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Fix perturbing in malloc on free.

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This commit is contained in:
Ulrich Drepper
2010-10-24 22:37:00 -04:00
parent d0b9e94faf
commit fdc0f374bc
3 changed files with 10 additions and 4 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2010-10-24 Ulrich Drepper <drepper@redhat.com>
[BZ #12140]
* malloc/malloc.c (_int_free): Fill correct number of bytes when
perturbing.
2010-10-20 Michael B. Brutman <brutman@us.ibm.com> 2010-10-20 Michael B. Brutman <brutman@us.ibm.com>
* sysdeps/powerpc/dl-procinfo.c: Add support for ppca2 platform * sysdeps/powerpc/dl-procinfo.c: Add support for ppca2 platform

4
NEWS
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@ -1,4 +1,4 @@
GNU C Library NEWS -- history of user-visible changes. 2010-10-13 GNU C Library NEWS -- history of user-visible changes. 2010-10-24
Copyright (C) 1992-2009, 2010 Free Software Foundation, Inc. Copyright (C) 1992-2009, 2010 Free Software Foundation, Inc.
See the end for copying conditions. See the end for copying conditions.
@ -11,7 +11,7 @@ Version 2.13
3268, 7066, 10851, 11611, 11640, 11701, 11840, 11856, 11883, 11903, 11904, 3268, 7066, 10851, 11611, 11640, 11701, 11840, 11856, 11883, 11903, 11904,
11968, 11979, 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 11968, 11979, 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108,
12113 12113, 12140
* New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark

4
malloc/malloc.c
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@ -4850,7 +4850,7 @@ _int_free(mstate av, mchunkptr p)
} }
if (__builtin_expect (perturb_byte, 0)) if (__builtin_expect (perturb_byte, 0))
free_perturb (chunk2mem(p), size - SIZE_SZ); free_perturb (chunk2mem(p), size - 2 * SIZE_SZ);
set_fastchunks(av); set_fastchunks(av);
unsigned int idx = fastbin_index(size); unsigned int idx = fastbin_index(size);
@ -4954,7 +4954,7 @@ _int_free(mstate av, mchunkptr p)
} }
if (__builtin_expect (perturb_byte, 0)) if (__builtin_expect (perturb_byte, 0))
free_perturb (chunk2mem(p), size - SIZE_SZ); free_perturb (chunk2mem(p), size - 2 * SIZE_SZ);
/* consolidate backward */ /* consolidate backward */
if (!prev_inuse(p)) { if (!prev_inuse(p)) {