From: Sergey Senozhatsky <sergey.senozhatsky@mail.by>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>,
linux-kernel@vger.kernel.org
Subject: WARNING at: drivers/char/tty_ldisc.c
Date: Sun, 2 Aug 2009 15:01:20 +0300 [thread overview]
Message-ID: <20090802120120.GA3097@localdomain.by> (raw)
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Hello Linus, Ogawa,
Looks like we have one more bug in tty code:
'shutdown -r now' in 'single' user mode gives following trace:
WARNING at: drivers/char/tty_ldisc.c:209 tty_ldisc_put+0x95/0xa0
---
?printk+0x23/0x36
warn_slowpath_common+0x78/0xa0
?tty_ldisc_put+0x95/0xa0
?tty_ldisc_put+0x95/0xa0
warn_slowpath_null+0x21/0x40
tty_ldisc_put+0x95/0xa0
tty_ldisc_hangup+0xfc/0x1f0
do_tty_hangup+0x131/0x380
disassociate_ctty+0x50/0x210
do_exit+0x6b8/0x700
?put_lock_stats+0x18/0x50
?lock_release_holdtime+0xb2/0x190
?_spin_unlock_irq+0x30/0x70
?trace_hardirqs_on_caller+0x14c/0x1a0
do_group_exit+0x45/0xb0
get_signal_to_deliver+0x226/0x410
do_notify_resume+0xc1+0xa90
?trace_hardirqs_on+0x19/0x40
?_spin_unlock_irqrestore+0x47/0x90
?remove_wait_queue+0x47/0x70
?do_wait+0x19d/0x310
?defult_wake_function+0x0/0x40
?sys_wait4+0xa1/0x100
work_notifysig+0x13/0x19
//There is no trace in syslog, so given one is 'copy-paste' from the paper.
Sergey
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next reply other threads:[~2009-08-02 11:58 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-02 12:01 Sergey Senozhatsky [this message]
2009-08-02 16:05 ` Greg KH
2009-08-02 17:01 ` Sergey Senozhatsky
2009-08-02 17:07 ` Sergey Senozhatsky
2009-08-02 17:16 ` Linus Torvalds
2009-08-02 19:05 ` Sergey Senozhatsky
2009-08-02 20:20 ` Linus Torvalds
2009-08-02 21:17 ` OGAWA Hirofumi
2009-08-02 21:33 ` Linus Torvalds
2009-08-02 22:46 ` Sergey Senozhatsky
2009-08-02 22:48 ` Alan Cox
2009-08-03 0:40 ` Linus Torvalds
2009-08-03 1:44 ` Linus Torvalds
2009-08-03 9:37 ` Alan Cox
2009-08-03 16:26 ` OGAWA Hirofumi
2009-08-03 16:59 ` Alan Cox
2009-08-03 17:55 ` [PATCH 0/2] proper tty-ldisc refcounting (was Re: WARNING at: drivers/char/tty_ldisc.c) Linus Torvalds
2009-08-03 17:58 ` [PATCH 1/2] tty-ldisc: make refcount be atomic_t 'users' count Linus Torvalds
2009-08-03 18:11 ` [PATCH 2/2] tty-ldisc: turn ldisc user count into a proper refcount Linus Torvalds
2009-08-03 18:39 ` Alan Cox
2009-08-03 20:00 ` OGAWA Hirofumi
2009-08-03 18:18 ` [PATCH 0/2] proper tty-ldisc refcounting (was Re: WARNING at: drivers/char/tty_ldisc.c) Greg KH
2009-08-03 18:53 ` Linus Torvalds
2009-08-03 22:16 ` Sergey Senozhatsky
2009-08-03 22:25 ` Linus Torvalds
2009-08-03 22:58 ` [PATCH 3/2] tty-ldisc: be more careful in 'put_ldisc' locking Linus Torvalds
2009-08-03 23:00 ` [PATCH 4/2] tty-ldisc: make /proc/tty/ldiscs use ldisc_ops instead of ldiscs Linus Torvalds
2009-08-03 23:01 ` [PATCH 5/2] tty-ldisc: get rid of tty_ldisc_try_get() helper function Linus Torvalds
2009-08-04 0:30 ` proper tty-ldisc refcounting (was Re: WARNING at: drivers/char/tty_ldisc.c) Sergey Senozhatsky
2009-08-04 0:56 ` Linus Torvalds
2009-08-04 3:53 ` Greg KH
2009-08-04 4:08 ` Greg KH
2009-08-04 6:19 ` Linus Torvalds
2009-08-04 7:23 ` Greg KH
2009-08-04 9:12 ` Sergey Senozhatsky
2009-08-04 14:53 ` Greg KH
2009-08-04 15:40 ` Linus Torvalds
2009-08-04 16:00 ` Greg KH
2009-08-02 22:15 ` WARNING at: drivers/char/tty_ldisc.c Sergey Senozhatsky
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