linux-kernel - [2.6.27-git-a447c093244] BUG: spinlock bad magic on CPU#0, setserial/3527

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Date:	Tue, 14 Oct 2008 00:05:39 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Dmitry Torokhov <dtor@...ightbb.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [2.6.27-git-a447c093244] BUG: spinlock bad magic on CPU#0, setserial/3527

Hi,

The Linus' tree from today on Asus L5D:

BUG: spinlock bad magic on CPU#0, setserial/3527
 lock: ffffffff80dae020, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
Pid: 3527, comm: setserial Not tainted 2.6.27-git #57
Call Trace:
 [<ffffffff80345aae>] spin_bug+0xde/0xf0
 [<ffffffff80345bd6>] _raw_spin_lock+0x86/0x140
 [<ffffffff804823ca>] _spin_lock_irq+0x3a/0x50
 [<ffffffff803ae89d>] ? serial8250_startup+0x13d/0x610
 [<ffffffff803ae89d>] serial8250_startup+0x13d/0x610
 [<ffffffff803abd9a>] uart_startup+0x6a/0x1a0
 [<ffffffff803acca5>] uart_open+0x115/0x4a0
 [<ffffffff80482286>] ? _spin_unlock+0x26/0x30
 [<ffffffff8038d271>] ? check_tty_count+0x21/0xc0
 [<ffffffff8039067a>] tty_open+0x1ea/0x440
 [<ffffffff802a8490>] chrdev_open+0xa0/0x1c0
 [<ffffffff802a385c>] __dentry_open+0xcc/0x2c0
 [<ffffffff802a83f0>] ? chrdev_open+0x0/0x1c0
 [<ffffffff802a3a94>] nameidata_to_filp+0x44/0x60
 [<ffffffff802b052d>] do_filp_open+0x1fd/0x8f0
 [<ffffffff802add86>] ? getname+0x36/0x210
 [<ffffffff802bda06>] ? alloc_fd+0x106/0x130
 [<ffffffff802a36ae>] do_sys_open+0x5e/0xf0
 [<ffffffff802a376b>] sys_open+0x1b/0x20
 [<ffffffff8020b66b>] system_call_fastpath+0x16/0x1b

Do I have to bisect? :-)

Rafael
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