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16 changed files with 5308 additions and 13 deletions

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@ -0,0 +1,46 @@
From 6c26ede8edcb700caca12c501c6c129801989526 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Fri, 23 Feb 2024 10:12:47 +1100
Subject: [PATCH] Do not use header_prev in expire_lru_headers
dns__cacherbt_expireheader can unlink / free header_prev underneath
it. Use ISC_LIST_TAIL after calling dns__cacherbt_expireheader
instead to get the next pointer to be processed.
(cherry picked from commit 7ce2e86024f022decb2678963538515ca39ab4ab)
(cherry picked from commit f88f21b7d890eb80097f4bd434fedb29c2f9ff63)
---
lib/dns/rbtdb.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index cc40eaec60..ee59c1b18b 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -10667,19 +10667,19 @@ update_header(dns_rbtdb_t *rbtdb, rdatasetheader_t *header,
static size_t
expire_lru_headers(dns_rbtdb_t *rbtdb, unsigned int locknum, size_t purgesize,
bool tree_locked) {
- rdatasetheader_t *header, *header_prev;
+ rdatasetheader_t *header;
size_t purged = 0;
for (header = ISC_LIST_TAIL(rbtdb->rdatasets[locknum]);
- header != NULL && purged <= purgesize; header = header_prev)
+ header != NULL && purged <= purgesize;
+ header = ISC_LIST_TAIL(rbtdb->rdatasets[locknum]))
{
- header_prev = ISC_LIST_PREV(header, link);
/*
* Unlink the entry at this point to avoid checking it
* again even if it's currently used someone else and
* cannot be purged at this moment. This entry won't be
* referenced any more (so unlinking is safe) since the
- * TTL was reset to 0.
+ * TTL will be reset to 0.
*/
ISC_LIST_UNLINK(rbtdb->rdatasets[locknum], header, link);
size_t header_size = rdataset_size(header);
--
2.43.2

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@ -0,0 +1,193 @@
From f3aa755ba5ae5148dd0567357f8c538072e2eabc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Tue, 30 May 2023 08:46:17 +0200
Subject: [PATCH] Improve RBT overmem cache cleaning
When cache memory usage is over the configured cache size (overmem) and
we are cleaning unused entries, it might not be enough to clean just two
entries if the entries to be expired are smaller than the newly added
rdata. This could be abused by an attacker to cause a remote Denial of
Service by possibly running out of the operating system memory.
Currently, the addrdataset() tries to do a single TTL-based cleaning
considering the serve-stale TTL and then optionally moves to overmem
cleaning if we are in that condition. Then the overmem_purge() tries to
do another single TTL based cleaning from the TTL heap and then continue
with LRU-based cleaning up to 2 entries cleaned.
Squash the TTL-cleaning mechanism into single call from addrdataset(),
but ignore the serve-stale TTL if we are currently overmem.
Then instead of having a fixed number of entries to clean, pass the size
of newly added rdatasetheader to the overmem_purge() function and
cleanup at least the size of the newly added data. This prevents the
cache going over the configured memory limit (`max-cache-size`).
Additionally, refactor the overmem_purge() function to reduce for-loop
nesting for readability.
---
lib/dns/rbtdb.c | 109 +++++++++++++++++++++++++++++-------------------
1 file changed, 67 insertions(+), 42 deletions(-)
diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index 11203e4..cc40eae 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -834,7 +834,7 @@ static void update_header(dns_rbtdb_t *rbtdb, rdatasetheader_t *header,
static void expire_header(dns_rbtdb_t *rbtdb, rdatasetheader_t *header,
bool tree_locked, expire_t reason);
static void overmem_purge(dns_rbtdb_t *rbtdb, unsigned int locknum_start,
- isc_stdtime_t now, bool tree_locked);
+ size_t purgesize, bool tree_locked);
static isc_result_t resign_insert(dns_rbtdb_t *rbtdb, int idx,
rdatasetheader_t *newheader);
static void resign_delete(dns_rbtdb_t *rbtdb, rbtdb_version_t *version,
@@ -6937,6 +6937,16 @@ addclosest(dns_rbtdb_t *rbtdb, rdatasetheader_t *newheader,
static dns_dbmethods_t zone_methods;
+static size_t
+rdataset_size(rdatasetheader_t *header) {
+ if (!NONEXISTENT(header)) {
+ return (dns_rdataslab_size((unsigned char *)header,
+ sizeof(*header)));
+ }
+
+ return (sizeof(*header));
+}
+
static isc_result_t
addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
isc_stdtime_t now, dns_rdataset_t *rdataset, unsigned int options,
@@ -7091,7 +7101,8 @@ addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
}
if (cache_is_overmem)
- overmem_purge(rbtdb, rbtnode->locknum, now, tree_locked);
+ overmem_purge(rbtdb, rbtnode->locknum, rdataset_size(newheader),
+ tree_locked);
NODE_LOCK(&rbtdb->node_locks[rbtnode->locknum].lock,
isc_rwlocktype_write);
@@ -7106,9 +7117,19 @@ addrdataset(dns_db_t *db, dns_dbnode_t *node, dns_dbversion_t *version,
cleanup_dead_nodes(rbtdb, rbtnode->locknum);
header = isc_heap_element(rbtdb->heaps[rbtnode->locknum], 1);
- if (header && header->rdh_ttl < now - RBTDB_VIRTUAL)
- expire_header(rbtdb, header, tree_locked,
- expire_ttl);
+ if (header != NULL) {
+ dns_ttl_t rdh_ttl = header->rdh_ttl;
+
+ /* Only account for stale TTL if cache is not overmem */
+ if (!cache_is_overmem) {
+ rdh_ttl += rbtdb->serve_stale_ttl;
+ }
+
+ if (rdh_ttl < now - RBTDB_VIRTUAL) {
+ expire_header(rbtdb, header, tree_locked,
+ expire_ttl);
+ }
+ }
/*
* If we've been holding a write lock on the tree just for
@@ -10643,54 +10664,58 @@ update_header(dns_rbtdb_t *rbtdb, rdatasetheader_t *header,
ISC_LIST_PREPEND(rbtdb->rdatasets[header->node->locknum], header, link);
}
+static size_t
+expire_lru_headers(dns_rbtdb_t *rbtdb, unsigned int locknum, size_t purgesize,
+ bool tree_locked) {
+ rdatasetheader_t *header, *header_prev;
+ size_t purged = 0;
+
+ for (header = ISC_LIST_TAIL(rbtdb->rdatasets[locknum]);
+ header != NULL && purged <= purgesize; header = header_prev)
+ {
+ header_prev = ISC_LIST_PREV(header, link);
+ /*
+ * Unlink the entry at this point to avoid checking it
+ * again even if it's currently used someone else and
+ * cannot be purged at this moment. This entry won't be
+ * referenced any more (so unlinking is safe) since the
+ * TTL was reset to 0.
+ */
+ ISC_LIST_UNLINK(rbtdb->rdatasets[locknum], header, link);
+ size_t header_size = rdataset_size(header);
+ expire_header(rbtdb, header, tree_locked, expire_lru);
+ purged += header_size;
+ }
+
+ return (purged);
+}
+
/*%
- * Purge some expired and/or stale (i.e. unused for some period) cache entries
- * under an overmem condition. To recover from this condition quickly, up to
- * 2 entries will be purged. This process is triggered while adding a new
- * entry, and we specifically avoid purging entries in the same LRU bucket as
- * the one to which the new entry will belong. Otherwise, we might purge
- * entries of the same name of different RR types while adding RRsets from a
- * single response (consider the case where we're adding A and AAAA glue records
- * of the same NS name).
+ * Purge some stale (i.e. unused for some period - LRU based cleaning) cache
+ * entries under the overmem condition. To recover from this condition quickly,
+ * we cleanup entries up to the size of newly added rdata (passed as purgesize).
+ *
+ * This process is triggered while adding a new entry, and we specifically avoid
+ * purging entries in the same LRU bucket as the one to which the new entry will
+ * belong. Otherwise, we might purge entries of the same name of different RR
+ * types while adding RRsets from a single response (consider the case where
+ * we're adding A and AAAA glue records of the same NS name).
*/
static void
-overmem_purge(dns_rbtdb_t *rbtdb, unsigned int locknum_start,
- isc_stdtime_t now, bool tree_locked)
+overmem_purge(dns_rbtdb_t *rbtdb, unsigned int locknum_start, size_t purgesize,
+ bool tree_locked)
{
- rdatasetheader_t *header, *header_prev;
unsigned int locknum;
- int purgecount = 2;
+ size_t purged = 0;
for (locknum = (locknum_start + 1) % rbtdb->node_lock_count;
- locknum != locknum_start && purgecount > 0;
+ locknum != locknum_start && purged <= purgesize;
locknum = (locknum + 1) % rbtdb->node_lock_count) {
NODE_LOCK(&rbtdb->node_locks[locknum].lock,
isc_rwlocktype_write);
- header = isc_heap_element(rbtdb->heaps[locknum], 1);
- if (header && header->rdh_ttl < now - RBTDB_VIRTUAL) {
- expire_header(rbtdb, header, tree_locked,
- expire_ttl);
- purgecount--;
- }
-
- for (header = ISC_LIST_TAIL(rbtdb->rdatasets[locknum]);
- header != NULL && purgecount > 0;
- header = header_prev) {
- header_prev = ISC_LIST_PREV(header, link);
- /*
- * Unlink the entry at this point to avoid checking it
- * again even if it's currently used someone else and
- * cannot be purged at this moment. This entry won't be
- * referenced any more (so unlinking is safe) since the
- * TTL was reset to 0.
- */
- ISC_LIST_UNLINK(rbtdb->rdatasets[locknum], header,
- link);
- expire_header(rbtdb, header, tree_locked,
- expire_lru);
- purgecount--;
- }
+ purged += expire_lru_headers(rbtdb, locknum, purgesize - purged,
+ tree_locked);
NODE_UNLOCK(&rbtdb->node_locks[locknum].lock,
isc_rwlocktype_write);
--
2.40.1

File diff suppressed because it is too large Load Diff

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@ -0,0 +1,64 @@
From f0fc9d7999a94da3d471c4e0a35b1f447f25eea6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
Date: Mon, 26 Feb 2024 21:08:42 +0100
Subject: [PATCH] Add normal task queue also to non-thread version
Non-thread builds are used by us for dhcp package. Make it working
again.
Related to [GL #4424] and [GL #4459].
---
lib/isc/task.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/lib/isc/task.c b/lib/isc/task.c
index cc83269..5315b51 100644
--- a/lib/isc/task.c
+++ b/lib/isc/task.c
@@ -1115,7 +1115,7 @@ dispatch(isc__taskmgr_t *manager, isc_taskqueue_t qid) {
}
#else /* USE_WORKER_THREADS */
if (total_dispatch_count >= DEFAULT_TASKMGR_QUANTUM ||
- empty_readyq(manager))
+ empty_readyq(manager, qid))
break;
#endif /* USE_WORKER_THREADS */
XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_TASK,
@@ -1318,11 +1318,11 @@ dispatch(isc__taskmgr_t *manager, isc_taskqueue_t qid) {
}
#ifndef USE_WORKER_THREADS
- ISC_LIST_APPENDLIST(manager->ready_tasks, new_ready_tasks, ready_link);
- ISC_LIST_APPENDLIST(manager->ready_priority_tasks, new_priority_tasks,
+ ISC_LIST_APPENDLIST(manager->ready_tasks[qid], new_ready_tasks, ready_link);
+ ISC_LIST_APPENDLIST(manager->ready_priority_tasks[qid], new_priority_tasks,
ready_priority_link);
manager->tasks_ready += tasks_ready;
- if (empty_readyq(manager))
+ if (empty_readyq(manager, qid))
manager->mode = isc_taskmgrmode_normal;
#endif
@@ -1713,7 +1713,8 @@ isc__taskmgr_ready(isc_taskmgr_t *manager0) {
return (false);
LOCK(&manager->lock);
- is_ready = !empty_readyq(manager);
+ is_ready = !empty_readyq(manager, isc_taskqueue_normal) ||
+ !empty_readyq(manager, isc_taskqueue_slow);
UNLOCK(&manager->lock);
return (is_ready);
@@ -1730,7 +1731,8 @@ isc__taskmgr_dispatch(isc_taskmgr_t *manager0) {
if (manager == NULL)
return (ISC_R_NOTFOUND);
- dispatch(manager);
+ dispatch(manager, isc_taskqueue_normal);
+ dispatch(manager, isc_taskqueue_slow);
return (ISC_R_SUCCESS);
}
--
2.43.2

