System crash at bdi_writeback_thread with 3rd party module CyProtectDrv enabled

Solution Verified - Updated -


  • System crashes frequently

        crash> bt
        PID: 165202   TASK: ffff8802baa92ab0  CPU: 0    COMMAND: "flush-253:42"
         #0 [ffff8803e7d67a60] machine_kexec at ffffffff810417ab
         #1 [ffff8803e7d67ac0] crash_kexec at ffffffff810d79c2
         #2 [ffff8803e7d67b90] oops_end at ffffffff81560310
         #3 [ffff8803e7d67bc0] no_context at ffffffff8105578b
         #4 [ffff8803e7d67c10] __bad_area_nosemaphore at ffffffff81055a15
         #5 [ffff8803e7d67c60] bad_area_nosemaphore at ffffffff81055ae3
         #6 [ffff8803e7d67c70] __do_page_fault at ffffffff810561fc
         #7 [ffff8803e7d67d90] do_page_fault at ffffffff815622ce
         #8 [ffff8803e7d67dc0] page_fault at ffffffff8155f265
            [exception RIP: bdi_writeback_thread+0x61]
            RIP: ffffffff811d14b1  RSP: ffff8803e7d67e70  RFLAGS: 00010282
            RAX: 0000000000000000  RBX: ffff8804378852e0  RCX: 0000000000000000
            RDX: 00000001018d6230  RSI: 0000000000000000  RDI: ffff8802baa92ab0
            RBP: ffff8803e7d67ee0   R8: ffff8803e7d64000   R9: 00000000ffffffff
            R10: 0000000000000000  R11: 0000000000000000  R12: 0000000000000000
            R13: ffff8802baa92ab0  R14: 0000000000000178  R15: 0000000000000001
            ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
         #9 [ffff8803e7d67ee8] kthread at ffffffff810abd70
        #10 [ffff8803e7d67f48] kernel_thread at ffffffff81567820


  • Red Hat Enterprise Linux 6.10
    • kernel-2.6.32-754.50.1.el6.x86_64
  • Third party module
    • CyProtectDrv

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