2010-11-10 08:07:21

by Shan Wei

Subject: WARNING in tty_io.c

Modify start-ttys.conf to add ttyS0 device on my Fedora13 with 2.6.37-rc1+ kernel.
After rebooting system, got the following WARNING.


------------[ cut here ]------------
WARNING: at drivers/char/tty_io.c:1331 tty_open+0x20e/0x3b2()
Hardware name: Aspire SA80
Modules linked in: ipv6 uinput snd_intel8x0 snd_ac97_codec ac97_bus r8169 ppdev parport_pc snd_seq snd_seq_device snd_pcm sis900 mii snd_timer snd soundcore parport snd_page_alloc pcspkr ata_generic pata_acpi sata_sis pata_sis [last unloaded: scsi_wait_scan]
Pid: 117, comm: plymouthd Not tainted 2.6.37-rc1+ #4
Call Trace:
[<c044045c>] warn_slowpath_common+0x6a/0x7f
[<c062aff0>] ? tty_open+0x20e/0x3b2
[<c0440485>] warn_slowpath_null+0x14/0x18
[<c062aff0>] tty_open+0x20e/0x3b2
[<c04dc6c7>] chrdev_open+0xf3/0x110
[<c04d8688>] __dentry_open+0x141/0x237
[<c04d8833>] nameidata_to_filp+0x43/0x51
[<c04dc5d4>] ? chrdev_open+0x0/0x110
[<c04e25b8>] do_last+0x372/0x47f
[<c04e3b8d>] do_filp_open+0x19c/0x406
[<c04e5085>] ? do_vfs_ioctl+0x55e/0x5b4
[<c05b6232>] ? might_fault+0x1e/0x20
[<c04d8457>] do_sys_open+0x4d/0xcf
[<c0581f47>] ? selinux_file_ioctl+0x43/0x46
[<c04d8525>] sys_open+0x23/0x2b
[<c04097df>] sysenter_do_call+0x12/0x28
[<c07a0000>] ? init_intel_cacheinfo+0x6d/0x39e
---[ end trace eeb22dd7bedfb0b1 ]---

2010-11-18 06:13:57

by Greg KH

Subject: Re: WARNING in tty_io.c

On Wed, Nov 10, 2010 at 04:06:41PM +0800, Shan Wei wrote:
>
> Modify start-ttys.conf to add ttyS0 device on my Fedora13 with 2.6.37-rc1+ kernel.
> After rebooting system, got the following WARNING.
>
>
> ------------[ cut here ]------------
> WARNING: at drivers/char/tty_io.c:1331 tty_open+0x20e/0x3b2()
> Hardware name: Aspire SA80
> Modules linked in: ipv6 uinput snd_intel8x0 snd_ac97_codec ac97_bus r8169 ppdev parport_pc snd_seq snd_seq_device snd_pcm sis900 mii snd_timer snd soundcore parport snd_page_alloc pcspkr ata_generic pata_acpi sata_sis pata_sis [last unloaded: scsi_wait_scan]
> Pid: 117, comm: plymouthd Not tainted 2.6.37-rc1+ #4

Does this still happen in .37-rc2?

Alan, any ideas?

> Call Trace:
> [<c044045c>] warn_slowpath_common+0x6a/0x7f
> [<c062aff0>] ? tty_open+0x20e/0x3b2
> [<c0440485>] warn_slowpath_null+0x14/0x18
> [<c062aff0>] tty_open+0x20e/0x3b2
> [<c04dc6c7>] chrdev_open+0xf3/0x110
> [<c04d8688>] __dentry_open+0x141/0x237
> [<c04d8833>] nameidata_to_filp+0x43/0x51
> [<c04dc5d4>] ? chrdev_open+0x0/0x110
> [<c04e25b8>] do_last+0x372/0x47f
> [<c04e3b8d>] do_filp_open+0x19c/0x406
> [<c04e5085>] ? do_vfs_ioctl+0x55e/0x5b4
> [<c05b6232>] ? might_fault+0x1e/0x20
> [<c04d8457>] do_sys_open+0x4d/0xcf
> [<c0581f47>] ? selinux_file_ioctl+0x43/0x46
> [<c04d8525>] sys_open+0x23/0x2b
> [<c04097df>] sysenter_do_call+0x12/0x28
> [<c07a0000>] ? init_intel_cacheinfo+0x6d/0x39e
> ---[ end trace eeb22dd7bedfb0b1 ]---
>

2010-11-18 09:16:36

by Shan Wei

Subject: Re: WARNING in tty_io.c

Greg KH wrote, at 11/18/2010 02:14 PM:
> On Wed, Nov 10, 2010 at 04:06:41PM +0800, Shan Wei wrote:
>>
>> Modify start-ttys.conf to add ttyS0 device on my Fedora13 with 2.6.37-rc1+ kernel.
>> After rebooting system, got the following WARNING.
>>
>>
>> ------------[ cut here ]------------
>> WARNING: at drivers/char/tty_io.c:1331 tty_open+0x20e/0x3b2()
>> Hardware name: Aspire SA80
>> Modules linked in: ipv6 uinput snd_intel8x0 snd_ac97_codec ac97_bus r8169 ppdev parport_pc snd_seq snd_seq_device snd_pcm sis900 mii snd_timer snd soundcore parport snd_page_alloc pcspkr ata_generic pata_acpi sata_sis pata_sis [last unloaded: scsi_wait_scan]
>> Pid: 117, comm: plymouthd Not tainted 2.6.37-rc1+ #4
>
> Does this still happen in .37-rc2?

Good news.
It's not appreared in 2.6.37-rc2+ with top commit 59365d13.

Thanks again.

--
Best Regards
-----
Shan Wei


>
> Alan, any ideas?
>
>> Call Trace:
>> [<c044045c>] warn_slowpath_common+0x6a/0x7f
>> [<c062aff0>] ? tty_open+0x20e/0x3b2
>> [<c0440485>] warn_slowpath_null+0x14/0x18
>> [<c062aff0>] tty_open+0x20e/0x3b2
>> [<c04dc6c7>] chrdev_open+0xf3/0x110
>> [<c04d8688>] __dentry_open+0x141/0x237
>> [<c04d8833>] nameidata_to_filp+0x43/0x51
>> [<c04dc5d4>] ? chrdev_open+0x0/0x110
>> [<c04e25b8>] do_last+0x372/0x47f
>> [<c04e3b8d>] do_filp_open+0x19c/0x406
>> [<c04e5085>] ? do_vfs_ioctl+0x55e/0x5b4
>> [<c05b6232>] ? might_fault+0x1e/0x20
>> [<c04d8457>] do_sys_open+0x4d/0xcf
>> [<c0581f47>] ? selinux_file_ioctl+0x43/0x46
>> [<c04d8525>] sys_open+0x23/0x2b
>> [<c04097df>] sysenter_do_call+0x12/0x28
>> [<c07a0000>] ? init_intel_cacheinfo+0x6d/0x39e
>> ---[ end trace eeb22dd7bedfb0b1 ]---
>>
>