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@ -0,0 +1,737 @@
From 4c20ab54ec503f65d8ee0b863cbf41103d95130a Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Wed, 22 Nov 2023 16:59:03 +1100
Subject: [PATCH] Fail the DNSSEC validation on the first failure
Be more strict when encountering DNSSEC validation failures - fail on
the first failure. This will break domains that have DNSSEC signing
keys with duplicate key ids, but this is something that's much easier
to fix on the authoritative side, so we are just going to be strict
on the resolver side where it is causing performance problems.
(cherry picked from commit 8b7ecba9885e163c07c2dd3e1ceab79b2ba89e34)
Add normal and slow task queues
Split the task manager queues into normal and slow task queues, so we
can move the tasks that blocks processing for a long time (like DNSSEC
validation) into the slow queue which doesn't block fast
operations (like responding from the cache). This mitigates the whole
class of KeyTrap-like issues.
(cherry picked from commit db083a21726300916fa0b9fd8a433a796fedf636)
Don't iterate from start every time we select new signing key
Improve the selecting of the new signing key by remembering where
we stopped the iteration and just continue from that place instead
of iterating from the start over and over again each time.
(cherry picked from commit 75faeefcab47e4f1e12b358525190b4be90f97de)
Optimize selecting the signing key
Don't parse the crypto data before parsing and matching the id and the
algorithm.
(cherry picked from commit b38552cca7200a72658e482f8407f57516efc5db)
6322. [security] Specific DNS answers could cause a denial-of-service
condition due to DNS validation taking a long time.
(CVE-2023-50387) [GL #4424]
The same code change also addresses another problem:
preparing NSEC3 closest encloser proofs could exhaust
available CPU resources. (CVE-2023-50868) [GL #4459]
---
lib/dns/dst_api.c | 25 ++++--
lib/dns/include/dns/validator.h | 1 +
lib/dns/include/dst/dst.h | 4 +
lib/dns/resolver.c | 2 +-
lib/dns/validator.c | 97 +++++++++-----------
lib/dns/win32/libdns.def.in | 1 +
lib/isc/include/isc/task.h | 11 ++-
lib/isc/task.c | 153 ++++++++++++++++++++++----------
8 files changed, 186 insertions(+), 108 deletions(-)
diff --git a/lib/dns/dst_api.c b/lib/dns/dst_api.c
index 2156384ec1..6bcd99796c 100644
--- a/lib/dns/dst_api.c
+++ b/lib/dns/dst_api.c
@@ -105,6 +105,7 @@ static isc_result_t frombuffer(dns_name_t *name,
dns_rdataclass_t rdclass,
isc_buffer_t *source,
isc_mem_t *mctx,
+ bool no_rdata,
dst_key_t **keyp);
static isc_result_t algorithm_status(unsigned int alg);
@@ -764,6 +765,13 @@ isc_result_t
dst_key_fromdns(dns_name_t *name, dns_rdataclass_t rdclass,
isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
{
+ return (dst_key_fromdns_ex(name, rdclass, source, mctx, false, keyp));
+}
+
+isc_result_t
+dst_key_fromdns_ex(dns_name_t *name, dns_rdataclass_t rdclass,
+ isc_buffer_t *source, isc_mem_t *mctx, bool no_rdata,
+ dst_key_t **keyp) {
uint8_t alg, proto;
uint32_t flags, extflags;
dst_key_t *key = NULL;
@@ -792,7 +800,7 @@ dst_key_fromdns(dns_name_t *name, dns_rdataclass_t rdclass,
}
result = frombuffer(name, alg, flags, proto, rdclass, source,
- mctx, &key);
+ mctx, no_rdata, &key);
if (result != ISC_R_SUCCESS)
return (result);
key->key_id = id;
@@ -814,7 +822,7 @@ dst_key_frombuffer(dns_name_t *name, unsigned int alg,
REQUIRE(dst_initialized);
result = frombuffer(name, alg, flags, protocol, rdclass, source,
- mctx, &key);
+ mctx, false, &key);
if (result != ISC_R_SUCCESS)
return (result);
@@ -1915,7 +1923,8 @@ computeid(dst_key_t *key) {
static isc_result_t
frombuffer(dns_name_t *name, unsigned int alg, unsigned int flags,
unsigned int protocol, dns_rdataclass_t rdclass,
- isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp)
+ isc_buffer_t *source, isc_mem_t *mctx, bool no_rdata,
+ dst_key_t **keyp)
{
dst_key_t *key;
isc_result_t ret;
@@ -1940,10 +1949,12 @@ frombuffer(dns_name_t *name, unsigned int alg, unsigned int flags,
return (DST_R_UNSUPPORTEDALG);
}
- ret = key->func->fromdns(key, source);
- if (ret != ISC_R_SUCCESS) {
- dst_key_free(&key);
- return (ret);
+ if (!no_rdata) {
+ ret = key->func->fromdns(key, source);
+ if (ret != ISC_R_SUCCESS) {
+ dst_key_free(&key);
+ return (ret);
+ }
}
}
diff --git a/lib/dns/include/dns/validator.h b/lib/dns/include/dns/validator.h
index cc4478d6d4..b4bf8f29db 100644
--- a/lib/dns/include/dns/validator.h
+++ b/lib/dns/include/dns/validator.h
@@ -160,6 +160,7 @@ struct dns_validator {
unsigned int depth;
unsigned int authcount;
unsigned int authfail;
+ bool failed;
isc_stdtime_t start;
};
diff --git a/lib/dns/include/dst/dst.h b/lib/dns/include/dst/dst.h
index 180c841307..a8be2daf67 100644
--- a/lib/dns/include/dst/dst.h
+++ b/lib/dns/include/dst/dst.h
@@ -435,6 +435,10 @@ dst_key_tofile(const dst_key_t *key, int type, const char *directory);
*/
isc_result_t
+dst_key_fromdns_ex(dns_name_t *name, dns_rdataclass_t rdclass,
+ isc_buffer_t *source, isc_mem_t *mctx, bool no_rdata,
+ dst_key_t **keyp);
+isc_result_t
dst_key_fromdns(dns_name_t *name, dns_rdataclass_t rdclass,
isc_buffer_t *source, isc_mem_t *mctx, dst_key_t **keyp);
/*%<
diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c
index 4f71f48039..487107614c 100644
--- a/lib/dns/resolver.c
+++ b/lib/dns/resolver.c
@@ -9267,7 +9267,7 @@ dns_resolver_create(dns_view_t *view,
if (result != ISC_R_SUCCESS)
goto cleanup_buckets;
res->buckets[i].task = NULL;
- result = isc_task_create(taskmgr, 0, &res->buckets[i].task);
+ result = isc_task_create(taskmgr, ISC_TASK_QUANTUM_SLOW, &res->buckets[i].task);
if (result != ISC_R_SUCCESS) {
DESTROYLOCK(&res->buckets[i].lock);
goto cleanup_buckets;
diff --git a/lib/dns/validator.c b/lib/dns/validator.c
index 2a5c3caa6a..0b257fe874 100644
--- a/lib/dns/validator.c
+++ b/lib/dns/validator.c
@@ -1207,6 +1207,12 @@ create_validator(dns_validator_t *val, dns_name_t *name, dns_rdatatype_t type,
* val->key at it.
*
* If val->key is non-NULL, this returns the next matching key.
+ * If val->key is already non-NULL, start searching from the next position in
+ * 'rdataset' to find the *next* key that could have signed 'siginfo', then
+ * set val->key to that.
+ *
+ * Returns ISC_R_SUCCESS if a possible matching key has been found,
+ * ISC_R_NOTFOUND if not. Any other value indicates error.
*/
static isc_result_t
get_dst_key(dns_validator_t *val, dns_rdata_rrsig_t *siginfo,
@@ -1216,54 +1222,59 @@ get_dst_key(dns_validator_t *val, dns_rdata_rrsig_t *siginfo,
isc_buffer_t b;
dns_rdata_t rdata = DNS_RDATA_INIT;
dst_key_t *oldkey = val->key;
- bool foundold;
+ bool no_rdata = false;
- if (oldkey == NULL)
- foundold = true;
- else {
- foundold = false;
+ if (oldkey == NULL) {
+ result = dns_rdataset_first(rdataset);
+ } else {
+ dst_key_free(&oldkey);
val->key = NULL;
+ result = dns_rdataset_next(rdataset);
+ }
+
+ if (result != ISC_R_SUCCESS) {
+ goto done;
}
- result = dns_rdataset_first(rdataset);
- if (result != ISC_R_SUCCESS)
- goto failure;
do {
dns_rdataset_current(rdataset, &rdata);
isc_buffer_init(&b, rdata.data, rdata.length);
isc_buffer_add(&b, rdata.length);
INSIST(val->key == NULL);
- result = dst_key_fromdns(&siginfo->signer, rdata.rdclass, &b,
- val->view->mctx, &val->key);
+ result = dst_key_fromdns_ex(&siginfo->signer, rdata.rdclass, &b,
+ val->view->mctx, no_rdata,
+ &val->key);
if (result == ISC_R_SUCCESS) {
if (siginfo->algorithm ==
(dns_secalg_t)dst_key_alg(val->key) &&
siginfo->keyid ==
(dns_keytag_t)dst_key_id(val->key) &&
+ (dst_key_flags(val->key) & DNS_KEYFLAG_REVOKE) ==
+ 0 &&
dst_key_iszonekey(val->key))
{
- if (foundold) {
- /*
- * This is the key we're looking for.
- */
- return (ISC_R_SUCCESS);
- } else if (dst_key_compare(oldkey, val->key)) {
- foundold = true;
- dst_key_free(&oldkey);
+ if (no_rdata) {
+ /* Retry with full key */
+ dns_rdata_reset(&rdata);
+ dst_key_free(&val->key);
+ no_rdata = false;
+ continue;
}
+ /* This is the key we're looking for. */
+ goto done;
}
dst_key_free(&val->key);
}
dns_rdata_reset(&rdata);
result = dns_rdataset_next(rdataset);
+ no_rdata = true;
} while (result == ISC_R_SUCCESS);
- if (result == ISC_R_NOMORE)
- result = ISC_R_NOTFOUND;
- failure:
- if (oldkey != NULL)
- dst_key_free(&oldkey);
+done:
+ if (result == ISC_R_NOMORE) {
+ result = ISC_R_NOTFOUND;
+ }
return (result);
}
@@ -1633,37 +1644,13 @@ validate(dns_validator_t *val, bool resume) {
continue;
}
- do {
- vresult = verify(val, val->key, &rdata,
- val->siginfo->keyid);
- if (vresult == ISC_R_SUCCESS)
- break;
- if (val->keynode != NULL) {
- dns_keynode_t *nextnode = NULL;
- result = dns_keytable_findnextkeynode(
- val->keytable,
- val->keynode,
- &nextnode);
- dns_keytable_detachkeynode(val->keytable,
- &val->keynode);
- val->keynode = nextnode;
- if (result != ISC_R_SUCCESS) {
- val->key = NULL;
- break;
- }
- val->key = dns_keynode_key(val->keynode);
- if (val->key == NULL)
- break;
- } else {
- if (get_dst_key(val, val->siginfo, val->keyset)
- != ISC_R_SUCCESS)
- break;
- }
- } while (1);
- if (vresult != ISC_R_SUCCESS)
+ vresult = verify(val, val->key, &rdata,
+ val->siginfo->keyid);
+ if (vresult != ISC_R_SUCCESS) {
+ val->failed = true;
validator_log(val, ISC_LOG_DEBUG(3),
"failed to verify rdataset");
- else {
+ } else {
dns_rdataset_trimttl(event->rdataset,
event->sigrdataset,
val->siginfo, val->start,
@@ -1700,9 +1687,13 @@ validate(dns_validator_t *val, bool resume) {
} else {
validator_log(val, ISC_LOG_DEBUG(3),
"verify failure: %s",
- isc_result_totext(result));
+ isc_result_totext(vresult));
resume = false;
}
+ if (val->failed) {
+ result = ISC_R_NOMORE;
+ break;
+ }
}
if (result != ISC_R_NOMORE) {
validator_log(val, ISC_LOG_DEBUG(3),
diff --git a/lib/dns/win32/libdns.def.in b/lib/dns/win32/libdns.def.in
index f597049493..7320653439 100644
--- a/lib/dns/win32/libdns.def.in
+++ b/lib/dns/win32/libdns.def.in
@@ -1439,6 +1439,7 @@ dst_key_format
dst_key_free
dst_key_frombuffer
dst_key_fromdns
+dst_key_fromdns_ex
dst_key_fromfile
dst_key_fromgssapi
dst_key_fromlabel
diff --git a/lib/isc/include/isc/task.h b/lib/isc/include/isc/task.h
index 28e5e25fc6..42f7763869 100644
--- a/lib/isc/include/isc/task.h
+++ b/lib/isc/include/isc/task.h
@@ -98,8 +98,15 @@ ISC_LANG_BEGINDECLS
***/
typedef enum {
- isc_taskmgrmode_normal = 0,
- isc_taskmgrmode_privileged
+ isc_taskqueue_normal = 0,
+ isc_taskqueue_slow = 1,
+} isc_taskqueue_t;
+
+#define ISC_TASK_QUANTUM_SLOW 1024
+
+typedef enum {
+ isc_taskmgrmode_normal = 0,
+ isc_taskmgrmode_privileged
} isc_taskmgrmode_t;
/*% Task and task manager methods */
diff --git a/lib/isc/task.c b/lib/isc/task.c
index 048639350b..cc83269df2 100644
--- a/lib/isc/task.c
+++ b/lib/isc/task.c
@@ -107,6 +107,7 @@ struct isc__task {
isc_eventlist_t on_shutdown;
unsigned int nevents;
unsigned int quantum;
+ unsigned int qid;
unsigned int flags;
isc_stdtime_t now;
isc_time_t tnow;
@@ -141,11 +142,11 @@ struct isc__taskmgr {
/* Locked by task manager lock. */
unsigned int default_quantum;
LIST(isc__task_t) tasks;
- isc__tasklist_t ready_tasks;
- isc__tasklist_t ready_priority_tasks;
+ isc__tasklist_t ready_tasks[2];
+ isc__tasklist_t ready_priority_tasks[2];
isc_taskmgrmode_t mode;
#ifdef ISC_PLATFORM_USETHREADS
- isc_condition_t work_available;
+ isc_condition_t work_available[2];
isc_condition_t exclusive_granted;
isc_condition_t paused;
#endif /* ISC_PLATFORM_USETHREADS */
@@ -247,13 +248,13 @@ isc_taskmgrmode_t
isc__taskmgr_mode(isc_taskmgr_t *manager0);
static inline bool
-empty_readyq(isc__taskmgr_t *manager);
+empty_readyq(isc__taskmgr_t *manager, isc_taskqueue_t qid);
