From: Richard Weinberger <richard@nod.at>
To: linux-mtd@lists.infradead.org
Cc: dedekind1@gmail.com, richard@nod.at,
linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: [PATCH] ubi: Fix out of bounds write in volume update code
Date: Sun, 21 Feb 2016 10:53:03 +0100 [thread overview]
Message-ID: <1456048383-27344-1-git-send-email-richard@nod.at> (raw)
ubi_start_leb_change() alloctes too few bytes.
ubi_more_leb_change_data() will write up to req->upd_bytes +
ubi->min_io_size bytes.
Cc: stable@vger.kernel.org
Signed-off-by: Richard Weinberger <richard@nod.at>
---
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 cfeaf0f..b7901ce 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;
--
1.8.4.5
next reply other threads:[~2016-02-21 9:53 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-21 9:53 Richard Weinberger [this message]
2016-02-24 14:03 ` [PATCH] ubi: Fix out of bounds write in volume update code Boris Brezillon
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