Andrew Morton napisał(a):
> On Sat, 07 Apr 2007 14:30:04 +0200 Michal Piotrowski <[email protected]> wrote:
>
>> [email protected] napisał(a):
>>> The mm snapshot broken-out-2007-04-07-03-27.tar.gz has been uploaded to
>>>
>>> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/mm/broken-out-2007-04-07-03-27.tar.gz
>>>
>>> It contains the following patches against 2.6.21-rc6:
>>>
>> LTP triggered a ptrace problem.
>>
>> ------------[ cut here ]------------
>> kernel BUG at kernel/ptrace.c:1281!
>
> umm, Roland, if you're going to add assertions which only function with
> CONFIG_PREEMPT enabled, you'd better test with CONFIG_PREEMPT enabled ;)
>
>
> From: Andrew Morton <[email protected]>
>
> We hold read_lock(tasklist_lock) in here.
>
> Cc: Roland McGrath <[email protected]>
> Signed-off-by: Andrew Morton <[email protected]>
> ---
>
> kernel/ptrace.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff -puN kernel/ptrace.c~utrace-fix-bug kernel/ptrace.c
> --- a/kernel/ptrace.c~utrace-fix-bug
> +++ a/kernel/ptrace.c
> @@ -1278,8 +1278,6 @@ found:
> current->pid, tsk->pid, p->pid, exit_code,
> p->exit_state, p->exit_signal);
>
> - NO_LOCKS;
> -
> /*
> * If there was a group exit in progress, all threads report that
> * status. Most will have SIGKILL in their own exit_code.
> _
>
>
>
Thanks.
BTW. I guess that this need a similar fix.
kernel BUG at kernel/ptrace.c:494!
invalid opcode: 0000 [#2]
PREEMPT SMP
last sysfs file: devices/platform/w83627hf.656/temp2_input
Modules linked in: ipt_MASQUERADE iptable_nat nf_nat nfsd exportfs lockd nfs_acl autofs4 sunrpc af_packet nf_conntrack_netbios_ns ipt_REJECT nf_conntrack_ipv4 xt_state nf_conntrack nfnetlink iptable_filter ip_tables ip6t_REJECT xt_tcpudp ip6table_filter ip6_tables x_tables ipv6 binfmt_misc thermal processor fan container nvram snd_intel8x0 snd_ac97_codec ac97_bus snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss intel_agp snd_pcm agpgart evdev snd_timer snd soundcore i2c_i801 snd_page_alloc ide_cd cdrom rtc unix
CPU: 1
EIP: 0060:[<c0163f22>] Not tainted VLI
EFLAGS: 00010202 (2.6.21-rc6-mm1 #1)
EIP is at ptrace_exit+0x29/0x21d
l *0xc0163f22
0xc0163f22 is in ptrace_exit (kernel/ptrace.c:494).
489 ptrace_exit(struct task_struct *tsk)
490 {
491 struct list_head *pos, *n;
492 int restart;
493
494 NO_LOCKS;
495
496 /*
497 * Taking the task_lock after PF_EXITING is set ensures that a
498 * child in ptrace_traceme will not put itself on our list when
Regards,
Michal
--
Michal K. K. Piotrowski
LTG - Linux Testers Group (PL)
(http://www.stardust.webpages.pl/ltg/)
LTG - Linux Testers Group (EN)
(http://www.stardust.webpages.pl/linux_testers_group_en/)
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