static inline isc__task_t *
-pop_readyq(isc__taskmgr_t *manager);
+pop_readyq(isc__taskmgr_t *manager, isc_taskqueue_t qid);
static inline void
-push_readyq(isc__taskmgr_t *manager, isc__task_t *task);
+push_readyq(isc__taskmgr_t *manager, isc__task_t *task, isc_taskqueue_t qid);
static struct isc__taskmethods {
isc_taskmethods_t methods;
@@ -324,7 +325,8 @@ task_finished(isc__task_t *task) {
* any idle worker threads so they
* can exit.
*/
- BROADCAST(&manager->work_available);
+ BROADCAST(&manager->work_available[isc_taskqueue_normal]);
+ BROADCAST(&manager->work_available[isc_taskqueue_slow]);
}
#endif /* USE_WORKER_THREADS */
UNLOCK(&manager->lock);
@@ -364,7 +366,13 @@ isc__task_create(isc_taskmgr_t *manager0, unsigned int quantum,
INIT_LIST(task->events);
INIT_LIST(task->on_shutdown);
task->nevents = 0;
- task->quantum = quantum;
+ if (quantum >= ISC_TASK_QUANTUM_SLOW) {
+ task->qid = isc_taskqueue_slow;
+ task->quantum = quantum - ISC_TASK_QUANTUM_SLOW;
+ } else {
+ task->qid = isc_taskqueue_normal;
+ task->quantum = quantum;
+ }
task->flags = 0;
task->now = 0;
isc_time_settoepoch(&task->tnow);
@@ -476,11 +484,11 @@ task_ready(isc__task_t *task) {
LOCK(&manager->lock);
LOCK(&task->lock);
- push_readyq(manager, task);
+ push_readyq(manager, task, task->qid);
UNLOCK(&task->lock);
#ifdef USE_WORKER_THREADS
if (manager->mode == isc_taskmgrmode_normal || has_privilege)
- SIGNAL(&manager->work_available);
+ SIGNAL(&manager->work_available[task->qid]);
#endif /* USE_WORKER_THREADS */
UNLOCK(&manager->lock);
}
@@ -961,13 +969,13 @@ isc__task_getcurrenttimex(isc_task_t *task0, isc_time_t *t) {
* Caller must hold the task manager lock.
*/
static inline bool
-empty_readyq(isc__taskmgr_t *manager) {
+empty_readyq(isc__taskmgr_t *manager, isc_taskqueue_t qid) {
isc__tasklist_t queue;
if (manager->mode == isc_taskmgrmode_normal)
- queue = manager->ready_tasks;
+ queue = manager->ready_tasks[qid];
else
- queue = manager->ready_priority_tasks;
+ queue = manager->ready_priority_tasks[qid];
return (EMPTY(queue));
}
@@ -981,18 +989,18 @@ empty_readyq(isc__taskmgr_t *manager) {
* Caller must hold the task manager lock.
*/
static inline isc__task_t *
-pop_readyq(isc__taskmgr_t *manager) {
+pop_readyq(isc__taskmgr_t *manager, isc_taskqueue_t qid) {
isc__task_t *task;
if (manager->mode == isc_taskmgrmode_normal)
- task = HEAD(manager->ready_tasks);
+ task = HEAD(manager->ready_tasks[qid]);
else
- task = HEAD(manager->ready_priority_tasks);
+ task = HEAD(manager->ready_priority_tasks[qid]);
if (task != NULL) {
- DEQUEUE(manager->ready_tasks, task, ready_link);
+ DEQUEUE(manager->ready_tasks[qid], task, ready_link);
if (ISC_LINK_LINKED(task, ready_priority_link))
- DEQUEUE(manager->ready_priority_tasks, task,
+ DEQUEUE(manager->ready_priority_tasks[qid], task,
ready_priority_link);
}
@@ -1006,16 +1014,16 @@ pop_readyq(isc__taskmgr_t *manager) {
* Caller must hold the task manager lock.
*/
static inline void
-push_readyq(isc__taskmgr_t *manager, isc__task_t *task) {
- ENQUEUE(manager->ready_tasks, task, ready_link);
+push_readyq(isc__taskmgr_t *manager, isc__task_t *task, isc_taskqueue_t qid) {
+ ENQUEUE(manager->ready_tasks[qid], task, ready_link);
if ((task->flags & TASK_F_PRIVILEGED) != 0)
- ENQUEUE(manager->ready_priority_tasks, task,
+ ENQUEUE(manager->ready_priority_tasks[qid], task,
ready_priority_link);
manager->tasks_ready++;
}
static void
-dispatch(isc__taskmgr_t *manager) {
+dispatch(isc__taskmgr_t *manager, isc_taskqueue_t qid) {
isc__task_t *task;
#ifndef USE_WORKER_THREADS
unsigned int total_dispatch_count = 0;
@@ -1094,13 +1102,13 @@ dispatch(isc__taskmgr_t *manager) {
* If a pause has been requested, don't do any work
* until it's been released.
*/
- while ((empty_readyq(manager) || manager->pause_requested ||
+ while ((empty_readyq(manager, qid) || manager->pause_requested ||
manager->exclusive_requested) && !FINISHED(manager))
{
XTHREADTRACE(isc_msgcat_get(isc_msgcat,
ISC_MSGSET_GENERAL,
ISC_MSG_WAIT, "wait"));
- WAIT(&manager->work_available, &manager->lock);
+ WAIT(&manager->work_available[qid], &manager->lock);
XTHREADTRACE(isc_msgcat_get(isc_msgcat,
ISC_MSGSET_TASK,
ISC_MSG_AWAKE, "awake"));
@@ -1113,7 +1121,7 @@ dispatch(isc__taskmgr_t *manager) {
XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_TASK,
ISC_MSG_WORKING, "working"));
- task = pop_readyq(manager);
+ task = pop_readyq(manager, qid);
if (task != NULL) {
unsigned int dispatch_count = 0;
bool done = false;
@@ -1278,7 +1286,7 @@ dispatch(isc__taskmgr_t *manager) {
*/
#ifdef USE_WORKER_THREADS
LOCK(&task->lock);
- push_readyq(manager, task);
+ push_readyq(manager, task, qid);
UNLOCK(&task->lock);
#else
ENQUEUE(new_ready_tasks, task, ready_link);
@@ -1297,10 +1305,14 @@ dispatch(isc__taskmgr_t *manager) {
* we're stuck. Automatically drop privileges at that
* point and continue with the regular ready queue.
*/
- if (manager->tasks_running == 0 && empty_readyq(manager)) {
+ if (manager->tasks_running == 0 && empty_readyq(manager, isc_taskqueue_normal) && empty_readyq(manager, isc_taskqueue_slow)) {
manager->mode = isc_taskmgrmode_normal;
- if (!empty_readyq(manager))
- BROADCAST(&manager->work_available);
+ if (!empty_readyq(manager, isc_taskqueue_normal)) {
+ BROADCAST(&manager->work_available[isc_taskqueue_normal]);
+ }
+ if (!empty_readyq(manager, isc_taskqueue_slow)) {
+ BROADCAST(&manager->work_available[isc_taskqueue_slow]);
+ }
}
#endif
}
@@ -1322,13 +1334,37 @@ static isc_threadresult_t
#ifdef _WIN32
WINAPI
#endif
-run(void *uap) {
+run_normal(void *uap) {
isc__taskmgr_t *manager = uap;
XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
ISC_MSG_STARTING, "starting"));
- dispatch(manager);
+ dispatch(manager, isc_taskqueue_normal);
+
+ XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
+ ISC_MSG_EXITING, "exiting"));
+
+#ifdef OPENSSL_LEAKS
+ ERR_remove_state(0);
+#endif
+
+ return ((isc_threadresult_t)0);
+}
+#endif /* USE_WORKER_THREADS */
+
+#ifdef USE_WORKER_THREADS
+static isc_threadresult_t
+#ifdef _WIN32
+WINAPI
+#endif
+run_slow(void *uap) {
+ isc__taskmgr_t *manager = uap;
+
+ XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
+ ISC_MSG_STARTING, "starting"));
+
+ dispatch(manager, isc_taskqueue_slow);
XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
ISC_MSG_EXITING, "exiting"));
@@ -1347,7 +1383,8 @@ manager_free(isc__taskmgr_t *manager) {
#ifdef USE_WORKER_THREADS
(void)isc_condition_destroy(&manager->exclusive_granted);
- (void)isc_condition_destroy(&manager->work_available);
+ (void)isc_condition_destroy(&manager->work_available[isc_taskqueue_normal]);
+ (void)isc_condition_destroy(&manager->work_available[isc_taskqueue_slow]);
(void)isc_condition_destroy(&manager->paused);
isc_mem_free(manager->mctx, manager->threads);
#endif /* USE_WORKER_THREADS */
@@ -1414,12 +1451,20 @@ isc__taskmgr_create(isc_mem_t *mctx, unsigned int workers,
#ifdef USE_WORKER_THREADS
manager->workers = 0;
manager->threads = isc_mem_allocate(mctx,
- workers * sizeof(isc_thread_t));
+ 2 * workers * sizeof(isc_thread_t));
if (manager->threads == NULL) {
result = ISC_R_NOMEMORY;
goto cleanup_lock;
}
- if (isc_condition_init(&manager->work_available) != ISC_R_SUCCESS) {
+ if (isc_condition_init(&manager->work_available[isc_taskqueue_normal]) != ISC_R_SUCCESS) {
+ UNEXPECTED_ERROR(__FILE__, __LINE__,
+ "isc_condition_init() %s",
+ isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
+ ISC_MSG_FAILED, "failed"));
+ result = ISC_R_UNEXPECTED;
+ goto cleanup_threads;
+ }
+ if (isc_condition_init(&manager->work_available[isc_taskqueue_slow]) != ISC_R_SUCCESS) {
UNEXPECTED_ERROR(__FILE__, __LINE__,
"isc_condition_init() %s",
isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
@@ -1448,8 +1493,10 @@ isc__taskmgr_create(isc_mem_t *mctx, unsigned int workers,
default_quantum = DEFAULT_DEFAULT_QUANTUM;
manager->default_quantum = default_quantum;
INIT_LIST(manager->tasks);
- INIT_LIST(manager->ready_tasks);
- INIT_LIST(manager->ready_priority_tasks);
+ INIT_LIST(manager->ready_tasks[isc_taskqueue_normal]);
+ INIT_LIST(manager->ready_tasks[isc_taskqueue_slow]);
+ INIT_LIST(manager->ready_priority_tasks[isc_taskqueue_normal]);
+ INIT_LIST(manager->ready_priority_tasks[isc_taskqueue_slow]);
manager->tasks_running = 0;
manager->tasks_ready = 0;
manager->exclusive_requested = false;
@@ -1465,7 +1512,19 @@ isc__taskmgr_create(isc_mem_t *mctx, unsigned int workers,
* Start workers.
*/
for (i = 0; i < workers; i++) {
- if (isc_thread_create(run, manager,
+ if (isc_thread_create(run_normal, manager,
+ &manager->threads[manager->workers]) ==
+ ISC_R_SUCCESS) {
+ char name[21]; /* thread name limit on Linux */
+ snprintf(name, sizeof(name), "isc-worker%04u", i);
+ isc_thread_setname(manager->threads[manager->workers],
+ name);
+ manager->workers++;
+ started++;
+ }
+ }
+ for (; i < workers * 2; i++) {
+ if (isc_thread_create(run_slow, manager,
&manager->threads[manager->workers]) ==
ISC_R_SUCCESS) {
char name[21]; /* thread name limit on Linux */
@@ -1482,7 +1541,7 @@ isc__taskmgr_create(isc_mem_t *mctx, unsigned int workers,
manager_free(manager);
return (ISC_R_NOTHREADS);
}
- isc_thread_setconcurrency(workers);
+ isc_thread_setconcurrency(workers * 2);
#endif /* USE_WORKER_THREADS */
#ifdef USE_SHARED_MANAGER
manager->refs = 1;
@@ -1497,7 +1556,8 @@ isc__taskmgr_create(isc_mem_t *mctx, unsigned int workers,
cleanup_exclusivegranted:
(void)isc_condition_destroy(&manager->exclusive_granted);
cleanup_workavailable:
- (void)isc_condition_destroy(&manager->work_available);
+ (void)isc_condition_destroy(&manager->work_available[isc_taskqueue_slow]);
+ (void)isc_condition_destroy(&manager->work_available[isc_taskqueue_normal]);
cleanup_threads:
isc_mem_free(mctx, manager->threads);
cleanup_lock:
@@ -1582,7 +1642,7 @@ isc__taskmgr_destroy(isc_taskmgr_t **managerp) {
task = NEXT(task, link)) {
LOCK(&task->lock);
if (task_shutdown(task))
- push_readyq(manager, task);
+ push_readyq(manager, task, task->qid);
UNLOCK(&task->lock);
}
#ifdef USE_WORKER_THREADS
@@ -1591,7 +1651,8 @@ isc__taskmgr_destroy(isc_taskmgr_t **managerp) {
* there's work left to do, and if there are already no tasks left
* it will cause the workers to see manager->exiting.
*/
- BROADCAST(&manager->work_available);
+ BROADCAST(&manager->work_available[isc_taskqueue_normal]);
+ BROADCAST(&manager->work_available[isc_taskqueue_slow]);
UNLOCK(&manager->lock);
/*
@@ -1693,7 +1754,8 @@ isc__taskmgr_resume(isc_taskmgr_t *manager0) {
LOCK(&manager->lock);
if (manager->pause_requested) {
manager->pause_requested = false;
- BROADCAST(&manager->work_available);
+ BROADCAST(&manager->work_available[isc_taskqueue_normal]);
+ BROADCAST(&manager->work_available[isc_taskqueue_slow]);
}
UNLOCK(&manager->lock);
}
@@ -1778,7 +1840,8 @@ isc__task_endexclusive(isc_task_t *task0) {
LOCK(&manager->lock);
REQUIRE(manager->exclusive_requested);
manager->exclusive_requested = false;
- BROADCAST(&manager->work_available);
+ BROADCAST(&manager->work_available[isc_taskqueue_normal]);
+ BROADCAST(&manager->work_available[isc_taskqueue_slow]);
UNLOCK(&manager->lock);
#else
UNUSED(task0);
@@ -1804,10 +1867,10 @@ isc__task_setprivilege(isc_task_t *task0, bool priv) {
LOCK(&manager->lock);
if (priv && ISC_LINK_LINKED(task, ready_link))
- ENQUEUE(manager->ready_priority_tasks, task,
+ ENQUEUE(manager->ready_priority_tasks[task->qid], task,
ready_priority_link);
else if (!priv && ISC_LINK_LINKED(task, ready_priority_link))
- DEQUEUE(manager->ready_priority_tasks, task,
+ DEQUEUE(manager->ready_priority_tasks[task->qid], task,
ready_priority_link);
UNLOCK(&manager->lock);
}
--
2.43.2

