linux-kernel - Re: WARNING: at drivers/tty/tty_ldisc.c:766 tty_ldisc

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Message-ID: <4E5FF216.2020207@suse.cz>
Date:	Thu, 01 Sep 2011 22:59:02 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: WARNING: at drivers/tty/tty_ldisc.c:766 tty_ldisc_reinit+0x52/0x90()
 [3.0]

On 08/28/2011 03:15 PM, Dave Jones wrote:
> Just saw this on a box that was recieving an rsync while I ssh'd in.
> The ssh session hung.

Yes, could you apply the attached debug patch and post a dmesg output?

> WARNING: at drivers/tty/tty_ldisc.c:766 tty_ldisc_reinit+0x52/0x90()
> Hardware name:
> Modules linked in: nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc p4_clockmod freq_table speedstep_lib nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack microcode serio_raw snd_hda_codec_realtek i2c_i801 snd_hda_intel snd_hda_codec iTCO_wdt snd_hwdep iTCO_vendor_support snd_seq snd_seq_device snd_pcm snd_timer snd r8169 soundcore mii snd_page_alloc pata_sil680 i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: mperf]
> Pid: 1381, comm: sshd Not tainted 2.6.40-4.fc15.x86_64.debug #1
> Call Trace:
>   [<ffffffff81058e74>] warn_slowpath_common+0x83/0x9b
>   [<ffffffff81058ea6>] warn_slowpath_null+0x1a/0x1c
>   [<ffffffff812f8e18>] tty_ldisc_reinit+0x52/0x90
>   [<ffffffff812f9415>] tty_ldisc_hangup+0x13f/0x1e1
>   [<ffffffff812f21b6>] __tty_hangup+0x111/0x35f
>   [<ffffffff812f2429>] tty_vhangup+0xe/0x10
>   [<ffffffff812faade>] pty_close+0x128/0x132
>   [<ffffffff812f3404>] tty_release+0x1d8/0x4dc
>   [<ffffffff81087a2e>] ? lock_release_holdtime.part.8+0x6b/0x72
>   [<ffffffff8100eebf>] ? native_sched_clock+0x34/0x36
>   [<ffffffff8113cdb2>] fput+0x127/0x1f5
>   [<ffffffff81139d90>] filp_close+0x70/0x7b
>   [<ffffffff81139e91>] sys_close+0xf6/0x13b
>   [<ffffffff814fdf02>] system_call_fastpath+0x16/0x1b



-- 
js
suse labs

View attachment "0001-TTY-tty_ldisc_wait_idle-debug.patch" of type "text/x-patch" (1225 bytes)