From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Lee Jones <lee@kernel.org>,
Daniel Thompson <daniel.thompson@linaro.org>,
Jingoo Han <jingoohan1@gmail.com>, Helge Deller <deller@gmx.de>,
Dan Carpenter <dan.carpenter@linaro.org>
Subject: [PATCH v1 1/1] backlight: hx8357: Fix potential NULL pointer dereference
Date: Sun, 14 Jan 2024 16:39:21 +0200 [thread overview]
Message-ID: <20240114143921.550736-1-andriy.shevchenko@linux.intel.com> (raw)
The "im" pins are optional. Add missing check in the hx8357_probe().
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/642e1230-3358-4006-a17f-3f297897ae74@moroto.mountain
Fixes: 7d84a63a39b7 ("backlight: hx8357: Convert to agnostic GPIO API")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/video/backlight/hx8357.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
index d7298376cf74..bf18337ff0c2 100644
--- a/drivers/video/backlight/hx8357.c
+++ b/drivers/video/backlight/hx8357.c
@@ -609,11 +609,13 @@ static int hx8357_probe(struct spi_device *spi)
lcd->im_pins = devm_gpiod_get_array_optional(dev, "im", GPIOD_OUT_LOW);
if (IS_ERR(lcd->im_pins))
return dev_err_probe(dev, PTR_ERR(lcd->im_pins), "failed to request im GPIOs\n");
- if (lcd->im_pins->ndescs < HX8357_NUM_IM_PINS)
- return dev_err_probe(dev, -EINVAL, "not enough im GPIOs\n");
+ if (lcd->im_pins) {
+ if (lcd->im_pins->ndescs < HX8357_NUM_IM_PINS)
+ return dev_err_probe(dev, -EINVAL, "not enough im GPIOs\n");
- for (i = 0; i < HX8357_NUM_IM_PINS; i++)
- gpiod_set_consumer_name(lcd->im_pins->desc[i], "im_pins");
+ for (i = 0; i < HX8357_NUM_IM_PINS; i++)
+ gpiod_set_consumer_name(lcd->im_pins->desc[i], "im_pins");
+ }
lcdev = devm_lcd_device_register(&spi->dev, "mxsfb", &spi->dev, lcd,
&hx8357_ops);
--
2.43.0.rc1.1.gbec44491f096
WARNING: multiple messages have this Message-ID (diff)
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Jingoo Han <jingoohan1@gmail.com>,
Daniel Thompson <daniel.thompson@linaro.org>,
Lee Jones <lee@kernel.org>, Helge Deller <deller@gmx.de>,
Dan Carpenter <dan.carpenter@linaro.org>
Subject: [PATCH v1 1/1] backlight: hx8357: Fix potential NULL pointer dereference
Date: Sun, 14 Jan 2024 16:39:21 +0200 [thread overview]
Message-ID: <20240114143921.550736-1-andriy.shevchenko@linux.intel.com> (raw)
The "im" pins are optional. Add missing check in the hx8357_probe().
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/642e1230-3358-4006-a17f-3f297897ae74@moroto.mountain
Fixes: 7d84a63a39b7 ("backlight: hx8357: Convert to agnostic GPIO API")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/video/backlight/hx8357.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/video/backlight/hx8357.c b/drivers/video/backlight/hx8357.c
index d7298376cf74..bf18337ff0c2 100644
--- a/drivers/video/backlight/hx8357.c
+++ b/drivers/video/backlight/hx8357.c
@@ -609,11 +609,13 @@ static int hx8357_probe(struct spi_device *spi)
lcd->im_pins = devm_gpiod_get_array_optional(dev, "im", GPIOD_OUT_LOW);
if (IS_ERR(lcd->im_pins))
return dev_err_probe(dev, PTR_ERR(lcd->im_pins), "failed to request im GPIOs\n");
- if (lcd->im_pins->ndescs < HX8357_NUM_IM_PINS)
- return dev_err_probe(dev, -EINVAL, "not enough im GPIOs\n");
+ if (lcd->im_pins) {
+ if (lcd->im_pins->ndescs < HX8357_NUM_IM_PINS)
+ return dev_err_probe(dev, -EINVAL, "not enough im GPIOs\n");
- for (i = 0; i < HX8357_NUM_IM_PINS; i++)
- gpiod_set_consumer_name(lcd->im_pins->desc[i], "im_pins");
+ for (i = 0; i < HX8357_NUM_IM_PINS; i++)
+ gpiod_set_consumer_name(lcd->im_pins->desc[i], "im_pins");
+ }
lcdev = devm_lcd_device_register(&spi->dev, "mxsfb", &spi->dev, lcd,
&hx8357_ops);
--
2.43.0.rc1.1.gbec44491f096
next reply other threads:[~2024-01-14 14:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-14 14:39 Andy Shevchenko [this message]
2024-01-14 14:39 ` [PATCH v1 1/1] backlight: hx8357: Fix potential NULL pointer dereference Andy Shevchenko
2024-01-15 17:21 ` Daniel Thompson
2024-01-15 17:21 ` Daniel Thompson
2024-01-25 13:23 ` (subset) " Lee Jones
2024-01-25 13:23 ` Lee Jones
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