View File

@ -0,0 +1,133 @@
From 0a7909045f9e1bf74c1f0fd561a8ef5f55481e8f Mon Sep 17 00:00:00 2001
From: Petr Mensik <pemensik@redhat.com>
Date: Mon, 29 Jul 2024 16:20:50 +0200
Subject: [PATCH] Allow global runtime definition by DNS_RBTDB_MAX_RTYPES
Modify rbtdb to not set it only at runtime, but allow setting that also
in runtime via environment variable. It is still possible to modify
default during the build define. In addition to it allows runtime change
also. Can be positive number to set limit, 0 disabled the check.
Similarly add also DNS_RDATASET_MAX_RECORDS to set maximum number of
records for a single name. This must be positive number, 0 is no accepted.
These replaces max-records-per-type and max-types-per-name in later
versions. But can be configured only by environment and can be
configured only globally, not in each view or zone.
---
lib/dns/rbtdb.c | 21 +++++++++++++++++++--
lib/dns/rdataslab.c | 24 ++++++++++++++++++++++--
2 files changed, 41 insertions(+), 4 deletions(-)
diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index a3cb8dc871..0104c3ee36 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -6320,15 +6320,29 @@ update_recordsandbytes(bool add, rbtdb_version_t *rbtversion,
#define DNS_RBTDB_MAX_RTYPES 100
#endif /* DNS_RBTDB_MAX_RTYPES */
+static uint32_t dns_g_rbtdb_max_rtypes = DNS_RBTDB_MAX_RTYPES;
+
+static void
+init_max_rtypes(void) {
+ /* Red Hat change, allow setting different max value by environment. */
+ const char *max = getenv("DNS_RBTDB_MAX_RTYPES");
+ if (max) {
+ char *endp = NULL;
+ long l = strtol(max, &endp, 10);
+ if (max != endp && endp && !*endp && l >= 0)
+ dns_g_rbtdb_max_rtypes = l;
+ }
+}
+
static bool
overmaxtype(dns_rbtdb_t *rbtdb, uint32_t ntypes) {
UNUSED(rbtdb);
- if (DNS_RBTDB_MAX_RTYPES == 0) {
+ if (dns_g_rbtdb_max_rtypes == 0) {
return (false);
}
- return (ntypes >= DNS_RBTDB_MAX_RTYPES);
+ return (ntypes >= dns_g_rbtdb_max_rtypes);
}
static bool
@@ -8831,6 +8845,8 @@ static dns_dbmethods_t cache_methods = {
getservestalettl
};
+static isc_once_t once_db = ISC_ONCE_INIT;
+
isc_result_t
#ifdef DNS_RBTDB_VERSION64
dns_rbtdb64_create
@@ -8850,6 +8866,7 @@ dns_rbtdb_create
/* Keep the compiler happy. */
UNUSED(driverarg);
+ RUNTIME_CHECK(isc_once_do(&once_db, init_max_rtypes) == ISC_R_SUCCESS);
rbtdb = isc_mem_get(mctx, sizeof(*rbtdb));
if (rbtdb == NULL)
diff --git a/lib/dns/rdataslab.c b/lib/dns/rdataslab.c
index 347b7d2ce8..9566f79671 100644
--- a/lib/dns/rdataslab.c
+++ b/lib/dns/rdataslab.c
@@ -17,6 +17,7 @@
#include <stdlib.h>
#include <isc/mem.h>
+#include <isc/once.h>
#include <isc/region.h>
#include <isc/string.h> /* Required for HP/UX (and others?) */
#include <isc/util.h>
@@ -119,6 +120,23 @@ fillin_offsets(unsigned char *offsetbase, unsigned int *offsettable,
#define DNS_RDATASET_MAX_RECORDS 100
#endif /* DNS_RDATASET_MAX_RECORDS */
+static unsigned int dns_g_rdataset_max_records = DNS_RDATASET_MAX_RECORDS;
+static isc_once_t once = ISC_ONCE_INIT;
+
+static void
+init_max_records(void) {
+ /* Red Hat change, allow setting different max value by environment. */
+ const char *max = getenv("DNS_RDATASET_MAX_RECORDS");
+ if (max) {
+ char *endp = NULL;
+ long l = strtol(max, &endp, 10);
+ if (max != endp && endp && !*endp && l > 0)
+ dns_g_rdataset_max_records = l;
+ }
+}
+
+
+
isc_result_t
dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
isc_region_t *region, unsigned int reservelen)
@@ -165,7 +183,9 @@ dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
return (ISC_R_SUCCESS);
}
- if (nitems > DNS_RDATASET_MAX_RECORDS) {
+ RUNTIME_CHECK(isc_once_do(&once, init_max_records) == ISC_R_SUCCESS);
+
+ if (nitems > dns_g_rdataset_max_records) {
return (DNS_R_TOOMANYRECORDS);
}
@@ -662,7 +682,7 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
#endif
INSIST(ocount > 0 && ncount > 0);
- if (ocount + ncount > DNS_RDATASET_MAX_RECORDS) {
+ if (ocount + ncount > dns_g_rdataset_max_records) {
return (DNS_R_TOOMANYRECORDS);
}
--
2.45.2

