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| author | James Smart <jsmart2021@gmail.com> | 2021-12-03 16:26:38 -0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-12-06 22:35:36 -0500 |
| commit | 7576d48c64f36f6fea9df2882f710a474fa35f40 (patch) | |
| tree | 680c1a131575fd7a97e992266896b51c4734b15a /drivers/scsi/lpfc | |
| parent | 2e81b1a374da5d6024208c16c4a5224a70cafa64 (diff) | |
| download | linux-stable-7576d48c64f36f6fea9df2882f710a474fa35f40.tar.gz linux-stable-7576d48c64f36f6fea9df2882f710a474fa35f40.tar.bz2 linux-stable-7576d48c64f36f6fea9df2882f710a474fa35f40.zip | |
scsi: lpfc: Fix lpfc_force_rscn ndlp kref imbalance
Issuing lpfc_force_rscn twice results in an ndlp kref use-after-free call
trace.
A prior patch reworked the get/put handling by ensuring nlp_get was done
before WQE submission and a put was done in the completion path.
Unfortunately, the issue_els_rscn path had a piece of legacy code that did
a nlp_put, causing an imbalance on the ref counts.
Fixed by removing the unnecessary legacy code snippet.
Link: https://lore.kernel.org/r/20211204002644.116455-4-jsmart2021@gmail.com
Fixes: 4430f7fd09ec ("scsi: lpfc: Rework locations of ndlp reference taking")
Cc: <stable@vger.kernel.org> # v5.11+
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>
Diffstat (limited to 'drivers/scsi/lpfc')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_els.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 67335aae683e..ba90ece8b81e 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -3538,11 +3538,6 @@ lpfc_issue_els_rscn(struct lpfc_vport *vport, uint8_t retry) return 1; } - /* This will cause the callback-function lpfc_cmpl_els_cmd to - * trigger the release of node. - */ - if (!(vport->fc_flag & FC_PT2PT)) - lpfc_nlp_put(ndlp); return 0; } |