linux-kernel - [PATCH 3.16.y-ckt 151/180] pinctrl: bcm2835: Fix memory leak in error path

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Message-Id: <1454538786-12215-152-git-send-email-luis.henriques@canonical.com>
Date:	Wed,  3 Feb 2016 22:32:37 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Stefan Wahren <stefan.wahren@...e.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.16.y-ckt 151/180] pinctrl: bcm2835: Fix memory leak in error path

3.16.7-ckt24 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Stefan Wahren <stefan.wahren@...e.com>

commit 53653c6b91750debba6dc4503003c851257fd340 upstream.

In case of an invalid pin value bcm2835_pctl_dt_node_to_map()
would leak the pull configs of already assigned pins.
So avoid this by calling the free map function in error case.

Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
Fixes: e1b2dc70cd5b ("pinctrl: add bcm2835 driver")
Reviewed-by: Eric Anholt <eric@...olt.net>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
[ luis: backported to 3.16:
  - file rename: drivers/pinctrl/bcm/pinctrl-bcm2835.c ->
    drivers/pinctrl/pinctrl-bcm2835.c ]
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/pinctrl/pinctrl-bcm2835.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-bcm2835.c b/drivers/pinctrl/pinctrl-bcm2835.c
index 1ad7caf08b6c..294c8a9dfe50 100644
--- a/drivers/pinctrl/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/pinctrl-bcm2835.c
@@ -795,7 +795,7 @@ static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
 	return 0;
 
 out:
-	kfree(maps);
+	bcm2835_pctl_dt_free_map(pctldev, maps, num_pins * maps_per_pin);
 	return err;
 }