View File

@ -0,0 +1,317 @@
From 71df06e2bf3da31c5d542fb33dbda67b21537322 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Fri, 1 Mar 2024 08:26:07 +0100
Subject: [PATCH] [9.11][CVE-2024-1737] Add a limit to the number of RRs in
RRSets
Add a limit to the number of RRs in RRSets
Previously, the number of RRs in the RRSets were internally unlimited.
As the data structure that holds the RRs is just a linked list, and
there are places where we just walk through all of the RRs, adding an
RRSet with huge number of RRs inside would slow down processing of said
RRSets.
The fix for end-of-life branches make the limit compile-time only for
simplicity and the limit can be changed at the compile time by adding
following define to CFLAGS:
-DDNS_RDATASET_MAX_RECORDS=<limit>
(cherry picked from commit c5c4d00c38530390c9e1ae4c98b65fbbadfe9e5e)
(cherry picked from commit 7f705778af729ada7fec36ac4b456c73329bd996)
(cherry picked from commit b9b5485b22c364fb88c27aa04bad4c8f616da3fa)
Add a limit to the number of RR types for single name
Previously, the number of RR types for a single owner name was limited
only by the maximum number of the types (64k). As the data structure
that holds the RR types for the database node is just a linked list, and
there are places where we just walk through the whole list (again and
again), adding a large number of RR types for a single owner named with
would slow down processing of such name (database node).
Add a hard-coded limit (100) to cap the number of the RR types for a single
owner. The limit can be changed at the compile time by adding following
define to CFLAGS:
-DDNS_RBTDB_MAX_RTYPES=<limit>
(cherry picked from commit 538b843d84f49ba5125ff545e3d0cf1c8434a8f2)
(cherry picked from commit 3f10d6eff035702796ba82cd28b9f7cf9836e743)
Optimize the slabheader placement for certain RRTypes
Mark the infrastructure RRTypes as "priority" types and place them at
the beginning of the rdataslab header data graph. The non-priority
types either go right after the priority types (if any).
(cherry picked from commit 3ac482be7fd058d284e89873021339579fad0615)
(cherry picked from commit 23a4652346fb2877d6246b1eebaa967969dbde16)
[9.11][CVE-2024-1737 (part 2)] Be smarter about refusing to add many RR types to the database
Expand the list of the priority types
Add HTTPS, SVCB, SRV, PTR, NAPTR, DNSKEY and TXT records to the list of
the priority types that are put at the beginning of the slabheader list
for faster access and to avoid eviction when there are more types than
the max-types-per-name limit.
(cherry picked from commit b27c6bcce894786a8e082eafd59eccbf6f2731cb)
(cherry picked from commit 3e0a67e4bdb253dae3a03a45c1aa117239a3313d)
Be smarter about refusing to add many RR types to the database
Instead of outright refusing to add new RR types to the cache, be a bit
smarter:
1. If the new header type is in our priority list, we always add either
positive or negative entry at the beginning of the list.
2. If the new header type is negative entry, and we are over the limit,
we mark it as ancient immediately, so it gets evicted from the cache
as soon as possible.
3. Otherwise add the new header after the priority headers (or at the
head of the list).
4. If we are over the limit, evict the last entry on the normal header
list.
(cherry picked from commit 57cd34441a1b4ecc9874a4a106c2c95b8d7a3120)
(cherry picked from commit e4d7ce686bb38428eddc7e33b40057d68eca9a6e)
---
configure | 2 +-
configure.ac | 2 +-
lib/dns/rbtdb.c | 114 +++++++++++++++++++++++++++++++++++++++++++-
lib/dns/rdataslab.c | 12 +++++
4 files changed, 126 insertions(+), 4 deletions(-)
diff --git a/configure b/configure
index e060e9d..6421c9b 100755
--- a/configure
+++ b/configure
@@ -12189,7 +12189,7 @@ fi
XTARGETS=
case "$enable_developer" in
yes)
- STD_CDEFINES="$STD_CDEFINES -DISC_LIST_CHECKINIT=1"
+ STD_CDEFINES="$STD_CDEFINES -DISC_LIST_CHECKINIT=1 -DDNS_RDATASET_MAX_RECORDS=5000 -DDNS_RBTDB_MAX_RTYPES=5000"
test "${enable_fixed_rrset+set}" = set || enable_fixed_rrset=yes
test "${enable_querytrace+set}" = set || enable_querytrace=yes
test "${enable_filter_aaaa+set}" = set || enable_filter_aaaa=yes
diff --git a/configure.ac b/configure.ac
index 83cad4a..1c35ce9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -100,7 +100,7 @@ AC_ARG_ENABLE(developer,
XTARGETS=
case "$enable_developer" in
yes)
- STD_CDEFINES="$STD_CDEFINES -DISC_LIST_CHECKINIT=1"
+ STD_CDEFINES="$STD_CDEFINES -DISC_LIST_CHECKINIT=1 -DDNS_RDATASET_MAX_RECORDS=5000 -DDNS_RBTDB_MAX_RTYPES=5000"
test "${enable_fixed_rrset+set}" = set || enable_fixed_rrset=yes
test "${enable_querytrace+set}" = set || enable_querytrace=yes
test "${enable_filter_aaaa+set}" = set || enable_filter_aaaa=yes
diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index ee59c1b..a2b2df7 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -1183,6 +1183,44 @@ set_ttl(dns_rbtdb_t *rbtdb, rdatasetheader_t *header, dns_ttl_t newttl) {
isc_heap_decreased(heap, header->heap_index);
}
+static bool
+prio_type(rbtdb_rdatatype_t type) {
+ switch (type) {
+ case dns_rdatatype_soa:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_soa):
+ case dns_rdatatype_a:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_a):
+ case dns_rdatatype_mx:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_mx):
+ case dns_rdatatype_aaaa:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_aaaa):
+ case dns_rdatatype_nsec:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_nsec):
+ case dns_rdatatype_nsec3:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_nsec3):
+ case dns_rdatatype_ns:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_ns):
+ case dns_rdatatype_ds:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_ds):
+ case dns_rdatatype_cname:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_cname):
+ case dns_rdatatype_dname:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_dname):
+ case dns_rdatatype_dnskey:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_dnskey):
+ case dns_rdatatype_srv:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_srv):
+ case dns_rdatatype_txt:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_txt):
+ case dns_rdatatype_ptr:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_ptr):
+ case dns_rdatatype_naptr:
+ case RBTDB_RDATATYPE_VALUE(dns_rdatatype_rrsig, dns_rdatatype_naptr):
+ return (true);
+ }
+ return (false);
+}
+
/*%
* These functions allow the heap code to rank the priority of each
* element. It returns true if v1 happens "sooner" than v2.
@@ -6278,6 +6316,30 @@ update_recordsandbytes(bool add, rbtdb_version_t *rbtversion,
RWUNLOCK(&rbtversion->rwlock, isc_rwlocktype_write);
}
+#ifndef DNS_RBTDB_MAX_RTYPES
+#define DNS_RBTDB_MAX_RTYPES 100
+#endif /* DNS_RBTDB_MAX_RTYPES */
+
+static bool
+overmaxtype(dns_rbtdb_t *rbtdb, uint32_t ntypes) {
+ UNUSED(rbtdb);
+
+ if (DNS_RBTDB_MAX_RTYPES == 0) {
+ return (false);
+ }
+
+ return (ntypes >= DNS_RBTDB_MAX_RTYPES);
+}
+
+static bool
+prio_header(rdatasetheader_t *header) {
+ if (NEGATIVE(header) && prio_type(RBTDB_RDATATYPE_EXT(header->type))) {
+ return (true);
+ }
+
+ return (prio_type(header->type));
+}
+
/*
* write lock on rbtnode must be held.
*/
@@ -6288,6 +6350,7 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
{
rbtdb_changed_t *changed = NULL;
rdatasetheader_t *topheader, *topheader_prev, *header, *sigheader;
+ rdatasetheader_t *prioheader = NULL, *expireheader = NULL;
unsigned char *merged;
isc_result_t result;
bool header_nx;
@@ -6297,6 +6360,7 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
rbtdb_rdatatype_t negtype, sigtype;
dns_trust_t trust;
int idx;
+ uint32_t ntypes = 0;
/*
* Add an rdatasetheader_t to a node.
@@ -6429,6 +6493,15 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
for (topheader = rbtnode->data;
topheader != NULL;
topheader = topheader->next) {
+ if (IS_CACHE(rbtdb) && ACTIVE(topheader, now)) {
+ ++ntypes;
+ expireheader = topheader;
+ } else if (!IS_CACHE(rbtdb)) {
+ ++ntypes;
+ }
+ if (prio_header(topheader)) {
+ prioheader = topheader;
+ }
if (topheader->type == newheader->type ||
topheader->type == negtype)
break;
@@ -6792,9 +6865,46 @@ add32(dns_rbtdb_t *rbtdb, dns_rbtnode_t *rbtnode, rbtdb_version_t *rbtversion,
/*
* No rdatasets of the given type exist at the node.
*/
- newheader->next = rbtnode->data;
+ if (!IS_CACHE(rbtdb) && overmaxtype(rbtdb, ntypes)) {
+ free_rdataset(rbtdb, rbtdb->common.mctx,
+ newheader);
+ return (ISC_R_QUOTA);
+ }
+
newheader->down = NULL;
- rbtnode->data = newheader;
+
+ if (prio_header(newheader)) {
+ /* This is a priority type, prepend it */
+ newheader->next = rbtnode->data;
+ rbtnode->data = newheader;
+ } else if (prioheader != NULL) {
+ /* Append after the priority headers */
+ newheader->next = prioheader->next;
+ prioheader->next = newheader;
+ } else {
+ /* There were no priority headers */
+ newheader->next = rbtnode->data;
+ rbtnode->data = newheader;
+ }
+
+ if (IS_CACHE(rbtdb) && overmaxtype(rbtdb, ntypes)) {
+ if (expireheader == NULL) {
+ expireheader = newheader;
+ }
+ if (NEGATIVE(newheader) &&
+ !prio_header(newheader))
+ {
+ /*
+ * Add the new non-priority negative
+ * header to the database only
+ * temporarily.
+ */
+ expireheader = newheader;
+ }
+
+ set_ttl(rbtdb, expireheader, 0);
+ mark_header_ancient(rbtdb, expireheader);
+ }
}
}
diff --git a/lib/dns/rdataslab.c b/lib/dns/rdataslab.c
index b0f77b1..347b7d2 100644
--- a/lib/dns/rdataslab.c
+++ b/lib/dns/rdataslab.c
@@ -115,6 +115,10 @@ fillin_offsets(unsigned char *offsetbase, unsigned int *offsettable,
}
#endif
+#ifndef DNS_RDATASET_MAX_RECORDS
+#define DNS_RDATASET_MAX_RECORDS 100
+#endif /* DNS_RDATASET_MAX_RECORDS */
+
isc_result_t
dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
isc_region_t *region, unsigned int reservelen)
@@ -161,6 +165,10 @@ dns_rdataslab_fromrdataset(dns_rdataset_t *rdataset, isc_mem_t *mctx,
return (ISC_R_SUCCESS);
}
+ if (nitems > DNS_RDATASET_MAX_RECORDS) {
+ return (DNS_R_TOOMANYRECORDS);
+ }
+
if (nitems > 0xffff)
return (ISC_R_NOSPACE);
@@ -654,6 +662,10 @@ dns_rdataslab_merge(unsigned char *oslab, unsigned char *nslab,
#endif
INSIST(ocount > 0 && ncount > 0);
+ if (ocount + ncount > DNS_RDATASET_MAX_RECORDS) {
+ return (DNS_R_TOOMANYRECORDS);
+ }
+
#if DNS_RDATASET_FIXED
oncount = ncount;
#endif
--
2.45.2

