Patch "of/device: Prevent buffer overflow in of_device_modalias()" has been added to the 4.13-stable tree

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

of/device: Prevent buffer overflow in of_device_modalias()

to the 4.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
of-device-prevent-buffer-overflow-in-of_device_modalias.patch
and it can be found in the queue-4.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Bjorn Andersson <[email protected]>
Date: Wed, 23 Aug 2017 18:04:04 -0700
Subject: of/device: Prevent buffer overflow in of_device_modalias()

From: Bjorn Andersson <[email protected]>

commit 08ab58d9de3eb8498ae0585001d0975e46217a39 upstream.

As of_device_get_modalias() returns the number of bytes that would have been written to the target string, regardless of how much did fit in the buffer, it's possible that the returned index points beyond the buffer passed to of_device_modalias() - causing memory beyond the buffer to be null terminated.

---
 drivers/of/device.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -274,6 +274,8 @@ ssize_t of_device_modalias(struct device
 	ssize_t sl = of_device_get_modalias(dev, str, len - 2);
 	if (sl < 0)
 		return sl;
+	if (sl > len - 2)
+		return -ENOMEM;
 
 	str[sl++] = '\n';
 	str[sl] = 0;

Patches currently in stable-queue which might be from [email protected] are

queue-4.13/of-device-prevent-buffer-overflow-in-of_device_modalias.patch