Patch "hwrng: core - correct error check of kthread_run call" has been added to the 4.1-stable tree

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

hwrng: core - correct error check of kthread_run call

to the 4.1-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:
hwrng-core-correct-error-check-of-kthread_run-call.patch
and it can be found in the queue-4.1 subdirectory.

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

From: Martin Schwidefsky <[email protected]>
Date: Fri, 24 Jul 2015 13:13:30 +0200
Subject: hwrng: core - correct error check of kthread_run call

From: Martin Schwidefsky <[email protected]>

commit 17fb874dee093139923af8ed36061faa92cc8e79 upstream.

The kthread_run() function can return two different error values but the hwrng core only checks for -ENOMEM. If the other error value -EINTR is returned it is assigned to hwrng_fill and later used on a kthread_stop() call which naturally crashes.

---
 drivers/char/hw_random/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -429,7 +429,7 @@ static int hwrng_fillfn(void *unused)
 static void start_khwrngd(void)
 {
 	hwrng_fill = kthread_run(hwrng_fillfn, NULL, "hwrng");
-	if (hwrng_fill == ERR_PTR(-ENOMEM)) {
+	if (IS_ERR(hwrng_fill)) {
 		pr_err("hwrng_fill thread creation failed");
 		hwrng_fill = NULL;
 	}

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

queue-4.1/hwrng-core-correct-error-check-of-kthread_run-call.patch