linux-kernel - [PATCH v2 1/2] gpio: mpsse: Check for error code from devm_mutex

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241030174132.2113286-2-andriy.shevchenko@linux.intel.com>
Date: Wed, 30 Oct 2024 19:36:51 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Mary Strodl <mstrodl@....rit.edu>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH v2 1/2] gpio: mpsse: Check for error code from devm_mutex_init() call

Even if it's not critical, the avoidance of checking the error code
from devm_mutex_init() call today diminishes the point of using devm
variant of it. Tomorrow it may even leak something. Add the missed
check.

Fixes: c46a74ff05c0 ("gpio: add support for FTDI's MPSSE as GPIO")
Reviewed-by: Mary Strodl <mstrodl@....rit.edu>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpio-mpsse.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-mpsse.c b/drivers/gpio/gpio-mpsse.c
index 3ab6651d2226..9ef24449126a 100644
--- a/drivers/gpio/gpio-mpsse.c
+++ b/drivers/gpio/gpio-mpsse.c
@@ -430,8 +430,13 @@ static int gpio_mpsse_probe(struct usb_interface *interface,
 	if (err)
 		return err;
 
-	devm_mutex_init(dev, &priv->io_mutex);
-	devm_mutex_init(dev, &priv->irq_mutex);
+	err = devm_mutex_init(dev, &priv->io_mutex);
+	if (err)
+		return err;
+
+	err = devm_mutex_init(dev, &priv->irq_mutex);
+	if (err)
+		return err;
 
 	priv->gpio.label = devm_kasprintf(dev, GFP_KERNEL,
 					  "gpio-mpsse.%d.%d",
-- 
2.43.0.rc1.1336.g36b5255a03ac