Hello, Libor!
Every once in a while, when I run ttcp
I get a kernel NULL pointer dereference from SDP
I compiled the ttcp.aio test with
gcc -I../../../linux-kernel/infiniband/ulp/sdp ttcp.aio.c -O2 -o ttcp.aio.x
-laio
I run ttcp on the server as
./ttcp.aio.x -r -l 100 -a 10
and the client as
./ttcp.aio.x -t -l 100 -n 100 -a 10 11.4.8.155
I repeated this test several times, sometimes getting
ttcp-t: Event error <-32> <5275648>
messages and sometimes not.
It was the server that finally crashed.
My kernel is 2.6.11 + latest openib svn (rev 2171).
The log file leading to the crash is below:
Apr 18 17:34:11 swlab155 kernel: ERR: : IOCB <0> cancel <0> flag <0040> size
<1:0:1>
Apr 18 17:34:22 swlab155 kernel: ERR: : IOCB <0> cancel <0> flag <0040> size
<100:0:100>
Apr 18 17:34:41 swlab155 kernel: ERR: : VMA lock <528000:100> error <-12>
<1:8:8>
Apr 18 17:34:41 swlab155 kernel: ERR: : VMA lock <52c000:100> error <-12>
<1:8:8>
Apr 18 17:34:49 swlab155 kernel: ERR: : VMA lock <528000:100> error <-12>
<1:8:8>
Apr 18 17:34:49 swlab155 kernel: ERR: : VMA lock <52c000:100> error <-12>
<1:8:8>
Apr 18 17:34:59 swlab155 kernel: ERR: : VMA lock <528000:100> error <-12>
<1:8:8>
Apr 18 17:34:59 swlab155 kernel: ERR: : VMA lock <52c000:100> error <-12>
<1:8:8>
Apr 18 17:34:59 swlab155 kernel: WARN: : Unexpected conn state. conn <9> state
<ff01:fd01>
Apr 18 17:35:22 swlab155 kernel: ERR: : IOCB <0> cancel <0> flag <0040> size
<100:0:100>
Apr 18 17:35:34 swlab155 last message repeated 5 times
Apr 18 17:35:44 swlab155 kernel: ERR: : VMA lock <528000:100> error <-12>
<1:8:8>
Apr 18 17:35:44 swlab155 kernel: ERR: : VMA lock <52c000:100> error <-12>
<1:8:8>
Apr 18 17:35:52 swlab155 kernel: ERR: : VMA lock <528000:100> error <-12>
<1:8:8>
Apr 18 17:35:52 swlab155 kernel: ERR: : VMA lock <52c000:100> error <-12>
<1:8:8>
Apr 18 17:35:52 swlab155 kernel: WARN: : Cancel read with no IOCB.
<2:0:00000005>
Apr 18 17:35:52 swlab155 kernel: Unable to handle kernel NULL pointer
dereference at 0000000000000038 RIP:
Apr 18 17:35:52 swlab155 kernel: <ffffffff80389f5e>{_spin_lock_irqsave+9}
Apr 18 17:35:52 swlab155 kernel: PGD 15cb56067 PUD 15cbb4067 PMD 0
Apr 18 17:35:52 swlab155 kernel: Oops: 0002 [1] SMP
Apr 18 17:35:52 swlab155 kernel: CPU 0
Apr 18 17:35:52 swlab155 kernel: Modules linked in: ib_sdp ib_cm ib_ipoib ib_sa
ib_umad ib_mthca ib_mad ib_core
Apr 18 17:35:52 swlab155 kernel: Pid: 6, comm: events/0 Not tainted
2.6.11-openib
Apr 18 17:35:52 swlab155 kernel: RIP: 0010:[_spin_lock_irqsave+9/27]
<ffffffff80389f5e>{_spin_lock_irqsave+9}
Apr 18 17:35:52 swlab155 kernel: RIP: 0010:[<ffffffff80389f5e>]
<ffffffff80389f5e>{_spin_lock_irqsave+9}
Apr 18 17:35:52 swlab155 kernel: RSP: 0000:ffff8100dfe9fe08 EFLAGS: 00010092
Apr 18 17:35:52 swlab155 kernel: RAX: 0000000000000064 RBX: 0000000000000000
RCX: ffff81015c596528
Apr 18 17:35:52 swlab155 kernel: RDX: 0000000000000000 RSI: 0000000000000064
RDI: 0000000000000038
Apr 18 17:35:52 swlab155 kernel: RBP: ffff81014dd23080 R08: ffff8100dfe9e000
R09: 0000000000000000
Apr 18 17:35:52 swlab155 kernel: R10: 00000000ffffffff R11: 0000000000000000
R12: 0000000000000068
Apr 18 17:35:52 swlab155 kernel: R13: 0000000000000064 R14: 0000000000000038
R15: 0000000000000000
Apr 18 17:35:52 swlab155 kernel: FS: 0000000000000000(0000)
GS:ffffffff80522c80(0000) knlGS:0000000000000000
Apr 18 17:35:52 swlab155 kernel: CS: 0010 DS: 0018 ES: 0018 CR0:
000000008005003b
Apr 18 17:35:52 swlab155 kernel: CR2: 0000000000000038 CR3: 000000015c626000
CR4: 00000000000006e0
Apr 18 17:35:52 swlab155 kernel: Process events/0 (pid: 6, threadinfo
ffff8100dfe9e000, task ffff8100dff02750)
Apr 18 17:35:52 swlab155 kernel: Stack: 0000000000000292 ffffffff8018663b
0000000000000286 ffff81014dec1680
Apr 18 17:35:52 swlab155 kernel: ffff81014dec1718 ffff8100dffa2000
ffff81014dec1680 0000000000000292
Apr 18 17:35:52 swlab155 kernel: ffffffff8804a8c2 ffffffff8804a956
Apr 18 17:35:52 swlab155 kernel: Call
Trace:<ffffffff8018663b>{aio_complete+129}
<ffffffff8804a8c2>{:ib_sdp:do_iocb_complete+0}
Apr 18 17:35:52 swlab155 kernel:
<ffffffff8804a956>{:ib_sdp:do_iocb_complete+148}
<ffffffff80140b1f>{worker_thread+476}
Apr 18 17:35:52 swlab155 kernel:
<ffffffff8012d10b>{default_wake_function+0}
<ffffffff8012d10b>{default_wake_function+0}
Apr 18 17:35:52 swlab155 kernel: <ffffffff80140943>{worker_thread+0}
<ffffffff80144a12>{kthread+206}
Apr 18 17:35:52 swlab155 kernel: <ffffffff8010dc43>{child_rip+8}
<ffffffff80144944>{kthread+0}
Apr 18 17:35:52 swlab155 kernel: <ffffffff8010dc3b>{child_rip+0}
Apr 18 17:35:52 swlab155 kernel:
Apr 18 17:35:52 swlab155 kernel: Code: f0 fe 0f 0f 88 8b 01 00 00 48 8b 04 24
48 83 c4 08 c3 fa f0
Apr 18 17:35:52 swlab155 kernel: RIP <ffffffff80389f5e>{_spin_lock_irqsave+9}
RSP <ffff8100dfe9fe08>
Apr 18 17:35:52 swlab155 kernel: CR2: 0000000000000038
--
MST - Michael S. Tsirkin
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