From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 14 Feb 2008 08:02:13 +0000 (+0100)
Subject: panic: print more informative messages on stackprotect failure
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=517a92c4e19fcea815332d3155e9fb7723251274;p=mv-sheeva.git

panic: print more informative messages on stackprotect failure

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>
---

diff --git a/kernel/panic.c b/kernel/panic.c
index 425567f45b9..f236001cc4d 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -327,7 +327,8 @@ EXPORT_SYMBOL(warn_on_slowpath);
  */
 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);
 #endif