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ce30f77919
bind/bind-96-realloc.patch
Adam Tkac ce30f77919 - fixed some read buffer overflows (upstream)
2009-03-04 09:27:48 +00:00

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Index: lib/isc/mem.c
===================================================================
RCS file: /var/snap/bind9/lib/isc/mem.c,v
retrieving revision 1.145
retrieving revision 1.145.120.4
diff -u -p -r1.145 -r1.145.120.4
--- lib/isc/mem.c 2 Apr 2008 02:37:42 -0000 1.145
+++ lib/isc/mem.c 16 Feb 2009 03:17:05 -0000 1.145.120.4
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1997-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: bind-96-realloc.patch,v 1.1 2009/03/04 09:27:48 atkac Exp $ */
+/* $Id: bind-96-realloc.patch,v 1.1 2009/03/04 09:27:48 atkac Exp $ */
/*! \file */
@@ -52,7 +52,7 @@ LIBISC_EXTERNAL_DATA unsigned int isc_me
#define DEF_MAX_SIZE 1100
#define DEF_MEM_TARGET 4096
-#define ALIGNMENT_SIZE 8 /*%< must be a power of 2 */
+#define ALIGNMENT_SIZE 8U /*%< must be a power of 2 */
#define NUM_BASIC_BLOCKS 64 /*%< must be > 1 */
#define TABLE_INCREMENT 1024
#define DEBUGLIST_COUNT 1024
@@ -1191,7 +1191,7 @@ print_active(isc_mem_t *mctx, FILE *out)
const char *format;
isc_boolean_t found;
- fprintf(out, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
+ fprintf(out, "%s", isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_DUMPALLOC,
"Dump of all outstanding "
"memory allocations:\n"));
@@ -1217,7 +1217,7 @@ print_active(isc_mem_t *mctx, FILE *out)
}
}
if (!found)
- fprintf(out, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
+ fprintf(out, "%s", isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_NONE, "\tNone.\n"));
}
}
@@ -1259,7 +1259,7 @@ isc_mem_stats(isc_mem_t *ctx, FILE *out)
*/
pool = ISC_LIST_HEAD(ctx->pools);
if (pool != NULL) {
- fprintf(out, isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
+ fprintf(out, "%s", isc_msgcat_get(isc_msgcat, ISC_MSGSET_MEM,
ISC_MSG_POOLSTATS,
"[Pool statistics]\n"));
fprintf(out, "%15s %10s %10s %10s %10s %10s %10s %10s %1s\n",
@@ -1365,6 +1365,40 @@ isc__mem_allocate(isc_mem_t *ctx, size_t
return (si);
}
+void *
+isc__mem_reallocate(isc_mem_t *ctx, void *ptr, size_t size FLARG) {
+ void *new_ptr = NULL;
+ size_t oldsize, copysize;
+
+ REQUIRE(VALID_CONTEXT(ctx));
+
+ /*
+ * This function emulates the realloc(3) standard library function:
+ * - if size > 0, allocate new memory; and if ptr is non NULL, copy
+ * as much of the old contents to the new buffer and free the old one.
+ * Note that when allocation fails the original pointer is intact;
+ * the caller must free it.
+ * - if size is 0 and ptr is non NULL, simply free the given ptr.
+ * - this function returns:
+ * pointer to the newly allocated memory, or
+ * NULL if allocation fails or doesn't happen.
+ */
+ if (size > 0U) {
+ new_ptr = isc__mem_allocate(ctx, size FLARG_PASS);
+ if (new_ptr != NULL && ptr != NULL) {
+ oldsize = (((size_info *)ptr)[-1]).u.size;
+ INSIST(oldsize >= ALIGNMENT_SIZE);
+ oldsize -= ALIGNMENT_SIZE;
+ copysize = oldsize > size ? size : oldsize;
+ memcpy(new_ptr, ptr, copysize);
+ isc__mem_free(ctx, ptr FLARG_PASS);
+ }
+ } else if (ptr != NULL)
+ isc__mem_free(ctx, ptr FLARG_PASS);
+
+ return (new_ptr);
+}
+
void
isc__mem_free(isc_mem_t *ctx, void *ptr FLARG) {
size_info *si;
Index: lib/isc/include/isc/mem.h
===================================================================
RCS file: /var/snap/bind9/lib/isc/include/isc/mem.h,v
retrieving revision 1.78
retrieving revision 1.78.120.3
diff -u -p -r1.78 -r1.78.120.3
--- lib/isc/include/isc/mem.h 31 Mar 2008 05:00:30 -0000 1.78
+++ lib/isc/include/isc/mem.h 11 Feb 2009 03:07:01 -0000 1.78.120.3
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1997-2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
@@ -15,7 +15,7 @@
* PERFORMANCE OF THIS SOFTWARE.
*/
-/* $Id: bind-96-realloc.patch,v 1.1 2009/03/04 09:27:48 atkac Exp $ */
+/* $Id: bind-96-realloc.patch,v 1.1 2009/03/04 09:27:48 atkac Exp $ */
#ifndef ISC_MEM_H
#define ISC_MEM_H 1
@@ -94,7 +94,7 @@ LIBISC_EXTERNAL_DATA extern unsigned int
/*!<
* The variable isc_mem_debugging holds a set of flags for
* turning certain memory debugging options on or off at
- * runtime. Its is intialized to the value ISC_MEM_DEGBUGGING,
+ * runtime. It is initialized to the value ISC_MEM_DEGBUGGING,
* which is 0 by default but may be overridden at compile time.
* The following flags can be specified:
*
@@ -106,7 +106,7 @@ LIBISC_EXTERNAL_DATA extern unsigned int
* Crash if a free doesn't match an allocation.
