patch "coresight: checking for NULL string in coresight_name_match()" added to char-misc-testing

This is a note to let you know that I've just added the patch titled

coresight: checking for NULL string in coresight_name_match()

to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the char-misc-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From: Mathieu Poirier <[email protected]>
Date: Thu, 17 Dec 2015 08:47:02 -0700
Subject: coresight: checking for NULL string in coresight_name_match()

Connection child names associated to ports can sometimes be NULL, which is the case when booting a system on QEMU or when the Coresight power domain isn't switched on.

This patch is adding a check to make sure a NULL string isn't fed to strcmp(), something that avoid crashing the system.

---
 drivers/hwtracing/coresight/coresight.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index e25492137d8b..93738dfbf631 100644
@@ -548,7 +548,7 @@ static int coresight_name_match(struct device *dev, void *data)
 	to_match = data;
 	i_csdev = to_coresight_device(dev);
 
-	if (!strcmp(to_match, dev_name(&i_csdev->dev)))
+	if (to_match && !strcmp(to_match, dev_name(&i_csdev->dev)))
 		return 1;
 
 	return 0;

2.6.4