6.7-stable review patch. If anyone has any objections, please let me know.
------------------
From: Justin Tee <justin.tee@xxxxxxxxxxxx>
[ Upstream commit 1dec1311b9b6cc9c5fd26a77b936f542f03c51d1 ]
Smatch called out a warning for null checking a ptr that is assigned by
list_entry(). list_entry() does not return null and, if the list is empty,
can return an invalid ptr. Thus, the !psrp check does not execute properly.
drivers/scsi/lpfc/lpfc_els.c:2133 lpfc_cmpl_els_plogi()
warn: list_entry() does not return NULL 'prsp'
Replace list_entry() with list_get_first(), which does a list_empty() check
before returning the first entry.
Fixes: a3c3c0a806f1 ("scsi: lpfc: Validate ELS LS_ACC completion payload")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Closes: https://lore.kernel.org/linux-scsi/01b7568f-4ab4-4d56-bfa6-9ecc5fc261fe@moroto.mountain/
Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231031191224.150862-4-justintee8345@xxxxxxxxx
Reviewed-by: Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/scsi/lpfc/lpfc_els.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index f9627eddab08..0829fe6ddff8 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -2128,8 +2128,8 @@ lpfc_cmpl_els_plogi(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
NLP_EVT_DEVICE_RM);
} else {
/* Good status, call state machine */
- prsp = list_entry(cmdiocb->cmd_dmabuf->list.next,
- struct lpfc_dmabuf, list);
+ prsp = list_get_first(&cmdiocb->cmd_dmabuf->list,
+ struct lpfc_dmabuf, list);
if (!prsp)
goto out;
if (!lpfc_is_els_acc_rsp(prsp))
--
2.43.0
