[3.19.y-ckt stable] Patch "ubi: Fix out of bounds write in volume update code" has been added to the 3.19.y-ckt tree
Kamal Mostafa
kamal at canonical.com
Wed Mar 16 19:42:00 UTC 2016
This is a note to let you know that I have just added a patch titled
ubi: Fix out of bounds write in volume update code
to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue
This patch is scheduled to be released in version 3.19.8-ckt17.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
---8<------------------------------------------------------------
>From 1e737dac946880b5e7436bf8f9ea2fb27dca8b24 Mon Sep 17 00:00:00 2001
From: Richard Weinberger <richard at nod.at>
Date: Sun, 21 Feb 2016 10:53:03 +0100
Subject: ubi: Fix out of bounds write in volume update code
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 at nod.at>
Reviewed-by: Boris Brezillon <boris.brezillon at free-electrons.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
drivers/mtd/ubi/upd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/ubi/upd.c b/drivers/mtd/ubi/upd.c
index 2a1b6e0..0134ba3 100644
--- a/drivers/mtd/ubi/upd.c
+++ b/drivers/mtd/ubi/upd.c
@@ -193,7 +193,7 @@ int ubi_start_leb_change(struct ubi_device *ubi, struct ubi_volume *vol,
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;
--
2.7.0
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