From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751125AbcFNIMb (ORCPT ); Tue, 14 Jun 2016 04:12:31 -0400 Received: from mail.sigma-star.at ([95.130.255.111]:45999 "EHLO mail.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750751AbcFNIM1 (ORCPT ); Tue, 14 Jun 2016 04:12:27 -0400 From: Richard Weinberger To: linux-mtd@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Richard Weinberger Subject: [PATCH 5/7] ubi: Check whether the Fastmap anchor matches the super block Date: Tue, 14 Jun 2016 10:12:16 +0200 Message-Id: <1465891938-4063-5-git-send-email-richard@nod.at> X-Mailer: git-send-email 2.7.3 In-Reply-To: <1465891938-4063-1-git-send-email-richard@nod.at> References: <1465891938-4063-1-git-send-email-richard@nod.at> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This helps to detect cases where an user copies an UBI image to another target with different bad blocks. Signed-off-by: Richard Weinberger --- drivers/mtd/ubi/fastmap.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c index 12bdb09..b66cb3e 100644 --- a/drivers/mtd/ubi/fastmap.c +++ b/drivers/mtd/ubi/fastmap.c @@ -975,6 +975,13 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai, goto free_hdr; } + if (i == 0 && pnum != fm_anchor) { + ubi_err(ubi, "Fastmap anchor PEB mismatch: PEB: %i vs. %i", + pnum, fm_anchor); + ret = UBI_BAD_FASTMAP; + goto free_hdr; + } + ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0); if (ret && ret != UBI_IO_BITFLIPS) { ubi_err(ubi, "unable to read fastmap block# %i EC (PEB: %i)", -- 2.7.3