View File

@ -0,0 +1,322 @@
From 5ff88892e43c049659a8a5aef8dfd56c3712daf0 Mon Sep 17 00:00:00 2001
From: Petr Mensik <pemensik@redhat.com>
Date: Tue, 16 Jul 2024 19:49:09 +0200
Subject: [PATCH] Resolve CVE-2024-1975
6404. [security] Remove SIG(0) support from named as a countermeasure
for CVE-2024-1975. [GL #4480]
Resolves: CVE-2024-1975
---
bin/named/client.c | 7 +++
bin/tests/system/tsiggss/authsock.pl | 5 ++
bin/tests/system/tsiggss/tests.sh | 12 ++--
bin/tests/system/upforwd/tests.sh | 21 ++++---
doc/arm/Bv9ARM-book.xml | 22 +++----
lib/dns/message.c | 94 +++-------------------------
6 files changed, 49 insertions(+), 112 deletions(-)
diff --git a/bin/named/client.c b/bin/named/client.c
index 368bc94..ea121b3 100644
--- a/bin/named/client.c
+++ b/bin/named/client.c
@@ -3013,6 +3013,13 @@ client_request(isc_task_t *task, isc_event_t *event) {
ns_client_log(client, DNS_LOGCATEGORY_SECURITY,
NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(3),
"request is signed by a nonauthoritative key");
+ } else if (result == DNS_R_NOTVERIFIEDYET &&
+ client->message->sig0 != NULL)
+ {
+ ns_client_log(client, DNS_LOGCATEGORY_SECURITY,
+ NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(3),
+ "request has a SIG(0) signature but its support "
+ "was removed (CVE-2024-1975)");
} else {
char tsigrcode[64];
isc_buffer_t b;
diff --git a/bin/tests/system/tsiggss/authsock.pl b/bin/tests/system/tsiggss/authsock.pl
index ab3833d..0b231ee 100644
--- a/bin/tests/system/tsiggss/authsock.pl
+++ b/bin/tests/system/tsiggss/authsock.pl
@@ -31,6 +31,10 @@ if (!defined($path)) {
exit(1);
}
+# Enable output autoflush so that it's not lost when the parent sends TERM.
+select STDOUT;
+$| = 1;
+
unlink($path);
my $server = IO::Socket::UNIX->new(Local => $path, Type => SOCK_STREAM, Listen => 8) or
die "unable to create socket $path";
@@ -53,6 +57,7 @@ if ($timeout != 0) {
}
while (my $client = $server->accept()) {
+ printf("accept()\n");
$client->recv(my $buf, 8, 0);
my ($version, $req_len) = unpack('N N', $buf);
diff --git a/bin/tests/system/tsiggss/tests.sh b/bin/tests/system/tsiggss/tests.sh
index 456ce61..d0db388 100644
--- a/bin/tests/system/tsiggss/tests.sh
+++ b/bin/tests/system/tsiggss/tests.sh
@@ -116,7 +116,7 @@ status=$((status+ret))
echo_i "testing external update policy (CNAME) with auth sock ($n)"
ret=0
-$PERL ./authsock.pl --type=CNAME --path=ns1/auth.sock --pidfile=authsock.pid --timeout=120 > /dev/null 2>&1 &
+$PERL ./authsock.pl --type=CNAME --path=ns1/auth.sock --pidfile=authsock.pid --timeout=120 >authsock.log 2>&1 &
sleep 1
test_update $n testcname.example.nil. CNAME "86400 CNAME testdenied.example.nil" "testdenied" || ret=1
n=$((n+1))
@@ -130,17 +130,19 @@ n=$((n+1))
if [ "$ret" -ne 0 ]; then echo_i "failed"; fi
status=$((status+ret))
-echo_i "testing external policy with SIG(0) key ($n)"
+echo_i "testing external policy with unsupported SIG(0) key ($n)"
ret=0
-$NSUPDATE -R $RANDFILE -k ns1/Kkey.example.nil.*.private <<END > /dev/null 2>&1 || ret=1
+$NSUPDATE -R $RANDFILE -k ns1/Kkey.example.nil.*.private <<END >nsupdate.out${n} 2>&1 || true
+debug
server 10.53.0.1 ${PORT}
zone example.nil
update add fred.example.nil 120 cname foo.bar.
send
END
+# update must have failed - SIG(0) signer is not supported
output=`$DIG $DIGOPTS +short cname fred.example.nil.`
-[ -n "$output" ] || ret=1
-[ $ret -eq 0 ] || echo_i "failed"
+[ -n "$output" ] && ret=1
+grep -F "signer=key.example.nil" authsock.log >/dev/null && ret=1
n=$((n+1))
if [ "$ret" -ne 0 ]; then echo_i "failed"; fi
status=$((status+ret))
diff --git a/bin/tests/system/upforwd/tests.sh b/bin/tests/system/upforwd/tests.sh
index ebc9ded..f5b89d4 100644
--- a/bin/tests/system/upforwd/tests.sh
+++ b/bin/tests/system/upforwd/tests.sh
@@ -181,19 +181,22 @@ n=`expr $n + 1`
if test -f keyname
then
- echo_i "checking update forwarding to with sig0 ($n)"
+ echo_i "checking update forwarding to with sig0 (expected to fail) ($n)"
ret=0
keyname=`cat keyname`
- $NSUPDATE -k $keyname.private -- - <<EOF
- local 10.53.0.1
- server 10.53.0.3 ${PORT}
- zone example2
- update add unsigned.example2. 600 A 10.10.10.1
- update add unsigned.example2. 600 TXT Foo
- send
+ # SIG(0) is removed, update is expected to fail.
+ {
+ $NSUPDATE -k $keyname.private -- - <<EOF
+ local 10.53.0.1
+ server 10.53.0.3 ${PORT}
+ zone example2
+ update add unsigned.example2. 600 A 10.10.10.1
+ update add unsigned.example2. 600 TXT Foo
+ send
EOF
+ } >nsupdate.out.$n 2>&1 && ret=1
$DIG -p ${PORT} unsigned.example2 A @10.53.0.1 > dig.out.ns1.test$n
- grep "status: NOERROR" dig.out.ns1.test$n > /dev/null || ret=1
+ grep "status: NOERROR" dig.out.ns1.test$n >/dev/null && ret=1
if [ $ret != 0 ] ; then echo_i "failed"; fi
status=`expr $status + $ret`
n=`expr $n + 1`
diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index acf772b..563dced 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -2027,7 +2027,7 @@ allow-update { !{ !localnets; any; }; key host1-host2. ;};
The TKEY process is initiated by a client or server by sending
a query of type TKEY to a TKEY-aware server. The query must include
an appropriate KEY record in the additional section, and
- must be signed using either TSIG or SIG(0) with a previously
+ must be signed using TSIG with a previously
established key. The server's response, if successful,
contains a TKEY record in its answer section. After this transaction,
both participants have enough information to calculate a
@@ -2050,24 +2050,24 @@ allow-update { !{ !localnets; any; }; key host1-host2. ;};
<section xml:id="sig0"><info><title>SIG(0)</title></info>
<para>
- <acronym>BIND</acronym> partially supports DNSSEC SIG(0)
+ <acronym>BIND</acronym> partially supported DNSSEC SIG(0)
transaction signatures as specified in RFC 2535 and RFC 2931.
SIG(0) uses public/private keys to authenticate messages. Access control
- is performed in the same manner as with TSIG keys; privileges can be
+ were performed in the same manner as with TSIG keys; privileges can be
granted or denied in ACL directives based on the key name.
</para>
<para>
- When a SIG(0) signed message is received, it is only
+ When a SIG(0) signed message were received, it were only
verified if the key is known and trusted by the server. The
- server does not attempt to recursively fetch or validate the
+ server did not attempt to recursively fetch or validate the
key.
</para>
<para>
- SIG(0) signing of multiple-message TCP streams is not supported.
+ SIG(0) signing of multiple-message TCP streams were not supported.
</para>
<para>
- The only tool shipped with <acronym>BIND</acronym> 9 that
- generates SIG(0) signed messages is <command>nsupdate</command>.
+ Support for SIG(0) message verification was removed
+ as part of the mitigation of CVE-2024-1975.
</para>
</section>
@@ -12655,7 +12655,7 @@ example.com. NS ns2.example.net.
either grants or denies permission for one or more
names in the zone to be updated by one or more
identities. Identity is determined by the key that
- signed the update request, using either TSIG or SIG(0).
+ signed the update request, using TSIG.
In most cases, <command>update-policy</command> rules
only apply to key-based identities. There is no way
to specify update permissions based on client source
@@ -12742,7 +12742,7 @@ example.com. NS ns2.example.net.
<para>
The <command>identity</command> field must be set to
a fully qualified domain name. In most cases, this
- represents the name of the TSIG or SIG(0) key that must be
+ represents the name of the TSIG key that must be
used to sign the update request. If the specified name is a
wildcard, it is subject to DNS wildcard expansion, and the
rule may apply to multiple identities. When a TKEY exchange
@@ -15952,7 +15952,7 @@ HOST-127.EXAMPLE. MX 0 .
</para>
<para>
ACLs match clients on the basis of up to three characteristics:
- 1) The client's IP address; 2) the TSIG or SIG(0) key that was
+ 1) The client's IP address; 2) the TSIG key that was
used to sign the request, if any; and 3) an address prefix
encoded in an EDNS Client-Subnet option, if any.
</para>
diff --git a/lib/dns/message.c b/lib/dns/message.c
index a44eb2d..9ea2b9e 100644
--- a/lib/dns/message.c
+++ b/lib/dns/message.c
@@ -3373,103 +3373,23 @@ dns_message_dumpsig(dns_message_t *msg, char *txt1) {
isc_result_t
dns_message_checksig(dns_message_t *msg, dns_view_t *view) {
- isc_buffer_t b, msgb;
+ isc_buffer_t msgb;
REQUIRE(DNS_MESSAGE_VALID(msg));
- if (msg->tsigkey == NULL && msg->tsig == NULL && msg->sig0 == NULL)
+ if (msg->tsigkey == NULL && msg->tsig == NULL)
return (ISC_R_SUCCESS);
INSIST(msg->saved.base != NULL);
isc_buffer_init(&msgb, msg->saved.base, msg->saved.length);
isc_buffer_add(&msgb, msg->saved.length);
- if (msg->tsigkey != NULL || msg->tsig != NULL) {
#ifdef SKAN_MSG_DEBUG
- dns_message_dumpsig(msg, "dns_message_checksig#1");
+ dns_message_dumpsig(msg, "dns_message_checksig#1");
#endif
- if (view != NULL)
- return (dns_view_checksig(view, &msgb, msg));
- else
- return (dns_tsig_verify(&msgb, msg, NULL, NULL));
- } else {
- dns_rdata_t rdata = DNS_RDATA_INIT;
- dns_rdata_sig_t sig;
- dns_rdataset_t keyset;
- isc_result_t result;
-
- result = dns_rdataset_first(msg->sig0);
- INSIST(result == ISC_R_SUCCESS);
- dns_rdataset_current(msg->sig0, &rdata);
-
- /*
- * This can occur when the message is a dynamic update, since
- * the rdata length checking is relaxed. This should not
- * happen in a well-formed message, since the SIG(0) is only
- * looked for in the additional section, and the dynamic update
- * meta-records are in the prerequisite and update sections.
- */
- if (rdata.length == 0)
- return (ISC_R_UNEXPECTEDEND);
-
- result = dns_rdata_tostruct(&rdata, &sig, msg->mctx);
- if (result != ISC_R_SUCCESS)
- return (result);
-
- dns_rdataset_init(&keyset);
- if (view == NULL)
- return (DNS_R_KEYUNAUTHORIZED);
- result = dns_view_simplefind(view, &sig.signer,
- dns_rdatatype_key /* SIG(0) */,
- 0, 0, false, &keyset, NULL);
-
- if (result != ISC_R_SUCCESS) {
- /* XXXBEW Should possibly create a fetch here */
- result = DNS_R_KEYUNAUTHORIZED;
- goto freesig;
- } else if (keyset.trust < dns_trust_secure) {
- /* XXXBEW Should call a validator here */
- result = DNS_R_KEYUNAUTHORIZED;
- goto freesig;
- }
- result = dns_rdataset_first(&keyset);
- INSIST(result == ISC_R_SUCCESS);
- for (;
- result == ISC_R_SUCCESS;
- result = dns_rdataset_next(&keyset))
- {
- dst_key_t *key = NULL;
-
- dns_rdata_reset(&rdata);
- dns_rdataset_current(&keyset, &rdata);
- isc_buffer_init(&b, rdata.data, rdata.length);
- isc_buffer_add(&b, rdata.length);
-
- result = dst_key_fromdns(&sig.signer, rdata.rdclass,
- &b, view->mctx, &key);
- if (result != ISC_R_SUCCESS)
- continue;
- if (dst_key_alg(key) != sig.algorithm ||
- dst_key_id(key) != sig.keyid ||
- !(dst_key_proto(key) == DNS_KEYPROTO_DNSSEC ||
- dst_key_proto(key) == DNS_KEYPROTO_ANY))
- {
- dst_key_free(&key);
- continue;
- }
- result = dns_dnssec_verifymessage(&msgb, msg, key);
- dst_key_free(&key);
- if (result == ISC_R_SUCCESS)
- break;
- }
- if (result == ISC_R_NOMORE)
- result = DNS_R_KEYUNAUTHORIZED;
-
- freesig:
- if (dns_rdataset_isassociated(&keyset))
- dns_rdataset_disassociate(&keyset);
- dns_rdata_freestruct(&sig);
- return (result);
- }
+ if (view != NULL)
+ return (dns_view_checksig(view, &msgb, msg));
+ else
+ return (dns_tsig_verify(&msgb, msg, NULL, NULL));
}
#define INDENT(sp) \
--
2.45.2

