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SubjectKernel 3.0: Instant kernel crash when mounting CIFS
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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