On Fri, 2005-11-18 at 12:57 -0800, Kenny Simpson wrote:
> strace causes the kernel to croak:
>
> cd /tmp
> strace ls
> *BOOM*
>
> Nov 18 15:44:31 tux6127 kernel: [ 221.522945] c0126b5b
> Nov 18 15:44:31 tux6127 kernel: [ 221.523069] PREEMPT SMP DEBUG_PAGEALLOC
> Nov 18 15:44:31 tux6127 kernel: [ 221.523268] Modules linked in: autofs4 parport_pc parport
> floppy rtc i2c_i801 i2c_core generic usbhid uhci_hcd tg3 snd_intel8x0 snd_ac97_codec snd_ac97_bus
> snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc ehci_hcd usbcore mousedev
> e1000 bcm5700 unix
> Nov 18 15:44:31 tux6127 kernel: [ 221.524392] CPU: 0
> Nov 18 15:44:31 tux6127 kernel: [ 221.524393] EIP: 0060:[<c0126b5b>] Not tainted VLI
> Nov 18 15:44:31 tux6127 kernel: [ 221.524394] EFLAGS: 00010202 (2.6.15-rc1-mm2)
> Nov 18 15:44:31 tux6127 kernel: [ 221.524525] EIP is at ptrace_check_attach+0x24/0xc4
Christoph sent this patch earlier, which fixed same problem for me.
Thanks,
Badari
Looks like 2.6.15-rc1-mm1 has total crap in ptrace_get_task_struct
(and it looks like my fault because I sent out a wrong patch).
The patch below should fix it:
Index: linux-2.6/kernel/ptrace.c
===================================================================
--- linux-2.6.orig/kernel/ptrace.c 2005-11-18 10:25:35.000000000 +0100
+++ linux-2.6/kernel/ptrace.c 2005-11-18 10:25:54.000000000 +0100
@@ -459,7 +459,7 @@
read_unlock(&tasklist_lock);
if (!child)
return ERR_PTR(-ESRCH);
- return 0;
+ return child;
}
#ifndef __ARCH_SYS_PTRACE
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
