scsi: hisi_sas: fix NULL deference when TMF timeouts

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If a TMF timeouts (maybe due to unlikely scenario of an expander being
unplugged when TMF for remote device is active), when we eventually try
to free the slot, we crash as we dereference the slot's task, which has
already been released.

As a fix, add checks in the slot release code for a NULL task.

Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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John Garry 2017-04-10 21:22:00 +08:00 • committed by Martin K. Petersen

parent 0844a3ff00

commit d3c4dd4e3d

1 changed files with 33 additions and 27 deletions

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drivers/scsi/hisi_sas/hisi_sas_main.c

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