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panic: print more informative messages on stackprotect failure

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pointed out by pageexec@freemail.hu:

we just simply panic() when there's a stackprotector attack - giving
the attacked person no information about what kernel code the attack went
against.

print out the attacked function.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar
2008-02-14 09:02:13 +01:00
committed by Thomas Gleixner
parent 7e09b2a02d
commit 517a92c4e1
1 changed files with 2 additions and 1 deletions
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3
kernel/panic.c
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@@ -327,7 +327,8 @@ EXPORT_SYMBOL(warn_on_slowpath);
*/ */
void __stack_chk_fail(void) void __stack_chk_fail(void)
{ {
panic("stack-protector: Kernel stack is corrupted"); panic("stack-protector: Kernel stack is corrupted in: %p\n",
__builtin_return_address(0));
} }
EXPORT_SYMBOL(__stack_chk_fail); EXPORT_SYMBOL(__stack_chk_fail);
#endif #endif