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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-07-11 07:44:01 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-07-11 07:44:14 -0700 |
| commit | ed421fca42fd9b4cab7c66e77894b8dd7ca57ed0 (patch) | |
| tree | f1131793bd3340ada62e6d31434e1d8003eec2fd /debug/fortify_fail.c | |
| parent | 94070f86c0c849c71ed2e7e2189bb4d1f7411a17 (diff) | |
| download | glibc-ed421fca42fd9b4cab7c66e77894b8dd7ca57ed0.zip glibc-ed421fca42fd9b4cab7c66e77894b8dd7ca57ed0.tar.gz glibc-ed421fca42fd9b4cab7c66e77894b8dd7ca57ed0.tar.bz2 | |
Avoid backtrace from __stack_chk_fail [BZ #12189]
__stack_chk_fail is called on corrupted stack. Stack backtrace is very
unreliable against corrupted stack. __libc_message is changed to accept
enum __libc_message_action and call BEFORE_ABORT only if action includes
do_backtrace. __fortify_fail_abort is added to avoid backtrace from
__stack_chk_fail.
[BZ #12189]
* debug/Makefile (CFLAGS-tst-ssp-1.c): New.
(tests): Add tst-ssp-1 if -fstack-protector works.
* debug/fortify_fail.c: Include <stdbool.h>.
(_fortify_fail_abort): New function.
(__fortify_fail): Call _fortify_fail_abort.
(__fortify_fail_abort): Add a hidden definition.
* debug/stack_chk_fail.c: Include <stdbool.h>.
(__stack_chk_fail): Call __fortify_fail_abort, instead of
__fortify_fail.
* debug/tst-ssp-1.c: New file.
* include/stdio.h (__libc_message_action): New enum.
(__libc_message): Replace int with enum __libc_message_action.
(__fortify_fail_abort): New hidden prototype.
* malloc/malloc.c (malloc_printerr): Update __libc_message calls.
* sysdeps/posix/libc_fatal.c (__libc_message): Replace int
with enum __libc_message_action. Call BEFORE_ABORT only if
action includes do_backtrace.
(__libc_fatal): Update __libc_message call.
Diffstat (limited to 'debug/fortify_fail.c')
| -rw-r--r-- | debug/fortify_fail.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/debug/fortify_fail.c b/debug/fortify_fail.c index a31977a..c90d384 100644 --- a/debug/fortify_fail.c +++ b/debug/fortify_fail.c @@ -17,17 +17,28 @@ #include <stdio.h> #include <stdlib.h> +#include <stdbool.h> extern char **__libc_argv attribute_hidden; void __attribute__ ((noreturn)) internal_function -__fortify_fail (const char *msg) +__fortify_fail_abort (_Bool do_backtrace, const char *msg) { /* The loop is added only to keep gcc happy. */ while (1) - __libc_message (2, "*** %s ***: %s terminated\n", + __libc_message (do_backtrace ? (do_abort | do_backtrace) : do_abort, + "*** %s ***: %s terminated\n", msg, __libc_argv[0] ?: "<unknown>"); } + +void +__attribute__ ((noreturn)) internal_function +__fortify_fail (const char *msg) +{ + __fortify_fail_abort (true, msg); +} + libc_hidden_def (__fortify_fail) +libc_hidden_def (__fortify_fail_abort) |