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2004-12-09  Ulrich Drepper  <drepper@redhat.com>

	* malloc/malloc.c (public_rEALLOc): Add parameter checks.
	(_int_free): Provide better error message for invalid pointers.
This commit is contained in:
Ulrich Drepper 2004-12-10 01:36:18 +00:00
parent bf7c04cd5f
commit dc165f7b0b
3 changed files with 35 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2004-12-09 Ulrich Drepper <drepper@redhat.com>
* malloc/malloc.c (public_rEALLOc): Add parameter checks.
(_int_free): Provide better error message for invalid pointers.
2004-12-01 Jakub Jelinek <jakub@redhat.com>
* posix/tst-regex.c: Use defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0

17
linuxthreads/ChangeLog
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@ -1,3 +1,20 @@
2004-12-01 Jakub Jelinek <jakub@redhat.coM.
* sysdeps/unix/sysv/linux/bits/posix_opt.h (_POSIX_CPUTIME,
_POSIX_THREAD_CPUTIME): Define to 0.
* sysdeps/pthread/timer_create.c (timer_create): Remove unused code
handling CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID.
* sysdeps/pthread/timer_routines.c (__timer_signal_thread_pclk,
__timer_signal_thread_tclk): Remove.
(init_module): Remove their initialization.
(thread_cleanup): Remove their cleanup assertions.
* sysdeps/pthread/posix-timer.h (__timer_signal_thread_pclk,
__timer_signal_thread_tclk): Remove.
* sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Removed.
* sysdeps/unix/sysv/linux/ia64/bits/posix_opt.h: Removed.
* sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h: Removed.
* tst-clock1.c (do_test): Check for availability of CPU clock.
2004-11-18 Daniel Jacobowitz <dan@codesourcery.com>
* sysdeps/unix/sysv/linux/arm/sysdep-cancel.h: Update RETINSTR use.

15
malloc/malloc.c
View File

@ -3434,6 +3434,17 @@ public_rEALLOc(Void_t* oldmem, size_t bytes)
oldp = mem2chunk(oldmem);
oldsize = chunksize(oldp);
/* Little security check which won't hurt performance: the
allocator never wrapps around at the end of the address space.
Therefore we can exclude some size values which might appear
here by accident or by "design" from some intruder. */
if (__builtin_expect ((uintptr_t) oldp > (uintptr_t) -oldsize, 0)
|| __builtin_expect ((uintptr_t) oldp & MALLOC_ALIGN_MASK, 0))
{
malloc_printerr (check_action, "realloc(): invalid pointer", oldmem);
return NULL;
}
checked_request2size(bytes, nb);
#if HAVE_MMAP
@ -4205,7 +4216,6 @@ _int_free(mstate av, Void_t* mem)
mchunkptr bck; /* misc temp for linking */
mchunkptr fwd; /* misc temp for linking */
const char *errstr = NULL;
p = mem2chunk(mem);
@ -4215,7 +4225,8 @@ _int_free(mstate av, Void_t* mem)
allocator never wrapps around at the end of the address space.
Therefore we can exclude some size values which might appear
here by accident or by "design" from some intruder. */
if (__builtin_expect ((uintptr_t) p > (uintptr_t) -size, 0))
if (__builtin_expect ((uintptr_t) p > (uintptr_t) -size, 0)
|| __builtin_expect ((uintptr_t) p & MALLOC_ALIGN_MASK, 0))
{
errstr = "free(): invalid pointer";
errout: