From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 3 Feb 2016 15:34:00 +0000 (-0200)
Subject: xc2028: unlock on error in xc2028_set_config()
X-Git-Tag: release-20171130_firefly~4^2~100^2~1^2~10^2~42
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bd2d6cb00d1aee5df63dc95aedaf1f2b2a7d9d4e;p=firefly-linux-kernel-4.4.55.git

xc2028: unlock on error in xc2028_set_config()

commit 210bd104c6acd31c3c6b8b075b3f12d4a9f6b60d upstream.

We have to unlock before returning -ENOMEM.

Fixes: 8dfbcc4351a0 ('[media] xc2028: avoid use after free')

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/media/tuners/tuner-xc2028.c b/drivers/media/tuners/tuner-xc2028.c
index 082ff5608455..317ef63ee789 100644
--- a/drivers/media/tuners/tuner-xc2028.c
+++ b/drivers/media/tuners/tuner-xc2028.c
@@ -1407,8 +1407,10 @@ static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
 	memcpy(&priv->ctrl, p, sizeof(priv->ctrl));
 	if (p->fname) {
 		priv->ctrl.fname = kstrdup(p->fname, GFP_KERNEL);
-		if (priv->ctrl.fname == NULL)
-			return -ENOMEM;
+		if (priv->ctrl.fname == NULL) {
+			rc = -ENOMEM;
+			goto unlock;
+		}
 	}
 
 	/*
@@ -1440,6 +1442,7 @@ static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
 		} else
 			priv->state = XC2028_WAITING_FIRMWARE;
 	}
+unlock:
 	mutex_unlock(&priv->lock);
 
 	return rc;