*
* \li #ISC_MEM_DEBUGUSAGE
- * If a hi_water mark is set, print the maximium inuse memory
+ * If a hi_water mark is set, print the maximum inuse memory
* every time it is raised once it exceeds the hi_water mark.
*
* \li #ISC_MEM_DEBUGSIZE
@@ -154,11 +154,12 @@ LIBISC_EXTERNAL_DATA extern unsigned int
#define isc_mem_get(c, s) isc__mem_get((c), (s) _ISC_MEM_FILELINE)
#define isc_mem_allocate(c, s) isc__mem_allocate((c), (s) _ISC_MEM_FILELINE)
+#define isc_mem_reallocate(c, p, s) isc__mem_reallocate((c), (p), (s) _ISC_MEM_FILELINE)
#define isc_mem_strdup(c, p) isc__mem_strdup((c), (p) _ISC_MEM_FILELINE)
#define isc_mempool_get(c) isc__mempool_get((c) _ISC_MEM_FILELINE)
/*%
- * isc_mem_putanddetach() is a convienence function for use where you
+ * isc_mem_putanddetach() is a convenience function for use where you
* have a structure with an attached memory context.
*
* Given:
@@ -341,12 +342,12 @@ isc_mem_setwater(isc_mem_t *mctx, isc_me
*
* When the memory usage of 'mctx' exceeds 'hiwater',
* '(water)(water_arg, #ISC_MEM_HIWATER)' will be called. 'water' needs to
- * call isc_mem_waterack() with #ISC_MEM_HIWATER to acknowlege the state
+ * call isc_mem_waterack() with #ISC_MEM_HIWATER to acknowledge the state
* change. 'water' may be called multiple times.
*
* When the usage drops below 'lowater', 'water' will again be called, this
* time with #ISC_MEM_LOWATER. 'water' need to calls isc_mem_waterack() with
- * #ISC_MEM_LOWATER to acknowlege the change.
+ * #ISC_MEM_LOWATER to acknowledge the change.
*
* static void
* water(void *arg, int mark) {
@@ -373,7 +374,7 @@ isc_mem_setwater(isc_mem_t *mctx, isc_me
void
isc_mem_waterack(isc_mem_t *ctx, int mark);
/*%<
- * Called to acknowledge changes in signalled by calls to 'water'.
+ * Called to acknowledge changes in signaled by calls to 'water'.
*/
void
@@ -512,7 +513,7 @@ isc_mempool_associatelock(isc_mempool_t
* and it is also used to set or get internal state via the isc_mempool_get*()
* and isc_mempool_set*() set of functions.
*
- * Mutiple pools can each share a single lock. For instance, if "manager"
+ * Multiple pools can each share a single lock. For instance, if "manager"
* type object contained pools for various sizes of events, and each of
* these pools used a common lock. Note that this lock must NEVER be used
* by other than mempool routines once it is given to a pool, since that can
@@ -612,6 +613,8 @@ void
isc__mem_put(isc_mem_t *, void *, size_t _ISC_MEM_FLARG);
void *
isc__mem_allocate(isc_mem_t *, size_t _ISC_MEM_FLARG);
+void *
+isc__mem_reallocate(isc_mem_t *, void *, size_t _ISC_MEM_FLARG);
void
isc__mem_free(isc_mem_t *, void * _ISC_MEM_FLARG);
char *
Index: lib/dns/openssl_link.c
===================================================================
RCS file: /var/snap/bind9/lib/dns/openssl_link.c,v
retrieving revision 1.22
retrieving revision 1.22.112.3
diff -u -p -r1.22 -r1.22.112.3
--- lib/dns/openssl_link.c 5 Apr 2008 23:47:11 -0000 1.22
+++ lib/dns/openssl_link.c 11 Feb 2009 03:07:01 -0000 1.22.112.3
@@ -1,5 +1,5 @@
/*
- * Portions Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC")
+ * Portions Copyright (C) 2004-2009 Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (C) 1999-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
@@ -31,7 +31,7 @@
/*
* Principal Author: Brian Wellington
- * $Id: bind-96-realloc.patch,v 1.1 2009/03/04 09:27:48 atkac Exp $
+ * $Id: bind-96-realloc.patch,v 1.1 2009/03/04 09:27:48 atkac Exp $
*/
#ifdef OPENSSL
@@ -148,18 +148,8 @@ mem_free(void *ptr) {
static void *
mem_realloc(void *ptr, size_t size) {
- void *p;
-
INSIST(dst__memory_pool != NULL);
- p = NULL;
- if (size > 0U) {
- p = mem_alloc(size);
- if (p != NULL && ptr != NULL)
- memcpy(p, ptr, size);
- }
- if (ptr != NULL)
- mem_free(ptr);
- return (p);
+ return (isc_mem_reallocate(dst__memory_pool, ptr, size));
}
isc_result_t
@@ -252,7 +242,7 @@ dst__openssl_init() {
for (e = ENGINE_get_first(); e != NULL; e = ENGINE_get_next(e)) {
/*
- * Something wierd here. If we call ENGINE_finish()
+ * Something weird here. If we call ENGINE_finish()
* ENGINE_get_default_RAND() will fail.
*/
if (ENGINE_init(e)) {
@@ -386,7 +376,7 @@ dst__openssl_setdefault(const char *name
*
* 'engine_id' is the openssl engine name.
*
- * pre_cmds and post_cmds a sequence if command arguement pairs
+ * pre_cmds and post_cmds a sequence if command argument pairs
* pre_num and post_num are a count of those pairs.
*
* "SO_PATH", PKCS11_SO_PATH ("/usr/local/lib/engines/engine_pkcs11.so")
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