scsi: lpfc: devloss timeout race condition caused null pointer reference

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A race condition between the context of devloss timeout handler and I/O
completion caused devloss timeout handler de-referencing pointer that had
been released.

Added the check in lpfc_sli_validate_fcp_iocb() on LPFC_IO_ON_TXCMPLQ to
capture the race condition of I/O completion and devloss timeout handler
attemption for aborting the I/O. Also, added check on lpfc_cmd->rdata
pointer before de-referenceing lpfc_cmd->rdata->pnode.

Also, added protection in lpfc_sli_abort_iocb() routine on driver performed
FCP I/O FLUSHING already under way before proceeding to aborting I/Os.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

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James Smart 2018-06-26 08:24:29 -07:00 • committed by Martin K. Petersen

parent 6871e8144f

commit b0e830125b

2 changed files with 14 additions and 4 deletions

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5

drivers/scsi/lpfc/lpfc_scsi.c

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13

drivers/scsi/lpfc/lpfc_sli.c

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