Messages in this thread | | | Date | Sat, 07 Apr 2007 20:09:43 +0200 | Subject | Re: mm snapshot broken-out-2007-04-07-03-27.tar.gz uploaded | From | Michal Piotrowski <> |
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Andrew Morton napisał(a): > On Sat, 07 Apr 2007 14:30:04 +0200 Michal Piotrowski <michal.k.k.piotrowski@gmail.com> wrote: > >> akpm@linux-foundation.org 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 <akpm@linux-foundation.org> > > We hold read_lock(tasklist_lock) in here. > > Cc: Roland McGrath <roland@redhat.com> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org> > --- > > 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/) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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