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Message-Id: <20160307234604.474911233@linuxfoundation.org>
Date: Mon, 7 Mar 2016 15:46:11 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Richard Weinberger <richard@....at>,
Boris Brezillon <boris.brezillon@...e-electrons.com>
Subject: [PATCH 3.14 28/36] ubi: Fix out of bounds write in volume update code
3.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Richard Weinberger <richard@....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@....at>
Reviewed-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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;
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