Kernel panic at lock_kernel() function due to unassign module seso

Solution Unverified - Updated -

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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