linux-kernel - [PATCH 4.4 27/62] scsi: fcoe: Memory leak fix in fcoe_sysfs_fcf

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Message-Id: <20200901150922.089105488@linuxfoundation.org>
Date:   Tue,  1 Sep 2020 17:10:10 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Girish Basrur <gbasrur@...vell.com>,
        Santosh Vernekar <svernekar@...vell.com>,
        Saurav Kashyap <skashyap@...vell.com>,
        Shyam Sundar <ssundar@...vell.com>,
        Javed Hasan <jhasan@...vell.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 27/62] scsi: fcoe: Memory leak fix in fcoe_sysfs_fcf_del()

From: Javed Hasan <jhasan@...vell.com>

[ Upstream commit e95b4789ff4380733006836d28e554dc296b2298 ]

In fcoe_sysfs_fcf_del(), we first deleted the fcf from the list and then
freed it if ctlr_dev was not NULL. This was causing a memory leak.

Free the fcf even if ctlr_dev is NULL.

Link: https://lore.kernel.org/r/20200729081824.30996-3-jhasan@marvell.com
Reviewed-by: Girish Basrur <gbasrur@...vell.com>
Reviewed-by: Santosh Vernekar <svernekar@...vell.com>
Reviewed-by: Saurav Kashyap <skashyap@...vell.com>
Reviewed-by: Shyam Sundar <ssundar@...vell.com>
Signed-off-by: Javed Hasan <jhasan@...vell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/scsi/fcoe/fcoe_ctlr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c
index 3bc610d160f57..53afdbe17d71d 100644
--- a/drivers/scsi/fcoe/fcoe_ctlr.c
+++ b/drivers/scsi/fcoe/fcoe_ctlr.c
@@ -264,9 +264,9 @@ static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new)
 		WARN_ON(!fcf_dev);
 		new->fcf_dev = NULL;
 		fcoe_fcf_device_delete(fcf_dev);
-		kfree(new);
 		mutex_unlock(&cdev->lock);
 	}
+	kfree(new);
 }
 
 /**
-- 
2.25.1