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Fix perturbing in malloc on free.

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>
* 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.
See the end for copying conditions.
@ -11,7 +11,7 @@ Version 2.13
3268, 7066, 10851, 11611, 11640, 11701, 11840, 11856, 11883, 11903, 11904,
11968, 11979, 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108,
12113
12113, 12140
* New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark

4
malloc/malloc.c
View File

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