Issue

System with IBM "lin_tape" module version 1.76.0 crashes with the error "BUG: unable to handle kernel NULL pointer dereference at 0000000000000078" at "elv_may_queue+0x10/0x20" kernel function:

crash> log
lin_tape: detected device at host 8, channel 0, id 2, lun 0
IBM 03592E07    36A5
lin_tape: IBMtape5 removed.
BUG: unable to handle kernel NULL pointer dereference at 0000000000000078
IP: [<ffffffff8124e710>] elv_may_queue+0x10/0x20
PGD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:20/0000:20:02.0/0000:24:00.1/host8/rport-8:0-2/target8:0:2/8:0:2:0/type
CPU 5 
Modules linked in: mmfs26(U) mmfslinux(U) tracedev(U) ... lin_tape(U) ...