linux-kernel - PROBLEM: Kernel oops when overwriting a file being debugged in gdb

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Message-ID: <1290524475.2514.16.camel@pmpc1094.npm.ac.uk>
Date:	Tue, 23 Nov 2010 15:01:15 +0000
From:	"Mo Abrahams" <moab@....ac.uk>
To:	<linux-kernel@...r.kernel.org>
Subject: PROBLEM: Kernel oops when overwriting a file being debugged in gdb

Kernel oops when overwriting a file being debugged in gdb.

(The easy answer to this is "don't do it", but the kernel should
possibly be able to deal with it)

Linux version 2.6.34.7-61.fc13.x86_64
(mockbuild@...-02.phx2.fedoraproject.org) (gcc version 4.4.4 20100630
(Red Hat 4.4.4-10) (GCC) ) #1 SMP Tue Oct 19 04:06:30 UTC 2010

gdb version GNU gdb (GDB) Fedora (7.1-34.fc13)

Kernel oops messages attached.

To replicate:

/* code.c */
#include <stdio.h>

int main(void) {

puts("hello\n");
return 0;
}
/*end of code*/

> gcc -ggdb3 -o one code.c && gcc -ggdb3 -o two code.c

> gdb one
   break 3
   run
(breaks at line)

> cp two one

KERNEL OOPS!

Mo Abrahams.

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