.nm
--- a/SPECS/squid.spec
+++ b/SPECS/squid.spec
@ -2,7 +2,7 @@

 Name:     squid
 Version:  4.15
-Release:  7%{?dist}.5
+Release:  7%{?dist}.10
 Summary:  The Squid proxy caching server
 Epoch:    7
 # See CREDITS for breakdown of non GPLv2+ code
@ -53,20 +53,22 @@ Patch302: squid-4.15-CVE-2022-41318.patch
 Patch303: squid-4.15-CVE-2023-46846.patch
 # https://bugzilla.redhat.com/show_bug.cgi?id=2245916
 Patch304: squid-4.15-CVE-2023-46847.patch
-
-#Oracle patches
-Patch1001: 0001-Break-long-store_client-call-chains-with-async-calls.patch
-Patch1002: 0002-Remove-serialized-HTTP-headers-from-storeClientCopy.patch
-Patch1003: 0003-Bug-5309-frequent-lowestOffset-target_offset-asserti.patch
-Patch1004: 0004-Remove-mem_hdr-freeDataUpto-assertion-1562.patch
-Patch1005: 0005-Backport-Add-Assure-as-a-replacement-for-problematic.patch
-Patch1006: 0006-Backport-additional-functions-for-SquidMath.patch
-Patch1007: 0007-Adapt-to-older-gcc-cleanup.patch
-Patch1008: squid-4.15-CVE-2023-46724.patch 
-Patch1009: squid-4.15-CVE-2023-46728.patch
-Patch1010: squid-4.15-CVE-2023-49285.patch
-Patch1011: squid-4.15-CVE-2023-49286.patch
-
+# https://issues.redhat.com/browse/RHEL-14792
+Patch305: squid-4.15-CVE-2023-5824.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2248521
+Patch306: squid-4.15-CVE-2023-46728.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2247567
+Patch307: squid-4.15-CVE-2023-46724.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2252926
+Patch308: squid-4.15-CVE-2023-49285.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2252923
+Patch309: squid-4.15-CVE-2023-49286.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2264309
+Patch310: squid-4.15-CVE-2024-25617.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2268366
+Patch311: squid-4.15-CVE-2024-25111.patch
+# https://bugzilla.redhat.com/show_bug.cgi?id=2254663
+Patch312: squid-4.15-CVE-2023-50269.patch

 Requires: bash >= 2.0
 Requires(pre): shadow-utils
@ -136,20 +138,14 @@ lookup program (dnsserver), a program for retrieving FTP data
 %patch302 -p1 -b .CVE-2022-41318
 %patch303 -p1 -b .CVE-2023-46846
 %patch304 -p1 -b .CVE-2023-46847
-
-
-# Oracle patches
-%patch1001 -p1
-%patch1002 -p1
-%patch1003 -p1
-%patch1004 -p1
-%patch1005 -p1
-%patch1006 -p1
-%patch1007 -p1
-%patch1008 -p1
-%patch1009 -p1
-%patch1010 -p1
-%patch1011 -p1
+%patch305 -p1 -b .CVE-2023-5824
+%patch306 -p1 -b .CVE-2023-46728
+%patch307 -p1 -b .CVE-2023-46724
+%patch308 -p1 -b .CVE-2023-49285
+%patch309 -p1 -b .CVE-2023-49286
+%patch310 -p1 -b .CVE-2024-25617
+%patch311 -p1 -b .CVE-2024-25111
+%patch312 -p1 -b .CVE-2023-50269

 # https://bugzilla.redhat.com/show_bug.cgi?id=1679526
 # Patch in the vendor documentation and used different location for documentation
@ -366,14 +362,37 @@ fi


 %changelog
-* Wed Jan 03 2024 Tianyue Lan <tianyue.lan@oracle.com> - 7:4.15-7.5
- Fix squid: Denial of Service in SSL Certificate validation (CVE-2023-46724)
- Fix squid: NULL pointer dereference in the gopher protocol code (CVE-2023-46728)
- Fix squid: Buffer over-read in the HTTP Message processing feature (CVE-2023-49285)
- Fix squid: Incorrect Check of Function Return Value In Helper Process management(CVE-2023-49286)
+* Thu Mar 14 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-7.10
+- Resolves: RHEL-19551 - squid:4/squid: denial of service in HTTP request
+  parsing (CVE-2023-50269)

-* Sun Dec 09 2023 Alex Burmashev <alexander.burmashev@oracle.com> - 7:4.15-7.3
- Fix squid: DoS against HTTP and HTTPS (CVE-2023-5824)
+* Fri Mar 08 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-7.9
+- Resolves: RHEL-28611 - squid:4/squid: Denial of Service in HTTP Chunked
+  Decoding (CVE-2024-25111)
+
+* Mon Feb 26 2024 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-7.6
+- Resolves: RHEL-26087 - squid:4/squid: denial of service in HTTP header
+  parser (CVE-2024-25617)
+
+* Thu Dec 07 2023 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-7.5
+- Resolves: RHEL-18483 - squid:4/squid: Buffer over-read in the HTTP Message
+  processing feature (CVE-2023-49285)
+- Resolves: RHEL-18485 - squid:4/squid: Incorrect Check of Function Return
+  Value In Helper Process management (CVE-2023-49286)
+
+* Wed Dec 06 2023 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-7.4
+- Resolves: RHEL-16764 - squid:4/squid: Denial of Service in SSL Certificate
+  validation (CVE-2023-46724)
+- Resolves: RHEL-16775 - squid:4/squid: NULL pointer dereference in the gopher
+  protocol code (CVE-2023-46728)
+- Resolves: RHEL-18257 - squid crashes in assertion when a parent peer exists
+
+* Thu Nov 30 2023 Tomas Korbar <tkorbar@redhat.com> - 7:4.15-7.3
+- Related: RHEL-14792 - squid: squid multiple issues in HTTP response caching
+- Fix mistake in the patch
+
+* Tue Nov 21 2023 Tomas Korbar <tkorbar@redhat.com> - 7:4.15-7.2
+- Resolves: RHEL-14792 - squid: squid multiple issues in HTTP response caching

 * Mon Oct 30 2023 Luboš Uhliarik <luhliari@redhat.com> - 7:4.15-7.1
 - Resolves: RHEL-14801 - squid: squid: Denial of Service in HTTP Digest