linux-kernel - [PATCH -next] scsi: qedf: Fix potential null pointer dereference

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Message-ID: <20240920020835.1857251-1-liaochen4@huawei.com>
Date: Fri, 20 Sep 2024 02:08:35 +0000
From: Liao Chen <liaochen4@...wei.com>
To: <GR-QLogic-Storage-Upstream@...vell.com>, <linux-scsi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: <skashyap@...vell.com>, <jhasan@...vell.com>,
	<James.Bottomley@...senPartnership.com>, <martin.petersen@...cle.com>,
	<bvanassche@....org>
Subject: [PATCH -next] scsi: qedf: Fix potential null pointer dereference

qedf is checked to be null in this if branch, accessing its member will
cause a null pointer dereference. As suggested by Bart, fix it by
deleting the logic since qedf cannot be NULL in this function.

Signed-off-by: Liao Chen <liaochen4@...wei.com>
---
 drivers/scsi/qedf/qedf_main.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c
index cf13148ba281..df756f3eef3e 100644
--- a/drivers/scsi/qedf/qedf_main.c
+++ b/drivers/scsi/qedf/qedf_main.c
@@ -4018,11 +4018,6 @@ void qedf_stag_change_work(struct work_struct *work)
 	struct qedf_ctx *qedf =
 	    container_of(work, struct qedf_ctx, stag_work.work);
 
-	if (!qedf) {
-		QEDF_ERR(&qedf->dbg_ctx, "qedf is NULL");
-		return;
-	}
-
 	if (test_bit(QEDF_IN_RECOVERY, &qedf->flags)) {
 		QEDF_ERR(&qedf->dbg_ctx,
 			 "Already is in recovery, hence not calling software context reset.\n");
-- 
2.34.1