mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-01-30 12:31:53 +08:00
Code Issues Packages Projects Releases Wiki Activity

malloc: additional unlink hardening for non-small bins [BZ #17344]

Browse Source 
Turn two asserts into a conditional call to malloc_printerr.  The
memory locations are accessed later anyway, so the performance
impact is minor.
This commit is contained in:
Florian Weimer 2014-09-10 20:29:15 +02:00
parent 984c0ea97f
commit 52ffbdf25a
3 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
ChangeLog
View File

@ -1,3 +1,9 @@
2014-09-11 Florian Weimer <fweimer@redhat.com>
[BZ #17344]
* malloc/malloc.c (unlink): Turn asserts into a call to
malloc_printerr.
2014-09-11 Tim Lammens <tim.lammens@gmail.com>
[BZ #17370]

2
NEWS
View File

@ -29,7 +29,7 @@ Version 2.20
16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17344, 17354.
* Reverted change of ABI data structures for s390 and s390x:
On s390 and s390x the size of struct ucontext and jmp_buf was increased in

6
malloc/malloc.c
View File

@ -1418,8 +1418,10 @@ 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);\
if (FD->fd_nextsize == NULL) { \
if (P->fd_nextsize == P) \
FD->fd_nextsize = FD->bk_nextsize = FD; \