[PATCH] malloc: harden removal from unsorted list

[Francois Goichon]

	* malloc/malloc.c (_int_malloc): Added check before removing from
	unsorted list.
---
  malloc/malloc.c | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/malloc/malloc.c b/malloc/malloc.c
index 58f9acd4d1..fd1a263e9e 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3775,6 +3775,8 @@ _int_malloc (mstate av, size_t bytes)
              }

            /* remove from unsorted list */
+          if (__glibc_unlikely (bck->fd != victim))
+            malloc_printerr ("malloc(): corrupted unsorted chunks 3");
            unsorted_chunks (av)->bk = bck;
            bck->fd = unsorted_chunks (av);