[ofa-general] kernel oops when killing opensm

[Ami Perlmutter]

cat /etc/issue
Fedora Core release 6 (Zod)
Kernel \r on an \m

uname -a
Linux sw185.lab.mtl.com 2.6.18-1.2798.fc6 #1 SMP Mon Oct 16 14:39:22 EDT
2006 x86_64 x86_64 x86_64 GNU/Linux


ib_mad: Method 1 already in use
general protection fault: 0000 [1] SMP
last sysfs file: /class/infiniband_mad/umad0/port
CPU 1
Modules linked in: nfsd exportfs autofs4 hidp nfs lockd fscache nfs_acl
rfcomm l2cap bluetooth sunrpc rdma_ucm(U) rds(U) ib_sdp(U) rdma_cm(U)
iw_cm(U) ib_addr(U) ib_local_sa(U) ib_ipoib(U) ib_cm(U) ib_sa(U)
ib_uverbs(U) ib_umad(U) ipv6 dm_mirror dm_multipath dm_mod video sbs
i2c_ec button battery asus_acpi ac parport_pc lp parport i2c_nforce2
i2c_core ide_cd sg k8_edac edac_mc cdrom shpchp ib_mthca(U) ib_mad(U)
ib_core(U) forcedeth floppy serio_raw pcspkr sata_nv libata sd_mod
scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
Pid: 16190, comm: opensm Not tainted 2.6.18-1.2798.fc6 #1
RIP: 0010:[<ffffffff8033eaa4>]  [<ffffffff8033eaa4>] list_del+0x1/0x71
RSP: 0018:ffff8101084d3d88  EFLAGS: 00010002
RAX: ffff81011e9a0040 RBX: ffff810077fa2c50 RCX: ffff8100dffdba80
RDX: 00000000ffffffff RSI: 0012020602040200 RDI: 0012020602040210
RBP: 0012020602040200 R08: ffff810077fa2b10 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0012020602040200
R13: ffff810077fa2a10 R14: 0000000000000005 R15: 0000000000000000
FS:  00002aaaab5081d0(0000) GS:ffff8100036581c0(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 000000311760af20 CR3: 0000000046624000 CR4: 00000000000006e0
Process opensm (pid: 16190, threadinfo ffff8101084d2000, task
ffff81011e9a0040)
Stack:  ffff810077fa2c50 ffffffff88344395 0000000000000007
ffff8101084d3e18
 ffff810077fa2c00 ffffffff8834446e ffff810003022450 ffff810077fa2a00
 ffff8101084d3df0 00007fff77a97aac 0000000000000005 ffffffff8814c2f7
Call Trace:
 [<ffffffff88344395>] :ib_umad:dequeue_send+0x23/0x30
 [<ffffffff8834446e>] :ib_umad:send_handler+0x26/0x7b
 [<ffffffff8814c2f7>] :ib_mad:ib_unregister_mad_agent+0x140/0x454
 [<ffffffff88344acc>] :ib_umad:ib_umad_ioctl+0x201/0x233
 [<ffffffff8024068a>] do_ioctl+0x21/0x6b
 [<ffffffff80230101>] vfs_ioctl+0x256/0x26f
 [<ffffffff8024aec5>] sys_ioctl+0x59/0x78
 [<ffffffff8025c00e>] system_call+0x7e/0x83
DWARF2 unwinder stuck at system_call+0x7e/0x83
Leftover inexact backtrace:


Code: 48 8b 47 08 48 89 fb 48 8b 10 48 39 fa 74 1b 48 89 fe 31 c0
RIP  [<ffffffff8033eaa4>] list_del+0x1/0x71
 RSP <ffff8101084d3d88>
 <3>BUG: sleeping function called from invalid context at
kernel/rwsem.c:20
in_atomic():0, irqs_disabled():1

Call Trace:
 [<ffffffff8026929b>] show_trace+0x34/0x47
 [<ffffffff802692c0>] dump_stack+0x12/0x17
 [<ffffffff8029dc68>] down_read+0x15/0x23
 [<ffffffff80296254>] blocking_notifier_call_chain+0x13/0x36
 [<ffffffff80214e4b>] do_exit+0x1f/0x8c2
 [<ffffffff802695b3>] kernel_math_error+0x0/0x90
 [<0000000000000340>]