This is a note to let you know that I've just added the patch titled
mtd: nand: atmel: fix buffer overflow in atmel_pmecc_user
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:
mtd-nand-atmel-fix-buffer-overflow-in-atmel_pmecc_user.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 <stable@xxxxxxxxxxxxxxx> know about it.
>From 36de80740008e6a4a55115b4a92e2059e47c1cba Mon Sep 17 00:00:00 2001
From: Richard Genoud <richard.genoud@xxxxxxxxx>
Date: Wed, 27 Sep 2017 14:49:17 +0200
Subject: mtd: nand: atmel: fix buffer overflow in atmel_pmecc_user
From: Richard Genoud <richard.genoud@xxxxxxxxx>
commit 36de80740008e6a4a55115b4a92e2059e47c1cba upstream.
When calculating the size needed by struct atmel_pmecc_user *user,
the dmu and delta buffer sizes were forgotten.
This lead to a memory corruption (especially with a large ecc_strength).
Link: http://lkml.kernel.org/r/1506503157.3016.5.camel@xxxxxxxxx
Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
Reported-by: Richard Genoud <richard.genoud@xxxxxxxxx>
Pointed-at-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Richard Genoud <richard.genoud@xxxxxxxxx>
Reviewed-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/nand/atmel/pmecc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mtd/nand/atmel/pmecc.c
+++ b/drivers/mtd/nand/atmel/pmecc.c
@@ -363,7 +363,7 @@ atmel_pmecc_create_user(struct atmel_pme
size += (req->ecc.strength + 1) * sizeof(u16);
/* Reserve space for mu, dmu and delta. */
size = ALIGN(size, sizeof(s32));
- size += (req->ecc.strength + 1) * sizeof(s32);
+ size += (req->ecc.strength + 1) * sizeof(s32) * 3;
user = kzalloc(size, GFP_KERNEL);
if (!user)
Patches currently in stable-queue which might be from richard.genoud@xxxxxxxxx are
queue-4.13/mtd-nand-atmel-fix-buffer-overflow-in-atmel_pmecc_user.patch