View File

@ -0,0 +1,65 @@
From 8a7bff93037432fcfe8532752e89f150ea3030a4 Mon Sep 17 00:00:00 2001
From: Petr Mensik <pemensik@redhat.com>
Date: Mon, 9 Oct 2023 19:00:12 +0200
Subject: [PATCH] Do not keep stale records by default
By default set max-stale-ttl to 0, unless stale-answer-enable yes. This
were enabled by mistake when backporting fix for CVE-2023-2828. It
causes increased cache usage on servers not wanting to serve stale
records. Fix that by setting smart defaults based on stale answers
enabled with possible manual tuning.
---
bin/named/server.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/bin/named/server.c b/bin/named/server.c
index 7af90d0..afdc4fa 100644
--- a/bin/named/server.c
+++ b/bin/named/server.c
@@ -3295,7 +3295,7 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
size_t max_acache_size;
size_t max_adb_size;
uint32_t lame_ttl, fail_ttl;
- uint32_t max_stale_ttl;
+ uint32_t max_stale_ttl = 0;
dns_tsig_keyring_t *ring = NULL;
dns_view_t *pview = NULL; /* Production view */
isc_mem_t *cmctx = NULL, *hmctx = NULL;
@@ -3739,16 +3739,29 @@ configure_view(dns_view_t *view, dns_viewlist_t *viewlist,
if (view->maxncachettl > 7 * 24 * 3600)
view->maxncachettl = 7 * 24 * 3600;
- obj = NULL;
- result = ns_config_get(maps, "max-stale-ttl", &obj);
- INSIST(result == ISC_R_SUCCESS);
- max_stale_ttl = cfg_obj_asuint32(obj);
-
obj = NULL;
result = ns_config_get(maps, "stale-answer-enable", &obj);
INSIST(result == ISC_R_SUCCESS);
view->staleanswersenable = cfg_obj_asboolean(obj);
+ // RHEL-11785 -- set the stale-ttl to non-zero value only if enabled
+ obj = NULL;
+ if (view->staleanswersenable) {
+ result = ns_config_get(maps, "max-stale-ttl", &obj);
+ INSIST(result == ISC_R_SUCCESS);
+ max_stale_ttl = cfg_obj_asuint32(obj);
+ /*
+ * If 'stale-answer-enable' is false, max_stale_ttl is set
+ * to 0, meaning keeping stale RRsets in cache is disabled.
+ */
+ } else {
+ /* Do not use default value if stale is disabled,
+ * but allow manual overriding, like 'stale-cache-enable' */
+ result = ns_config_get(optionmaps, "max-stale-ttl", &obj);
+ if (result == ISC_R_SUCCESS)
+ max_stale_ttl = cfg_obj_asuint32(obj);
+ }
+
result = dns_viewlist_find(&ns_g_server->viewlist, view->name,
view->rdclass, &pview);
if (result == ISC_R_SUCCESS) {
--
2.41.0

View File

@ -0,0 +1,166 @@
From 3883ec072e5feed1237dc864854ab95ded7302d6 Mon Sep 17 00:00:00 2001
From: Petr Mensik <pemensik@redhat.com>
Date: Tue, 19 Sep 2023 13:14:52 +0200
Subject: [PATCH] Backport of CVE-2023-3341 fix
Taken from BIND 9.16.44 change.
---
lib/isccc/cc.c | 36 +++++++++++++++++++++++---------
lib/isccc/include/isccc/result.h | 4 +++-
lib/isccc/result.c | 4 +++-
3 files changed, 32 insertions(+), 12 deletions(-)
diff --git a/lib/isccc/cc.c b/lib/isccc/cc.c
index 463a053..a54e60c 100644
--- a/lib/isccc/cc.c
+++ b/lib/isccc/cc.c
@@ -53,6 +53,10 @@
#define MAX_TAGS 256
#define DUP_LIFETIME 900
+#ifndef ISCCC_MAXDEPTH
+#define ISCCC_MAXDEPTH \
+ 10 /* Big enough for rndc which just sends a string each way. */
+#endif
typedef isccc_sexpr_t *sexpr_ptr;
@@ -573,19 +577,23 @@ verify(isccc_sexpr_t *alist, unsigned char *data, unsigned int length,
static isc_result_t
table_fromwire(isccc_region_t *source, isccc_region_t *secret,
- uint32_t algorithm, isccc_sexpr_t **alistp);
+ uint32_t algorithm, unsigned int depth, isccc_sexpr_t **alistp);
static isc_result_t
-list_fromwire(isccc_region_t *source, isccc_sexpr_t **listp);
+list_fromwire(isccc_region_t *source, unsigned int depth, isccc_sexpr_t **listp);
static isc_result_t
-value_fromwire(isccc_region_t *source, isccc_sexpr_t **valuep) {
+value_fromwire(isccc_region_t *source, unsigned int depth, isccc_sexpr_t **valuep) {
unsigned int msgtype;
uint32_t len;
isccc_sexpr_t *value;
isccc_region_t active;
isc_result_t result;
+ if (depth > ISCCC_MAXDEPTH) {
+ return (ISCCC_R_MAXDEPTH);
+ }
+
if (REGION_SIZE(*source) < 1 + 4)
return (ISC_R_UNEXPECTEDEND);
GET8(msgtype, source->rstart);
@@ -603,9 +611,9 @@ value_fromwire(isccc_region_t *source, isccc_sexpr_t **valuep) {
} else
result = ISC_R_NOMEMORY;
} else if (msgtype == ISCCC_CCMSGTYPE_TABLE)
- result = table_fromwire(&active, NULL, 0, valuep);
+ result = table_fromwire(&active, NULL, 0, depth + 1, valuep);
else if (msgtype == ISCCC_CCMSGTYPE_LIST)
- result = list_fromwire(&active, valuep);
+ result = list_fromwire(&active, depth + 1, valuep);
else
result = ISCCC_R_SYNTAX;
@@ -614,7 +622,7 @@ value_fromwire(isccc_region_t *source, isccc_sexpr_t **valuep) {
static isc_result_t
table_fromwire(isccc_region_t *source, isccc_region_t *secret,
- uint32_t algorithm, isccc_sexpr_t **alistp)
+ uint32_t algorithm, unsigned int depth, isccc_sexpr_t **alistp)
{
char key[256];
uint32_t len;
@@ -625,6 +633,10 @@ table_fromwire(isccc_region_t *source, isccc_region_t *secret,
REQUIRE(alistp != NULL && *alistp == NULL);
+ if (depth > ISCCC_MAXDEPTH) {
+ return (ISCCC_R_MAXDEPTH);
+ }
+
checksum_rstart = NULL;
first_tag = true;
alist = isccc_alist_create();
@@ -640,7 +652,7 @@ table_fromwire(isccc_region_t *source, isccc_region_t *secret,
GET_MEM(key, len, source->rstart);
key[len] = '\0'; /* Ensure NUL termination. */
value = NULL;
- result = value_fromwire(source, &value);
+ result = value_fromwire(source, depth + 1, &value);
if (result != ISC_R_SUCCESS)
goto bad;
if (isccc_alist_define(alist, key, value) == NULL) {
@@ -673,14 +685,18 @@ table_fromwire(isccc_region_t *source, isccc_region_t *secret,
}
static isc_result_t
-list_fromwire(isccc_region_t *source, isccc_sexpr_t **listp) {
+list_fromwire(isccc_region_t *source, unsigned int depth, isccc_sexpr_t **listp) {
isccc_sexpr_t *list, *value;
isc_result_t result;
+ if (depth > ISCCC_MAXDEPTH) {
+ return (ISCCC_R_MAXDEPTH);
+ }
+
list = NULL;
while (!REGION_EMPTY(*source)) {
value = NULL;
- result = value_fromwire(source, &value);
+ result = value_fromwire(source, depth + 1, &value);
if (result != ISC_R_SUCCESS) {
isccc_sexpr_free(&list);
return (result);
@@ -711,7 +727,7 @@ isccc_cc_fromwire(isccc_region_t *source, isccc_sexpr_t **alistp,
if (version != 1)
return (ISCCC_R_UNKNOWNVERSION);
- return (table_fromwire(source, secret, algorithm, alistp));
+ return (table_fromwire(source, secret, algorithm, 0, alistp));
}
static isc_result_t
diff --git a/lib/isccc/include/isccc/result.h b/lib/isccc/include/isccc/result.h
index 6c79dd7..b30b08a 100644
--- a/lib/isccc/include/isccc/result.h
+++ b/lib/isccc/include/isccc/result.h
@@ -47,8 +47,10 @@
#define ISCCC_R_CLOCKSKEW (ISC_RESULTCLASS_ISCCC + 4)
/*% Duplicate */
#define ISCCC_R_DUPLICATE (ISC_RESULTCLASS_ISCCC + 5)
+/*% Maximum recursion depth */
+#define ISCCC_R_MAXDEPTH (ISC_RESULTCLASS_ISCCC + 6)
-#define ISCCC_R_NRESULTS 6 /*%< Number of results */
+#define ISCCC_R_NRESULTS 7 /*%< Number of results */
ISC_LANG_BEGINDECLS
diff --git a/lib/isccc/result.c b/lib/isccc/result.c
index 8419bbb..a3a3b9a 100644
--- a/lib/isccc/result.c
+++ b/lib/isccc/result.c
@@ -40,7 +40,8 @@ static const char *text[ISCCC_R_NRESULTS] = {
"bad auth", /* 3 */
"expired", /* 4 */
"clock skew", /* 5 */
- "duplicate" /* 6 */
+ "duplicate", /* 6 */
+ "max depth", /* 7 */
};
static const char *ids[ISCCC_R_NRESULTS] = {
@@ -50,6 +51,7 @@ static const char *ids[ISCCC_R_NRESULTS] = {
"ISCCC_R_EXPIRED",
"ISCCC_R_CLOCKSKEW",
"ISCCC_R_DUPLICATE",
+ "ISCCC_R_MAXDEPTH"
};
#define ISCCC_RESULT_RESULTSET 2
--
2.41.0

