Re: [RFC][PATCH] detect & print stack overruns at oops time

Randy Dunlap wrote:
On Fri, 31 Aug 2007 00:28:58 -0500 Eric Sandeen wrote:

Index: linux-2.6.22-rc4/arch/i386/mm/fault.c
===================================================================
--- linux-2.6.22-rc4.orig/arch/i386/mm/fault.c
+++ linux-2.6.22-rc4/arch/i386/mm/fault.c
@@ -543,6 +545,27 @@ no_context:
printk(KERN_ALERT "BUG: unable to handle kernel paging"
" request");
printk(" at virtual address %08lx\n",address);
+
+ overrun = (unsigned long)stackend - (unsigned long)(&regs->esp);
+ if (overrun > 0) {
+ printk(KERN_ALERT "Thread overrunning stack by %d "
+ "bytes\n", overrun);
+ } else {

Hi,

Is there something that tells us what <Thread> is doing all of this
bad juju?

Sure, the rest of the oops report will.

-Eric
-
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