svn commit: r233927 - head/libexec/rtld-elf
Konstantin Belousov
kib at FreeBSD.org
Thu Apr 5 18:47:55 UTC 2012
Author: kib
Date: Thu Apr 5 18:47:54 2012
New Revision: 233927
URL: http://svn.freebsd.org/changeset/base/233927
Log:
Properly handle absent AT_CANARY aux entry.
Submitted by: Andrey Zonov <andrey zonov org>
MFC after: 3 days
Modified:
head/libexec/rtld-elf/rtld.c
Modified: head/libexec/rtld-elf/rtld.c
==============================================================================
--- head/libexec/rtld-elf/rtld.c Thu Apr 5 18:43:27 2012 (r233926)
+++ head/libexec/rtld-elf/rtld.c Thu Apr 5 18:47:54 2012 (r233927)
@@ -351,7 +351,8 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_
main_argc = argc;
main_argv = argv;
- if (aux_info[AT_CANARY]->a_un.a_ptr != NULL) {
+ if (aux_info[AT_CANARY] != NULL &&
+ aux_info[AT_CANARY]->a_un.a_ptr != NULL) {
i = aux_info[AT_CANARYLEN]->a_un.a_val;
if (i > sizeof(__stack_chk_guard))
i = sizeof(__stack_chk_guard);
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