View File

@ -0,0 +1,31 @@
From 4e595a6b961e73af43350833109ccba0950119f9 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Thu, 12 Oct 2023 10:19:38 +1100
Subject: [PATCH] Update b.root-servers.net IP addresses
This covers both root hints and the default primaries for the root
zone mirror. The official change date is Nov 27, 2023.
(cherry picked from commit 2ca2f7e9852a3d6e93f065c01ea4679f723688f7)
---
lib/dns/rootns.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/dns/rootns.c b/lib/dns/rootns.c
index 9653f3b..d6ff76e 100644
--- a/lib/dns/rootns.c
+++ b/lib/dns/rootns.c
@@ -56,8 +56,8 @@ static char root_ns[] =
". 518400 IN NS M.ROOT-SERVERS.NET.\n"
"A.ROOT-SERVERS.NET. 3600000 IN A 198.41.0.4\n"
"A.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:503:BA3E::2:30\n"
-"B.ROOT-SERVERS.NET. 3600000 IN A 199.9.14.201\n"
-"B.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:200::b\n"
+"B.ROOT-SERVERS.NET. 3600000 IN A 170.247.170.2\n"
+"B.ROOT-SERVERS.NET. 3600000 IN AAAA 2801:1b8:10::b\n"
"C.ROOT-SERVERS.NET. 3600000 IN A 192.33.4.12\n"
"C.ROOT-SERVERS.NET. 3600000 IN AAAA 2001:500:2::c\n"
"D.ROOT-SERVERS.NET. 3600000 IN A 199.7.91.13\n"
--
2.43.0

0
SOURCES/generate-rndc-key.sh Executable file → Normal file
View File

View File

@ -1,13 +1,13 @@
; <<>> DiG 9.11.3-RedHat-9.11.3-3.fc27 <<>> +bufsize=1200 +norec @a.root-servers.net
; (2 servers found)
; <<>> DiG 9.18.20 <<>> -4 +tcp +norec +nostats @d.root-servers.net
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46900
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47286
;; flags: qr aa; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 27
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
; EDNS: version: 0, flags:; udp: 1450
;; QUESTION SECTION:
;. IN NS
@ -28,7 +28,7 @@
;; ADDITIONAL SECTION:
a.root-servers.net. 518400 IN A 198.41.0.4
b.root-servers.net. 518400 IN A 199.9.14.201
b.root-servers.net. 518400 IN A 170.247.170.2
c.root-servers.net. 518400 IN A 192.33.4.12
d.root-servers.net. 518400 IN A 199.7.91.13
e.root-servers.net. 518400 IN A 192.203.230.10
@ -41,7 +41,7 @@ k.root-servers.net. 518400 IN A 193.0.14.129
l.root-servers.net. 518400 IN A 199.7.83.42
m.root-servers.net. 518400 IN A 202.12.27.33
a.root-servers.net. 518400 IN AAAA 2001:503:ba3e::2:30
b.root-servers.net. 518400 IN AAAA 2001:500:200::b
b.root-servers.net. 518400 IN AAAA 2801:1b8:10::b
c.root-servers.net. 518400 IN AAAA 2001:500:2::c
d.root-servers.net. 518400 IN AAAA 2001:500:2d::d
e.root-servers.net. 518400 IN AAAA 2001:500:a8::e
@ -54,8 +54,3 @@ k.root-servers.net. 518400 IN AAAA 2001:7fd::1
l.root-servers.net. 518400 IN AAAA 2001:500:9f::42
m.root-servers.net. 518400 IN AAAA 2001:dc3::35
;; Query time: 24 msec
;; SERVER: 198.41.0.4#53(198.41.0.4)
;; WHEN: Thu Apr 05 15:57:34 CEST 2018
;; MSG SIZE rcvd: 811

0
SOURCES/setup-named-chroot.sh Executable file → Normal file
View File

0
SOURCES/setup-named-softhsm.sh Executable file → Normal file
View File

View File

@ -68,7 +68,7 @@ Summary: The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
Name: bind
License: MPLv2.0
Version: 9.11.36
Release: 9%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}
Release: 16%{?PATCHVER:.%{PATCHVER}}%{?PREVER:.%{PREVER}}%{?dist}.2
Epoch: 32
Url: https://www.isc.org/downloads/bind/
#
@ -172,6 +172,31 @@ Patch193: bind-9.16-CVE-2022-3094-1.patch
Patch194: bind-9.16-CVE-2022-3094-2.patch
Patch195: bind-9.16-CVE-2022-3094-3.patch
Patch196: bind-9.16-CVE-2022-3094-test.patch
# https://gitlab.isc.org/isc-projects/bind9/commit/f1d9e9ee3859976f403914d20ad2a10855343702
Patch197: bind-9.11-CVE-2023-2828.patch
Patch198: bind-9.16-CVE-2023-3341.patch
# https://issues.redhat.com/browse/RHEL-11785, downstream
Patch199: bind-9.11-stale-cache.patch
# https://gitlab.isc.org/isc-projects/bind9/commit/8924adca613ca9daea63786563cce6fdbd742c56
Patch200: bind-9.16-update-b.root-servers.net.patch
# https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/8768
Patch201: bind-9.11-CVE-2023-4408.patch
# https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/8769
Patch202: bind-9.11-CVE-2023-50387.patch
# https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/8778
Patch203: bind-9.11-CVE-2023-2828-fixup.patch
# addition to patch 200
Patch204: bind-9.11-CVE-2023-50387-fixup.patch
# https://gitlab.isc.org/isc-projects/bind9/commit/225f2861920b8f8d42a0ea6c34dd1faa93aa8726
Patch205: bind-9.11-CVE-2024-1975.patch
# https://gitlab.isc.org/isc-projects/bind9/commit/3e0a67e4bdb253dae3a03a45c1aa117239a3313d
# https://gitlab.isc.org/isc-projects/bind9/commit/e4d7ce686bb38428eddc7e33b40057d68eca9a6e
# https://gitlab.isc.org/isc-projects/bind9/commit/b9b5485b22c364fb88c27aa04bad4c8f616da3fa
# https://gitlab.isc.org/isc-projects/bind9/commit/3f10d6eff035702796ba82cd28b9f7cf9836e743
# https://gitlab.isc.org/isc-projects/bind9/commit/23a4652346fb2877d6246b1eebaa967969dbde16
Patch206: bind-9.11-CVE-2024-1737.patch
# RH downstream, allow changing by environment
Patch208: bind-9.11-CVE-2024-1737-runtime-env.patch
# SDB patches
Patch11: bind-9.3.2b2-sdbsrc.patch
@ -197,6 +222,12 @@ Obsoletes: caching-nameserver < 31:9.4.1-7.fc8
Provides: caching-nameserver = 31:9.4.1-7.fc8
Obsoletes: dnssec-conf < 1.27-2
Provides: dnssec-conf = 1.27-2
# Fixes of CVE-2023-50387 and CVE-2023-50868 caused ABI change
# Enforce updated rebuild is accepted only
Conflicts: bind-dyndb-ldap < 11.6-5
Conflicts: dhcp-client < 12:4.3.6-50
Conflicts: dhcp-server < 12:4.3.6-50
Conflicts: dhcp-relay < 12:4.3.6-50
BuildRequires: gcc, make
BuildRequires: openssl-devel, libtool, autoconf, pkgconfig, libcap-devel
BuildRequires: libidn2-devel, libxml2-devel
@ -578,7 +609,17 @@ are used for building ISC DHCP.
%patch194 -p1 -b .CVE-2022-3094
%patch195 -p1 -b .CVE-2022-3094
%patch196 -p1 -b .CVE-2022-3094-test
%patch197 -p1 -b .CVE-2023-2828
%patch198 -p1 -b .CVE-2023-3341
%patch199 -p1 -b .RHEL-11785
%patch200 -p1 -b .b.root-servers.net
%patch201 -p1 -b .CVE-2023-4408
%patch202 -p1 -b .CVE-2023-50387+50868
%patch203 -p1 -b .CVE-2023-2828-fixup
%patch204 -p1 -b .CVE-2023-50387-fixup
%patch205 -p1 -b .CVE-2024-1975
%patch206 -p1 -b .CVE-2024-1737
%patch208 -p1 -b .CVE-2024-1737-env
mkdir lib/dns/tests/testdata/dstrandom
cp -a %{SOURCE50} lib/dns/tests/testdata/dstrandom/random.data
@ -1631,6 +1672,37 @@ rm -rf ${RPM_BUILD_ROOT}
%endif
%changelog
* Tue Aug 06 2024 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-16.2
- Rebuild after CI change
* Thu Jul 18 2024 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-16.1
- Resolve CVE-2024-1975
- Resolve CVE-2024-1737
- Add ability to change runtime limits for max types and records per name
* Mon Apr 15 2024 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-16
- Ensure incompatible dhcp is not accepted
* Fri Apr 12 2024 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-15
- Ensure incompatible bind-dyndb-ldap is not accepted
* Mon Feb 26 2024 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-14
- Speed up parsing of DNS messages with many different names (CVE-2023-4408)
- Prevent increased CPU consumption in DNSSEC validator (CVE-2023-50387 CVE-2023-50868)
- Do not use header_prev in expire_lru_headers
* Thu Dec 07 2023 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-13
- Update addresses of b.root-servers.net (RHEL-18449)
* Mon Oct 09 2023 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-12
- Disable caching of stale records by default (RHEL-11785)
* Tue Sep 19 2023 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-11
- Prevent exahustion of memory from control channel (CVE-2023-3341)
* Thu Jun 22 2023 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-10
- Prevent the cache going over the configured limit (CVE-2023-2828)
* Wed Feb 08 2023 Petr Menšík <pemensik@redhat.com> - 32:9.11.36-9
- Prevent flooding with UPDATE requests (CVE-2022-3094)
- include upstream test for that change