BUG: warning at lib/kref.c:32/kref_get()

Issue

• Following messages were logged in /var/log/messages at our customer's site.

Feb 15 13:19:36 server1 kernel: BUG: warning at lib/kref.c:32/kref_get() (Tainted: PF    )
Feb 15 13:19:36 server1 kernel:
Feb 15 13:19:36 server1 kernel: Call Trace:
Feb 15 13:19:36 server1 kernel:  [<ffffffff80036e5c>] kref_get+0x38/0x3d
Feb 15 13:19:36 server1 kernel:  [<ffffffff80057fb8>] kobject_get+0x12/0x17
Feb 15 13:19:36 server1 kernel:  [<ffffffff801bf76a>] get_device+0x17/0x20
Feb 15 13:19:36 server1 kernel:  [<ffffffff880750d8>] :scsi_mod:scsi_device_get+0x26/0x72
Feb 15 13:19:36 server1 kernel:  [<ffffffff880a73d3>] :sd_mod:__scsi_disk_get+0x16/0x2c
Feb 15 13:19:36 server1 kernel:  [<ffffffff880a8e09>] :sd_mod:sd_open+0x36/0x136
Feb 15 13:19:36 server1 kernel:  [<ffffffff8846b8cf>] :emcp:EmcpLnxUnconfigDeviceId+0x1df/0x430
Feb 15 13:19:36 server1 kernel:  [<ffffffff88461c06>] :emcp:EmcpLogEvent+0x76/0x2c0
Feb 15 13:19:36 server1 kernel:  [<ffffffff880317ae>] :jbd:journal_stop+0x1f3/0x1ff
Feb 15 13:19:36 server1 kernel:  [<ffffffff88055a9d>] :ext3:__ext3_journal_stop+0x1f/0x3d
Feb 15 13:19:36 server1 kernel:  [<ffffffff8804ff94>] :ext3:ext3_ordered_write_end+0xd7/0x116
Feb 15 13:19:36 server1 kernel:  [<ffffffff8002e2f2>] __wake_up+0x38/0x4f
Feb 15 13:19:36 server1 kernel:  [<ffffffff88463808>] :emcp:PowerDevOpenTail+0x78/0x90
Feb 15 13:19:36 server1 kernel:  [<ffffffff8846ace8>] :emcp:PowerDevOpen+0x198/0x1b0
Feb 15 13:19:36 server1 kernel:  [<ffffffff8846b6f0>] :emcp:EmcpLnxUnconfigDeviceId+0x0/0x430
Feb 15 13:19:36 server1 kernel:  [<ffffffff8846b6f0>] :emcp:EmcpLnxUnconfigDeviceId+0x0/0x430
Feb 15 13:19:37 server1 kernel:  [<ffffffff88470475>] :emcp:EmsUnconfigDeviceIdGuts+0x95/0x190
Feb 15 13:19:37 server1 kernel:  [<ffffffff88470d66>] :emcp:EmsConfigDeviceIdGuts+0x76/0x310
Feb 15 13:19:37 server1 kernel:  [<ffffffff88471084>] :emcp:PowerConfigDevGuts+0x84/0x140
Feb 15 13:19:37 server1 kernel:  [<ffffffff884714d0>] :emcp:emcpConfigDev+0x60/0x90
Feb 15 13:19:37 server1 kernel:  [<ffffffff88471662>] :emcp:emcp_open+0x162/0x4c0
Feb 15 13:19:37 server1 kernel:  [<ffffffff801c36a7>] kobj_lookup+0x132/0x19b
Feb 15 13:19:37 server1 kernel:  [<ffffffff800e3644>] do_open+0xa2/0x30f
Feb 15 13:19:37 server1 kernel:  [<ffffffff800e3b05>] blkdev_open+0x0/0x4f
Feb 15 13:19:37 server1 kernel:  [<ffffffff800e3b28>] blkdev_open+0x23/0x4f
Feb 15 13:19:37 server1 kernel:  [<ffffffff8001e88c>] __dentry_open+0xd9/0x1dc
Feb 15 13:19:37 server1 kernel:  [<ffffffff80027325>] do_filp_open+0x2a/0x38
Feb 15 13:19:37 server1 kernel:  [<ffffffff80019ce7>] do_sys_open+0x44/0xbe
Feb 15 13:19:37 server1 kernel:  [<ffffffff8005d116>] system_call+0x7e/0x83
Feb 15 13:19:37 server1 kernel:
Feb 15 13:19:37 server1 kernel: BUG: warning at lib/kref.c:32/kref_get() (Tainted: PF    )
Feb 15 13:19:37 server1 kernel:
Feb 15 13:19:37 server1 kernel: Call Trace:
Feb 15 13:19:37 server1 kernel:  [<ffffffff80036e5c>] kref_get+0x38/0x3d
Feb 15 13:19:37 server1 kernel:  [<ffffffff80057fb8>] kobject_get+0x12/0x17
Feb 15 13:19:37 server1 kernel:  [<ffffffff801c1e18>] class_device_get+0x14/0x1b
Feb 15 13:19:37 server1 kernel:  [<ffffffff880a73e0>] :sd_mod:__scsi_disk_get+0x23/0x2c
Feb 15 13:19:37 server1 kernel:  [<ffffffff880a8e09>] :sd_mod:sd_open+0x36/0x136
Feb 15 13:19:37 server1 kernel:  [<ffffffff8846b8cf>] :emcp:EmcpLnxUnconfigDeviceId+0x1df/0x430
Feb 15 13:19:37 server1 kernel:  [<ffffffff88461c06>] :emcp:EmcpLogEvent+0x76/0x2c0