linux-kernel - [PATCH 4.4 185/312] pinctrl: bcm2835: Fix memory leak in error path

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Date:   Fri,  8 May 2020 14:32:56 +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, Stefan Wahren <stefan.wahren@...e.com>,
        Eric Anholt <eric@...olt.net>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 4.4 185/312] pinctrl: bcm2835: Fix memory leak in error path

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -795,7 +795,7 @@ static int bcm2835_pctl_dt_node_to_map(s
 	return 0;
 
 out:
-	kfree(maps);
+	bcm2835_pctl_dt_free_map(pctldev, maps, num_pins * maps_per_pin);
 	return err;
 }