From: Michael Straube <straube.linux@gmail.com>
To: gregkh@linuxfoundation.org
Cc: linux@wolf-entwicklungen.de, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org,
Michael Straube <straube.linux@gmail.com>
Subject: [PATCH] staging: pi433: fix potential null dereference
Date: Sun, 25 Nov 2018 10:22:25 +0100 [thread overview]
Message-ID: <20181125092225.10188-1-straube.linux@gmail.com> (raw)
Add a test for successful call to cdev_alloc() to avoid
potential null dereference. Issue reported by smatch.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
---
drivers/staging/pi433/pi433_if.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index 786478671190..d72de2105053 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -1245,6 +1245,10 @@ static int pi433_probe(struct spi_device *spi)
/* create cdev */
device->cdev = cdev_alloc();
+ if (!device->cdev) {
+ dev_dbg(device->dev, "allocation of cdev failed");
+ goto cdev_failed;
+ }
device->cdev->owner = THIS_MODULE;
cdev_init(device->cdev, &pi433_fops);
retval = cdev_add(device->cdev, device->devt, 1);
--
2.19.2
next reply other threads:[~2018-11-25 9:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-25 9:22 Michael Straube [this message]
2018-11-26 9:47 ` [PATCH] staging: pi433: fix potential null dereference Dan Carpenter
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