Kernel panic at lock_kernel() function due to unassign module seso
Issue
- Server hang with below call trace.
crash> bt
PID: 35687 TASK: ffff8806d06d4ae0 CPU: 0 COMMAND: "ovpath"
#0 [ffff88003e807d70] machine_kexec at ffffffff81035d6b
#1 [ffff88003e807dd0] crash_kexec at ffffffff810c0e22
#2 [ffff88003e807ea0] panic at ffffffff8150dab3
#3 [ffff88003e807f20] do_nmi at ffffffff81511adb
#4 [ffff88003e807f50] nmi at ffffffff81511240
[exception RIP: lock_kernel+46]
RIP: ffffffff81510d1e RSP: ffff88083fb6fdd8 RFLAGS: 00000287
RAX: 0000000000000000 RBX: ffff8806ac4d8818 RCX: 0000000000000dac
RDX: 0000000000000db0 RSI: 00000000000000d0 RDI: 0000000000000000
RBP: ffff88083fb6fdd8 R8: 0000000000000005 R9: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8802dbc338c0
R13: ffff8806ac4d8858 R14: ffff8806d06d4ae0 R15: ffff8801080ac298
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
--- <NMI exception stack> ---
#5 [ffff88083fb6fdd8] lock_kernel at ffffffff81510d1e
#6 [ffff88083fb6fde0] __posix_lock_file at ffffffff811cff52
#7 [ffff88083fb6fe40] vfs_lock_file at ffffffff811d042b
#8 [ffff88083fb6fe50] fcntl_setlk at ffffffff811d0667
#9 [ffff88083fb6ff30] sys_fcntl at ffffffff81194b07
#10 [ffff88083fb6ff80] system_call_fastpath at ffffffff8100b072
RIP: 00000033efedba15 RSP: 00007fffa3557958 RFLAGS: 00010202
RAX: 0000000000000048 RBX: ffffffff8100b072 RCX: 000000000000003b
RDX: 00007fffa3557a70 RSI: 0000000000000007 RDI: 0000000000000003
RBP: 0000000000000003 R8: 0000000000c06ac8 R9: 0000000000008b67
R10: 00007fffa3557820 R11: 0000000000000246 R12: 0000000000c12ac0
R13: 0000000000c12aa0 R14: 0000000000c12b08 R15: 0000000000c12ad0
ORIG_RAX: 0000000000000048 CS: 0033 SS: 002b
crash>
Environment
- Red Hat Enterprise Linux 6
seso P(U)
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