FCoE target configured using fileio backend panics when probed by initiator

Solution Unverified - Updated -

Issue

  • When initiator probes the RHEL 6.3 target that is configured using fileio backend, it results in kernel panic:
crash> bt
PID: 3438   TASK: ffff880237c90080  CPU: 17  COMMAND: "LIO_fileio"
 #0 [ffff88022e2f3a30] machine_kexec at ffffffff8103281b
 #1 [ffff88022e2f3a90] crash_kexec at ffffffff810ba662
 #2 [ffff88022e2f3b60] oops_end at ffffffff81501290
 #3 [ffff88022e2f3b90] no_context at ffffffff81043bab
 #4 [ffff88022e2f3be0] __bad_area_nosemaphore at ffffffff81043e35
 #5 [ffff88022e2f3c30] bad_area_nosemaphore at ffffffff81043f03
 #6 [ffff88022e2f3c40] __do_page_fault at ffffffff81044661
 #7 [ffff88022e2f3d60] do_page_fault at ffffffff8150326e
 #8 [ffff88022e2f3d90] page_fault at ffffffff81500625
    [exception RIP: transport_processing_thread+276]
    RIP: ffffffffa0397574  RSP: ffff88022e2f3e40  RFLAGS: 00010296
    RAX: 0000000000001000  RBX: ffff88019573b440  RCX: ffff8801d92c8000
    RDX: ffff88043a227d84  RSI: 0000000000000246  RDI: ffff88019573b440
    RBP: ffff88022e2f3ee0   R8: 0000000000000000   R9: 0000000000000001
    R10: 0000000000000000  R11: 0000000000000000  R12: ffff88022e2f3e80
    R13: ffff88043a227c00  R14: ffff88043a227d84  R15: ffff88043a227d80
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #9 [ffff88022e2f3ee8] kthread at ffffffff81091d66
#10 [ffff88022e2f3f48] kernel_thread at ffffffff8100c14a
crash>

Environment

  • Red Hat Enterprise 6.3
  • FCoE Target with fileio backend

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