On a other computer slightly different maybe cause of the slightly older kernel? :
May 12 04:57:04 ict143 kernel: [162817.458671] Pid: 331, comm: cp Tainted: P           (2.6.32-30-generic #59-Ubuntu) HP Compaq dc7800p Small Form Factor
May 12 04:57:04 ict143 kernel: [162817.458674] EIP: 0060:[<c02f474a>] EFLAGS: 00210246 CPU: 0
May 12 04:57:04 ict143 kernel: [162817.458677] EIP is at wait_for_key_construction+0x2a/0x70
May 12 04:57:04 ict143 kernel: [162817.458679] EAX: 00000000 EBX: 00000000 ECX: c02f4790 EDX: 00000000
May 12 04:57:04 ict143 kernel: [162817.458682] ESI: 00000002 EDI: f15e2700 EBP: c89cdb18 ESP: c89cdb0c
May 12 04:57:04 ict143 kernel: [162817.458684]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
May 12 04:57:04 ict143 kernel: [162817.458690]  f8d7a8a0 00000000 f2128e00 c89cdb40 c02f50da 00000000 00000000 00000000
May 12 04:57:04 ict143 kernel: [162817.458697] <0> 00000000 f8d6cfec ef963cc0 ef963cc0 f2128e00 c89cdb6c f8d663dc ef963d0f
May 12 04:57:04 ict143 kernel: [162817.458704] <0> f8d6cfe2 0000014b f6815780 f6815780 f15e27a2 f15e2700 00000800 00004058
May 12 04:57:04 ict143 kernel: [162817.458715]  [<c02f50da>] ? request_key+0x5a/0x90
May 12 04:57:04 ict143 kernel: [162817.458725]  [<f8d663dc>] ? cifs_get_spnego_key+0x17c/0x1d0 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458733]  [<f8d64dfd>] ? CIFS_SessSetup+0x66d/0xc10 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458738]  [<c03b38fe>] ? extract_buf+0x7e/0xe0
May 12 04:57:04 ict143 kernel: [162817.458745]  [<f8d4ca69>] ? cifs_setup_session+0x69/0x1a0 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458751]  [<f8d435eb>] ? cifs_reconnect_tcon+0x1ab/0x280 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458757]  [<f8d436e4>] ? smb_init+0x24/0x80 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458764]  [<f8d47375>] ? CIFSSMBUnixQPathInfo+0x55/0x250 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458771]  [<f8d58a3e>] ? cifs_get_inode_info_unix+0x5e/0x100 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458776]  [<c013087c>] ? kmap_atomic_prot+0x4c/0xf0
May 12 04:57:04 ict143 kernel: [162817.458783]  [<f8d518b5>] ? build_path_from_dentry+0xa5/0x1e0 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458790]  [<f8d5198c>] ? build_path_from_dentry+0x17c/0x1e0 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458795]  [<c01d0c37>] ? get_page_from_freelist+0x147/0x360
May 12 04:57:04 ict143 kernel: [162817.458800]  [<c058f4ed>] ? _spin_lock+0xd/0x10
May 12 04:57:04 ict143 kernel: [162817.458807]  [<f8d58cd4>] ? cifs_revalidate+0x1f4/0x3e0 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458811]  [<c0203a4a>] ? __mem_cgroup_commit_charge+0x4a/0xc0
May 12 04:57:04 ict143 kernel: [162817.458818]  [<f8d51f0f>] ? cifs_d_revalidate+0x1f/0xe0 [cifs]
May 12 04:57:04 ict143 kernel: [162817.458822]  [<c02141e1>] ? do_lookup+0x41/0xc0
May 12 04:57:04 ict143 kernel: [162817.458826]  [<c021259f>] ? generic_permission+0x1f/0xa0
May 12 04:57:04 ict143 kernel: [162817.458830]  [<c021467d>] ? __link_path_walk+0x15d/0xca0
May 12 04:57:04 ict143 kernel: [162817.458834]  [<c01e82a8>] ? handle_mm_fault+0x338/0x390
May 12 04:57:04 ict143 kernel: [162817.458837]  [<c02153d4>] ? path_walk+0x54/0xc0
May 12 04:57:04 ict143 kernel: [162817.458841]  [<c0215559>] ? do_path_lookup+0x59/0x90
May 12 04:57:04 ict143 kernel: [162817.458844]  [<c02160a1>] ? user_path_at+0x41/0x80
May 12 04:57:04 ict143 kernel: [162817.458848]  [<c0203ce5>] ? mem_cgroup_update_mapped_file_stat+0x35/0x90
May 12 04:57:04 ict143 kernel: [162817.458851]  [<c01e67a8>] ? __do_fault+0x3a8/0x490
May 12 04:57:04 ict143 kernel: [162817.458855]  [<c020de4a>] ? vfs_fstatat+0x3a/0x70
May 12 04:57:04 ict143 kernel: [162817.458858]  [<c020dfa0>] ? vfs_stat+0x20/0x30
May 12 04:57:04 ict143 kernel: [162817.458862]  [<c020dfc9>] ? sys_stat64+0x19/0x30
May 12 04:57:04 ict143 kernel: [162817.458866]  [<c058fb10>] ? do_device_not_available+0x0/0x60
May 12 04:57:04 ict143 kernel: [162817.458869]  [<c010b0f3>] ? init_fpu+0x183/0x1c0
May 12 04:57:04 ict143 kernel: [162817.458873]  [<c0591920>] ? do_page_fault+0x160/0x3a0
May 12 04:57:04 ict143 kernel: [162817.458876]  [<c058fb10>] ? do_device_not_available+0x0/0x60
May 12 04:57:04 ict143 kernel: [162817.458880]  [<c0104c89>] ? math_state_restore+0x39/0x60
May 12 04:57:04 ict143 kernel: [162817.458884]  [<c058fb5d>] ? do_device_not_available+0x4d/0x60
May 12 04:57:04 ict143 kernel: [162817.458887]  [<c01033ec>] ? syscall_call+0x7/0xb
May 12 04:57:04 ict143 kernel: [162817.458891]  [<c0590000>] ? do_general_protection+0x10/0x170
May 12 04:57:04 ict143 kernel: [162817.458941] ---[ end trace 7c74f71ccabcff3e ]---