You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
29 lines
1.2 KiB
29 lines
1.2 KiB
7 years ago
|
commit 52ffbdf25a1100986f4ae27bb0febbe5a722ab25
|
||
|
|
Author: Florian Weimer <fweimer@redhat.com>
|
||
|
|
Date: Wed Sep 10 20:29:15 2014 +0200
|
||
|
|
|
||
|
|
malloc: additional unlink hardening for non-small bins [BZ #17344]
|
||
|
|
|
||
|
|
Turn two asserts into a conditional call to malloc_printerr. The
|
||
|
|
memory locations are accessed later anyway, so the performance
|
||
|
|
impact is minor.
|
||
|
|
|
||
|
|
Index: b/malloc/malloc.c
|
||
|
|
===================================================================
|
||
|
|
--- a/malloc/malloc.c
|
||
|
|
+++ b/malloc/malloc.c
|
||
|
|
@@ -1441,8 +1441,11 @@ typedef struct malloc_chunk* mbinptr;
|
||
|
|
BK->fd = FD; \
|
||
|
|
if (!in_smallbin_range (P->size) \
|
||
|
|
&& __builtin_expect (P->fd_nextsize != NULL, 0)) { \
|
||
|
|
- assert (P->fd_nextsize->bk_nextsize == P); \
|
||
|
|
- assert (P->bk_nextsize->fd_nextsize == P); \
|
||
|
|
+ if (__builtin_expect (P->fd_nextsize->bk_nextsize != P, 0) \
|
||
|
|
+ || __builtin_expect (P->bk_nextsize->fd_nextsize != P, 0)) \
|
||
|
|
+ malloc_printerr (check_action, \
|
||
|
|
+ "corrupted double-linked list (not small)", P,\
|
||
|
|
+ AV); \
|
||
|
|
if (FD->fd_nextsize == NULL) { \
|
||
|
|
if (P->fd_nextsize == P) \
|
||
|
|
FD->fd_nextsize = FD->bk_nextsize = FD; \
|