linux-kernel - Re: Kernel 3.0: Instant kernel crash when mounting CIFS

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Date:	Mon, 15 Aug 2011 11:18:38 +0200 (CEST)
From:	Jesper Juhl <jj@...osbits.net>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
cc:	linux-kernel@...r.kernel.org, Alan Piszcz <ap@...arrain.com>,
	Steve French <sfrench@...ba.org>, linux-cifs@...r.kernel.org
Subject: Re: Kernel 3.0: Instant kernel crash when mounting CIFS


Adding some more CIFS people to Cc.


On Mon, 15 Aug 2011, Justin Piszcz wrote:

> Hi,
> 
> Is this normal/is there a limitation on CIFS mounts? I do not have the full
> crash output, I would need to take a picture of the screen, but its completely
> reproducible, crashes every time..  thoughts?
> 
> Aug 14 05:16:41 box kernel: [518217.158195] df              D 0000000000000000
> 0  5465  11246 0x00000004
> Aug 14 05:16:41 box kernel: [518217.158200]  ffff88061f19c090 0000000000000082
> 0000000000000002 ffff880600000000
> Aug 14 05:16:41 box kernel: [518217.158206]  ffff8806275accf0 0000000000004000
> ffff88058513ffd8 ffff88058513ffd8
> Aug 14 05:16:41 box kernel: [518217.158211]  ffff88058513fdf8 ffff880627076240
> 000000000000002f 0000000000000000
> Aug 14 05:16:41 box kernel: [518217.158217] Call Trace:
> Aug 14 05:16:41 box kernel: [518217.158226]  [<ffffffff810ca086>] ?
> do_lookup+0x46/0x310
> Aug 14 05:16:41 box kernel: [518217.158231]  [<ffffffff810c7e9d>] ?
> acl_permission_check+0x4d/0xb0
> Aug 14 05:16:41 box kernel: [518217.158239]  [<ffffffff815b2448>] ?
> __mutex_lock_slowpath+0xc8/0x140
> Aug 14 05:16:41 box kernel: [518217.158243]  [<ffffffff815b1fea>] ?
> mutex_lock+0x1a/0x40
> Aug 14 05:16:41 box kernel: [518217.158250]  [<ffffffff811ec969>] ?
> cifs_reconnect_tcon+0x1a9/0x320
> Aug 14 05:16:41 box kernel: [518217.158254]  [<ffffffff811ecba3>] ?
> smb_init+0x33/0x90
> Aug 14 05:16:41 box kernel: [518217.158258]  [<ffffffff811f30e0>] ?
> CIFSSMBQFSInfo+0x60/0x210
> Aug 14 05:16:41 box kernel: [518217.158262]  [<ffffffff811eb86e>] ?
> cifs_statfs+0xce/0x170
> Aug 14 05:16:41 box kernel: [518217.158268]  [<ffffffff810e5797>] ?
> statfs_by_dentry+0x67/0x100
> Aug 14 05:16:41 box kernel: [518217.158272]  [<ffffffff810e5845>] ?
> vfs_statfs+0x15/0x90
> Aug 14 05:16:41 box kernel: [518217.158275]  [<ffffffff810e58f0>] ?
> user_statfs+0x30/0x50
> Aug 14 05:16:41 box kernel: [518217.158279]  [<ffffffff810e5972>] ?
> sys_statfs+0x12/0x30
> Aug 14 05:16:41 box kernel: [518217.158284]  [<ffffffff815b3b7b>] ?
> system_call_fastpath+0x16/0x1b
> 
> Then it hangs up, on my machine it actually panics and in both cases all I/O
> stops and the machine is unusable.  This is from simply mounting a CIFS share.
> The share sizes are 18T and 28T, is there a limitation on the size that would
> cause the kernel to crash like that?
> 
> mount.cifs //l1/drve /mnt_pnt -o user=myusername,pass=mypassword, then
> df -h or ls /mnt_pnt instant kernel panic. :(
> 
> Remote host is Windows 7 64-bit.
> 
> Justin.
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-- 
Jesper Juhl <jj@...osbits.net>       http://www.chaosbits.net/
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