Kernel panic with "BUG: unable to handle kernel NULL pointer dereference at 00000000000000d0" due to issue present in SCSI, IO command completions.

Solution Verified - Updated -

Issue

  • System crashed with following logs.

      [1200823.847904] list_add corruption. prev->next should be next (ffffffffbb0c1038), but was (null) (prev=ffff94ccdc22a978).
   :
   [1200835.855083] BUG: unable to handle kernel NULL pointer dereference at 00000000000000d0
   [1200835.855086] IP: [<ffffffffc016f77d>] dm_start_request+0x1d/0x140 [dm_mod]

Environment

  • Red Hat Enterprise Linux 7.5

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