linux-kernel - [PATCH][next] scsi: hpsa: fix an uninitialized read and dereference of pointer dev

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Message-Id: <20190522083903.18849-1-colin.king@canonical.com>
Date:   Wed, 22 May 2019 09:39:03 +0100
From:   Colin King <colin.king@...onical.com>
To:     Don Brace <don.brace@...rosemi.com>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        esc.storagedev@...rosemi.com, linux-scsi@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] scsi: hpsa: fix an uninitialized read and dereference of pointer dev

From: Colin Ian King <colin.king@...onical.com>

Currently the check for a lockup_detected failure exits via the
label return_reset_status that reads and dereferences an uninitialized
pointer dev.  Fix this by ensuring dev is inintialized to null.

Addresses-Coverity: ("Uninitialized pointer read")
Fixes: 14991a5bade5 ("scsi: hpsa: correct device resets")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/scsi/hpsa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index c560a4532733..ac8338b0571b 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -5947,7 +5947,7 @@ static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
 	int rc = SUCCESS;
 	int i;
 	struct ctlr_info *h;
-	struct hpsa_scsi_dev_t *dev;
+	struct hpsa_scsi_dev_t *dev = NULL;
 	u8 reset_type;
 	char msg[48];
 	unsigned long flags;
-- 
2.20.1