From: Nick Piggin <npiggin@suse.de>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Roland McGrath <roland@redhat.com>,
Oleg Nesterov <oleg@redhat.com>
Subject: Zombie process when ptracing
Date: Thu, 19 Nov 2009 11:25:43 +0100 [thread overview]
Message-ID: <20091119102543.GB5602@wotan.suse.de> (raw)
Hi,
Running recent git kernel, I have a process stuck in Z state
bash ? 0000000000000000 0 3188 3187 0x00000000
ffff88012e24fec8 0000000000000046 0000000000000000 0000000000000012
ffff88012e24fec8 ffff88012e24e000 ffff88012e24ffd8 ffff88012e24e000
000000000000efc8 ffff88012e24e000 ffff88012ea82090 ffff88012ff78640
Call Trace:
[<ffffffff8124baee>] ? proc_clear_tty+0x5e/0x70
[<ffffffff810587a8>] ? exit_ptrace+0xb8/0x140
[<ffffffff8105126a>] do_exit+0x58a/0x7c0
[<ffffffff810514dd>] do_group_exit+0x3d/0xb0
[<ffffffff81051562>] sys_exit_group+0x12/0x20
[<ffffffff8100b3eb>] system_call_fastpath+0x16/0x1b
This was after stracing a few test programs.
It also seems to have lost job control (^C) at the same time.
Hmm, and the kernel just paniced with an nmi lockup while I was
trying to get more info.
Call Trace:
<IRQ>
[<ffffffff811e5aa3>] __const_udelay+0x43/0x50
[<ffffffff810261bc>] arch_trigger_all_cpu_backtrace+0x4c/0x70
[<ffffffff81264f79>] sysrq_handle_showallcpus+0x9/0x10
[<ffffffff81264d10>] __handle_sysrq+0x120/0x180
[<ffffffff81264de6>] handle_sysrq+0x26/0x30
[<ffffffff81275af0>] serial8250_handle_port+0x210/0x2f0
[<ffffffff81275c58>] serial8250_interrupt+0x88/0x120
[<ffffffff810872e7>] handle_IRQ_event+0xa7/0x1e0
[<ffffffff810891cc>] handle_edge_irq+0xbc/0x150
[<ffffffff8100e2df>] handle_irq+0x1f/0x30
[<ffffffff8100d86a>] do_IRQ+0x6a/0xe0
[<ffffffff8100bc93>] ret_from_intr+0x0/0xa
<EOI>
[<ffffffff81013842>] ? default_idle+0xa2/0xc0
[<ffffffff8106f8d1>] ? __atomic_notifier_call_chain+0x31/0x60
[<ffffffff81013b1a>] ? c1e_idle+0x3a/0x100
[<ffffffff8106f911>] ? atomic_notifier_call_chain+0x11/0x20
[<ffffffff8100a66b>] ? cpu_idle+0x6b/0xc0
[<ffffffff81439dc6>] ? start_secondary+0x17c/0x1d6
I'll update this space if I can repeat it again. Any ideas?
next reply other threads:[~2009-11-19 10:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-19 10:25 Nick Piggin [this message]
2009-11-20 1:29 ` Oleg Nesterov
2009-11-23 8:36 ` Nick Piggin
2009-11-23 15:16 ` Oleg Nesterov
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