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Update.

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2004-11-19  Ulrich Drepper  <drepper@redhat.com>

	* malloc/malloc.c (_int_free): Add a few more cheap tests for
	corruption.

	* debug/fprintf_chk.c: Adjust all users.
This commit is contained in:
Ulrich Drepper
2004-11-19 21:35:00 +00:00
parent 3defcff399
commit 893e609847
2 changed files with 20 additions and 2 deletions
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15
malloc/malloc.c
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@ -4233,6 +4233,14 @@ _int_free(mstate av, Void_t* mem)
#endif
) {
if (__builtin_expect (chunk_at_offset (p, size)->size <= 2 * SIZE_SZ, 0)
|| __builtin_expect (chunksize (chunk_at_offset (p, size))
>= av->system_mem, 0))
{
errstr = "invalid next size (fast)";
goto errout;
}
set_fastchunks(av);
fb = &(av->fastbins[fastbin_index(size)]);
/* Another simple check: make sure the top of the bin is not the
@ -4276,7 +4284,12 @@ _int_free(mstate av, Void_t* mem)
}
nextsize = chunksize(nextchunk);
assert(nextsize > 0);
if (__builtin_expect (nextchunk->size <= 2 * SIZE_SZ, 0)
|| __builtin_expect (nextsize >= av->system_mem, 0))
{
errstr = "invalid next size (normal)";
goto errout;
}
/* consolidate backward */
if (!prev_inuse(p)) {