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| author | James Smart <jsmart2021@gmail.com> | 2021-09-11 02:31:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-25 11:48:24 +0300 |
| commit | 814d3610c4ce86e8cf285b2cdac0057a42e82de5 (patch) | |
| tree | 80886c4076dde126f3dfc668f528a3b040dc7eaa /drivers/scsi | |
| parent | 269a4311b15f68d24e816f43f123888f241ed13d (diff) | |
| download | linux-814d3610c4ce86e8cf285b2cdac0057a42e82de5.tar.xz | |
scsi: lpfc: Fix list_add() corruption in lpfc_drain_txq()
[ Upstream commit 99154581b05c8fb22607afb7c3d66c1bace6aa5d ]
When parsing the txq list in lpfc_drain_txq(), the driver attempts to pass
the requests to the adapter. If such an attempt fails, a local "fail_msg"
string is set and a log message output. The job is then added to a
completions list for cancellation.
Processing of any further jobs from the txq list continues, but since
"fail_msg" remains set, jobs are added to the completions list regardless
of whether a wqe was passed to the adapter. If successfully added to
txcmplq, jobs are added to both lists resulting in list corruption.
Fix by clearing the fail_msg string after adding a job to the completions
list. This stops the subsequent jobs from being added to the completions
list unless they had an appropriate failure.
Link: https://lore.kernel.org/r/20210910233159.115896-2-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_sli.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 2fc671c8a638..8e689f06afc9 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -21162,6 +21162,7 @@ lpfc_drain_txq(struct lpfc_hba *phba) fail_msg, piocbq->iotag, piocbq->sli4_xritag); list_add_tail(&piocbq->list, &completions); + fail_msg = NULL; } spin_unlock_irqrestore(&pring->ring_lock, iflags); } |