Patch "UBI: fix check for "too many bytes"" has been added to the 4.0-stable tree

Patch "UBI: fix check for "too many bytes"" has been added to the 4.0-stable tree

[gregkh]

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

    UBI: fix check for "too many bytes"

to the 4.0-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:
     ubi-fix-check-for-too-many-bytes.patch
and it can be found in the queue-4.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 299d0c5b27346a77a0777c993372bf8777d4f2e5 Mon Sep 17 00:00:00 2001
From: Brian Norris <computersforpeace@gmail.com>
Date: Sat, 28 Feb 2015 02:23:28 -0800
Subject: UBI: fix check for "too many bytes"

From: Brian Norris <computersforpeace@gmail.com>

commit 299d0c5b27346a77a0777c993372bf8777d4f2e5 upstream.

The comparison from the previous line seems to have been erroneously
(partially) copied-and-pasted onto the next. The second line should be
checking req.bytes, not req.lnum.

Coverity CID #139400

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
[rw: Fixed comparison]
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mtd/ubi/cdev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -455,7 +455,7 @@ static long vol_cdev_ioctl(struct file *
 		/* Validate the request */
 		err = -EINVAL;
 		if (req.lnum < 0 || req.lnum >= vol->reserved_pebs ||
-		    req.bytes < 0 || req.lnum >= vol->usable_leb_size)
+		    req.bytes < 0 || req.bytes > vol->usable_leb_size)
 			break;
 
 		err = get_exclusive(desc);


Patches currently in stable-queue which might be from computersforpeace@gmail.com are

queue-4.0/ubi-initialize-leb-number-variable.patch
queue-4.0/ubi-fix-out-of-bounds-write.patch
queue-4.0/ubi-account-for-bitflips-in-both-the-vid-header-and-data.patch
queue-4.0/ubi-fix-check-for-too-many-bytes.patch