[PATCH AUTOSEL 6.2 14/30] scsi: lpfc: Check kzalloc() in lpfc_sli4_cgn_params_read()

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From: Justin Tee <justin.tee@xxxxxxxxxxxx>

[ Upstream commit 312320b0e0ec21249a17645683fe5304d796aec1 ]

If kzalloc() fails in lpfc_sli4_cgn_params_read(), then we rely on
lpfc_read_object()'s routine to NULL check pdata.

Currently, an early return error is thrown from lpfc_read_object() to
protect us from NULL ptr dereference, but the errno code is -ENODEV.

Change the errno code to a more appropriate -ENOMEM.

Reported-by: Kang Chen <void0red@xxxxxxxxx>
Link: https://lore.kernel.org/all/20230226102338.3362585-1-void0red@xxxxxxxxx
Signed-off-by: Justin Tee <justin.tee@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230228044336.5195-1-justintee8345@xxxxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/scsi/lpfc/lpfc_init.c | 2 ++
 drivers/scsi/lpfc/lpfc_sli.c  | 4 ----
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 3fbd3bec26fc1..eeb73da754d0d 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -7235,6 +7235,8 @@ lpfc_sli4_cgn_params_read(struct lpfc_hba *phba)
 	/* Find out if the FW has a new set of congestion parameters. */
 	len = sizeof(struct lpfc_cgn_param);
 	pdata = kzalloc(len, GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
 	ret = lpfc_read_object(phba, (char *)LPFC_PORT_CFG_NAME,
 			       pdata, len);
 
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 55a0d4013439f..3aa7206537de7 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -22113,10 +22113,6 @@ lpfc_read_object(struct lpfc_hba *phba, char *rdobject, uint32_t *datap,
 	struct lpfc_dmabuf *pcmd;
 	u32 rd_object_name[LPFC_MBX_OBJECT_NAME_LEN_DW] = {0};
 
-	/* sanity check on queue memory */
-	if (!datap)
-		return -ENODEV;
-
 	mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
 	if (!mbox)
 		return -ENOMEM;
-- 
2.39.2




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