[openib-general] Kernel oops when unloading ib_cm module with latest CM

[Hal Rosenstock]

This didn't occur before yerterday's CM change.

Mar  9 05:03:34 localhost kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000018
Mar  9 05:03:34 localhost kernel:  printing eip:
Mar  9 05:03:34 localhost kernel: d09472a7
Mar  9 05:03:34 localhost kernel: *pde = 00000000
Mar  9 05:03:34 localhost kernel: Oops: 0000 [#1]
Mar  9 05:03:34 localhost kernel: Modules linked in: ib_cm ib_umad ide_cd cdrom lp ipv6 autofs parport_pc parport uhci_hcd ehci_hcd ib_mthca ib_mad ib_core ohci_hcd eepro100 mii evdev usbcore
Mar  9 05:03:34 localhost kernel: CPU:    0
Mar  9 05:03:34 localhost kernel: EIP:    0060:[<d09472a7>]    Tainted: P      VLI
Mar  9 05:03:34 localhost kernel: EFLAGS: 00010286   (2.6.10)
Mar  9 05:03:34 localhost kernel: EIP is at ib_unregister_mad_agent+0x7/0x30 [ib_mad]
Mar  9 05:03:34 localhost kernel: eax: 00000000   ebx: c2eefa24   ecx: c1054660   edx: 00000000
Mar  9 05:03:34 localhost kernel: esi: 00000003   edi: c2eef9e0   ebp: cee7f000   esp: ce783ef0
Mar  9 05:03:34 localhost kernel: ds: 007b   es: 007b   ss: 0068
Mar  9 05:03:34 localhost kernel: Process modprobe (pid: 5105, threadinfo=ce782000 task=c147f550)
Mar  9 05:03:34 localhost kernel: Stack: ce783f08 d09e42cf 00000000 00000001 00000000 ce783f08 00000000 00010000
Mar  9 05:03:34 localhost kernel:        00000000 00000000 d09e6200 cee7f000 08049178 d09e61e4 d08c0cb1 cee7f000
Mar  9 05:03:34 localhost kernel:        cedb0160 c012f4b8 c2e55000 00000000 c015892d 00000286 00000000 d09e6200
Mar  9 05:03:34 localhost kernel: Call Trace:
Mar  9 05:03:34 localhost kernel:  [<d09e42cf>] cm_remove_one+0x9f/0xd0 [ib_cm]
Mar  9 05:03:34 localhost kernel:  [<d08c0cb1>] ib_unregister_client+0x211/0x220 [ib_core]
Mar  9 05:03:34 localhost kernel:  [<c012f4b8>] destroy_workqueue+0x58/0x1c0
Mar  9 05:03:34 localhost kernel:  [<c015892d>] unmap_region+0x9d/0xf0
Mar  9 05:03:34 localhost kernel:  [<d09e4326>] ib_cm_cleanup+0x26/0x28 [ib_cm]
Mar  9 05:03:34 localhost kernel:  [<c01387b8>] sys_delete_module+0x158/0x190
Mar  9 05:03:34 localhost kernel:  [<c0158db4>] sys_munmap+0x44/0x70
Mar  9 05:03:34 localhost kernel:  [<c0102fbd>] sysenter_past_esp+0x52/0x75
Mar  9 05:03:34 localhost kernel: Code: 40 df 94 d0 c7 44 24 08 09 02 00 00 c7 44 24 04 40 de 94 d0 89 44 24 0c e8 b7 0c 7d ef e9 60 fe ff ff 89 f6 83 ec 04 8b 44 24 08 <8b> 48 18 85 c9 74 12 83 e8 08 89 04 24 e8 a7 fb ff ff 5a 31 c0