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| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | malloc/malloc.c | 4 |
2 files changed, 9 insertions, 0 deletions
@@ -1,3 +1,8 @@ +2018-08-16 DJ Delorie <dj@delorie.com> + + * malloc/malloc.c (_int_free): Check for corrupt prev_size vs size. + (malloc_consolidate): Likewise. + 2018-08-16 Pochang Chen <johnchen902@gmail.com> * malloc/malloc.c (_int_malloc.c): Verify size of top chunk. diff --git a/malloc/malloc.c b/malloc/malloc.c index 9431108..7c8bf84 100644 --- a/malloc/malloc.c +++ b/malloc/malloc.c @@ -4281,6 +4281,8 @@ _int_free (mstate av, mchunkptr p, int have_lock) prevsize = prev_size (p); size += prevsize; p = chunk_at_offset(p, -((long) prevsize)); + if (__glibc_unlikely (chunksize(p) != prevsize)) + malloc_printerr ("corrupted size vs. prev_size while consolidating"); unlink(av, p, bck, fwd); } @@ -4442,6 +4444,8 @@ static void malloc_consolidate(mstate av) prevsize = prev_size (p); size += prevsize; p = chunk_at_offset(p, -((long) prevsize)); + if (__glibc_unlikely (chunksize(p) != prevsize)) + malloc_printerr ("corrupted size vs. prev_size in fastbins"); unlink(av, p, bck, fwd); } |