linux-kernel - 2.6.29-rc4, WARNING: at drivers/net/usb/hso.c:1285 hso_serial

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Date:	Wed, 11 Feb 2009 08:38:22 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	linux-kernel@...r.kernel.org,
	Denis Joseph Barrow <D.Barow@...ion.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	"David S. Miller" <davem@...emloft.net>, Alan Cox <alan@...hat.com>
Subject: 2.6.29-rc4, WARNING: at drivers/net/usb/hso.c:1285
	hso_serial_open+0x6a/0x230()


FYI, -tip testing started triggering this (non-fatal) warning a few days ago:

[  117.160184] ------------[ cut here ]------------
[  117.164868] WARNING: at drivers/net/usb/hso.c:1285 hso_serial_open+0x6a/0x230()
[  117.172222] Hardware name: System Product Name
[  117.176709] Modules linked in:
[  117.179847] Pid: 2496, comm: hwclock Not tainted 2.6.29-rc4-tip-01479-g5d85422-dirty #1
[  117.187890] Call Trace:
[  117.190383]  [<ffffffff8023862c>] warn_slowpath+0xdc/0x110
[  117.195911]  [<ffffffff8024c8c0>] ? wake_bit_function+0x0/0x30
[  117.201787]  [<ffffffff8028e52a>] ? __alloc_pages_internal+0xca/0x470
[  117.208269]  [<ffffffff805bbb7a>] ? tty_ldisc_enable+0x2a/0x30
[  117.214143]  [<ffffffff805bbc02>] ? tty_ldisc_setup+0x82/0x90
[  117.219932]  [<ffffffff806dd7fa>] hso_serial_open+0x6a/0x230
[  117.225636]  [<ffffffff805b7424>] tty_open+0x1e4/0x440
[  117.230820]  [<ffffffff802b9332>] chrdev_open+0x92/0x170
[  117.236174]  [<ffffffff802b4c5a>] __dentry_open+0xda/0x290
[  117.241702]  [<ffffffff802b92a0>] ? chrdev_open+0x0/0x170
[  117.247145]  [<ffffffff802b5d5e>] nameidata_to_filp+0x4e/0x60
[  117.252937]  [<ffffffff802c2037>] do_filp_open+0x1e7/0x8d0
[  117.258465]  [<ffffffff802af4a8>] ? check_object+0x228/0x260
[  117.264167]  [<ffffffff802adc1f>] ? init_object+0x4f/0x90
[  117.269610]  [<ffffffff802bea06>] ? getname+0x36/0x200
[  117.274792]  [<ffffffff802cacd5>] ? alloc_fd+0x35/0x110
[  117.280062]  [<ffffffff802b4aea>] do_sys_open+0x5a/0xa0
[  117.285330]  [<ffffffff802b4b5b>] sys_open+0x1b/0x20
[  117.290332]  [<ffffffff8020b6ef>] system_call_fastpath+0x16/0x1b
[  117.296380] ---[ end trace 143ad804a8555637 ]---
[  118.927358] usb usb2: uevent

Config attached.

One of these could be suspected, in particular the tty ones:

 67dd824: hso: add new device id's
 3feeba1: Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
 5839b41: hso serial throttled tty kref fix.
 d45eb81: tty: Fix double grabbing of a spinlock
 fe41cbb: tty: Fix a kref leak in the HSO driver on re-open

	Ingo

View attachment "config" of type "text/plain" (62486 bytes)