From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Boris Brezillon" , "Richard Weinberger" Date: Tue, 29 Mar 2016 20:18:22 +0100 Message-ID: Subject: [PATCH 3.2 57/62] ubi: Fix out of bounds write in volume update code In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2.79-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Richard Weinberger 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 Reviewed-by: Boris Brezillon Signed-off-by: Ben Hutchings --- 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 @@ -197,7 +197,7 @@ int ubi_start_leb_change(struct ubi_devi vol->ch_lnum = req->lnum; vol->ch_dtype = req->dtype; - vol->upd_buf = vmalloc(req->bytes); + vol->upd_buf = vmalloc(ALIGN((int)req->bytes, ubi->min_io_size)); if (!vol->upd_buf) return -ENOMEM;