From 6cce65407e2fc5015c69bb38741d6942b3e412c3 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sat, 20 Nov 2004 04:45:06 +0000 Subject: Update. * malloc/malloc.c (_int_malloc): Check for corruption of chunk which is about to be returned. --- malloc/malloc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'malloc/malloc.c') diff --git a/malloc/malloc.c b/malloc/malloc.c index d6810be7f6..b62ffb57c0 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -3840,8 +3840,12 @@ _int_malloc(mstate av, size_t bytes) */ if ((unsigned long)(nb) <= (unsigned long)(av->max_fast)) { - fb = &(av->fastbins[(fastbin_index(nb))]); + long int idx = fastbin_index(nb); + fb = &(av->fastbins[idx]); if ( (victim = *fb) != 0) { + if (__builtin_expect (fastbin_index (chunksize (victim)) != idx, 0)) + malloc_printerr (check_action, "malloc(): memory corruption (fast)", + chunk2mem (victim)); *fb = victim->fd; check_remalloced_chunk(av, victim, nb); return chunk2mem(victim); @@ -3911,6 +3915,10 @@ _int_malloc(mstate av, size_t bytes) while ( (victim = unsorted_chunks(av)->bk) != unsorted_chunks(av)) { bck = victim->bk; + if (__builtin_expect (victim->size <= 2 * SIZE_SZ, 0) + || __builtin_expect (victim->size > av->system_mem, 0)) + malloc_printerr (check_action, "malloc(): memory corruption", + chunk2mem (victim)); size = chunksize(victim); /* -- cgit v1.2.3