[openib-general] ipoib oops

[Michael S. Tsirkin]

Hi!
I saw this in /var/log/messages recently.
Unfortunately I cant say exactly what I did to trigger this problem.
Roland, its the same thing we were seeing a couple of months ago that went
unresolved, isnt it?

Unable to handle kernel NULL pointer dereference at 0000000000000488 RIP:
<ffffffff88040154>{:ib_ipoib:ipoib_mcast_join_finish+100}
PGD 1775cc067 PUD 177a21067 PMD 0
Oops: 0000 [1] SMP
CPU 0
Modules linked in: ib_sdp ib_cm ib_ipoib ib_sa ib_umad ib_mthca ib_mad ib_core
Pid: 12176, comm: ib_mad1 Not tainted 2.6.14 #4
RIP: 0010:[<ffffffff88040154>] <ffffffff88040154>{:ib_ipoib:ipoib_mcast_join_finish+100}
RSP: 0000:ffff810178d59c58  EFLAGS: 00010282
RAX: 0000000052010000 RBX: 0000000000000000 RCX: 0000000000000010
RDX: ffff8101536b77c0 RSI: ffff8101536b77c0 RDI: ffff8101536b77c0
RBP: ffff8101536b77c0 R08: 0000000000000000 R09: ffff810178d59d38
R10: ffff810178d59df8 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000480 R14: 0000000000000000 R15: ffff810152a32298
FS:  0000000000000000(0000) GS:ffffffff805ff800(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000488 CR3: 0000000154c92000 CR4: 00000000000006e0
Process ib_mad1 (pid: 12176, threadinfo ffff810178d58000, task ffff81017c587580)
Stack: ffff810178d59c90 0000000000000282 ffff810178ae6840 0000000000000286
       ffff81017ca7b400 0000000000000286 ffff81017e825e10 ffff81017560a3c0
       ffff81017e825e10 ffff810176c01000
Call Trace:<ffffffff880410c8>{:ib_ipoib:ipoib_mcast_join_complete+56}
       <ffffffff880021d8>{:ib_core:ib_unpack+200} <ffffffff88037c4c>{:ib_sa:ib_sa_mcmember_rec_callback+76}
       <ffffffff88037472>{:ib_sa:recv_handler+66} <ffffffff8801014d>{:ib_mad:ib_mad_completion_handler+957}
       <ffffffff8800fd90>{:ib_mad:ib_mad_completion_handler+0}
       <ffffffff80146fac>{worker_thread+476} <ffffffff80131150>{default_wake_function+0}
       <ffffffff8012df43>{__wake_up_common+67} <ffffffff80131150>{default_wake_function+0}
       <ffffffff8014b4b0>{keventd_create_kthread+0} <ffffffff80146dd0>{worker_thread+0}
       <ffffffff8014b4b0>{keventd_create_kthread+0} <ffffffff8014b609>{kthread+217}
       <ffffffff8010e7a6>{child_rip+8} <ffffffff8014b4b0>{keventd_create_kthread+0}
       <ffffffff8014b530>{kthread+0} <ffffffff8010e79e>{child_rip+0}



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MST