Patch "cxl: Fix error path on bad ioctl" has been added to the 4.9-stable tree

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

cxl: Fix error path on bad ioctl

to the 4.9-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:
cxl-fix-error-path-on-bad-ioctl.patch
and it can be found in the queue-4.9 subdirectory.

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

From: Frederic Barrat <[email protected]>
Date: Tue, 6 Jun 2017 11:43:41 +0200
Subject: cxl: Fix error path on bad ioctl

From: Frederic Barrat <[email protected]>

commit cec422c11caeeccae709e9942058b6b644ce434c upstream.

Fix error path if we can't copy user structure on CXL_IOCTL_START_WORK ioctl. We shouldn't unlock the context status mutex as it was not locked (yet).

---
 drivers/misc/cxl/file.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

@@ -155,11 +155,8 @@ static long afu_ioctl_start_work(struct
 
 	/* Do this outside the status_mutex to avoid a circular dependency with
 	 * the locking in cxl_mmap_fault() */
-	if (copy_from_user(&work, uwork,
-			   sizeof(struct cxl_ioctl_start_work))) {
-		rc = -EFAULT;
-		goto out;
-	}
+	if (copy_from_user(&work, uwork, sizeof(work)))
+		return -EFAULT;
 
 	mutex_lock(&ctx->status_mutex);
 	if (ctx->status != OPENED) {

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

queue-4.9/cxl-fix-error-path-on-bad-ioctl.patch queue-4.9/cxl-avoid-double-free_irq-for-psl-slice-interrupts.patch