Patch "ubi: Fix out of bounds write in volume update code" has been added to the 3.10-stable tree

Patch "ubi: Fix out of bounds write in volume update code" has been added to the 3.10-stable tree

[gregkh]

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

    ubi: Fix out of bounds write in volume update code

to the 3.10-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-out-of-bounds-write-in-volume-update-code.patch
and it can be found in the queue-3.10 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 e4f6daac20332448529b11f09388f1d55ef2084c Mon Sep 17 00:00:00 2001
From: Richard Weinberger <richard@nod.at>
Date: Sun, 21 Feb 2016 10:53:03 +0100
Subject: ubi: Fix out of bounds write in volume update code

From: Richard Weinberger <richard@nod.at>

commit e4f6daac20332448529b11f09388f1d55ef2084c upstream.

ubi_start_leb_change() allocates too few bytes.
ubi_more_leb_change_data() will write up to req->upd_bytes +
ubi->min_io_size bytes.

Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/drivers/mtd/ubi/upd.c
+++ b/drivers/mtd/ubi/upd.c
@@ -193,7 +193,7 @@ int ubi_start_leb_change(struct ubi_devi
 	vol->changing_leb = 1;
 	vol->ch_lnum = req->lnum;
 
-	vol->upd_buf = vmalloc(req->bytes);
+	vol->upd_buf = vmalloc(ALIGN((int)req->bytes, ubi->min_io_size));
 	if (!vol->upd_buf)
 		return -ENOMEM;
 


Patches currently in stable-queue which might be from richard@nod.at are

queue-3.10/ubi-fix-out-of-bounds-write-in-volume-update-code.patch