From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_RED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14B5BC433E6 for ; Mon, 28 Dec 2020 16:14:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDCDA221F0 for ; Mon, 28 Dec 2020 16:14:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2394274AbgL1QOe (ORCPT ); Mon, 28 Dec 2020 11:14:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:47218 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731795AbgL1NSm (ORCPT ); Mon, 28 Dec 2020 08:18:42 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5FB3420719; Mon, 28 Dec 2020 13:18:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609161482; bh=4FLg/tRKbiYKuEHf1ONFKkPAmAa3l7zTo+kJRelJwxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1l6ARmWd9zpjdSgMfQSQFKAlXVcrX+OhS6C14OqLwK8jz/0ZclhNENuk/Q5fCbqiA mZfa6uMnGMrRwx8v11nJ+csBkxO14Iamr6rWyvxNK2TiAaUBEZ31UqFTU5gmucrNpY dK1FWeQ48bcjdVDqarI89kDJlyJUT6aUIV9/XCz4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ron Minnich , Sven Eckelmann , Miquel Raynal Subject: [PATCH 4.14 227/242] mtd: parser: cmdline: Fix parsing of part-names with colons Date: Mon, 28 Dec 2020 13:50:32 +0100 Message-Id: <20201228124915.847375889@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228124904.654293249@linuxfoundation.org> References: <20201228124904.654293249@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sven Eckelmann commit 639a82434f16a6df0ce0e7c8595976f1293940fd upstream. Some devices (especially QCA ones) are already using hardcoded partition names with colons in it. The OpenMesh A62 for example provides following mtd relevant information via cmdline: root=31:11 mtdparts=spi0.0:256k(0:SBL1),128k(0:MIBIB),384k(0:QSEE),64k(0:CDT),64k(0:DDRPARAMS),64k(0:APPSBLENV),512k(0:APPSBL),64k(0:ART),64k(custom),64k(0:KEYS),0x002b0000(kernel),0x00c80000(rootfs),15552k(inactive) rootfsname=rootfs rootwait The change to split only on the last colon between mtd-id and partitions will cause newpart to see following string for the first partition: KEYS),0x002b0000(kernel),0x00c80000(rootfs),15552k(inactive) Such a partition list cannot be parsed and thus the device fails to boot. Avoid this behavior by making sure that the start of the first part-name ("(") will also be the last byte the mtd-id split algorithm is using for its colon search. Fixes: eb13fa022741 ("mtd: parser: cmdline: Support MTD names containing one or more colons") Cc: stable@vger.kernel.org Cc: Ron Minnich Signed-off-by: Sven Eckelmann Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20201124062506.185392-1-sven@narfation.org Signed-off-by: Greg Kroah-Hartman --- drivers/mtd/cmdlinepart.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) --- a/drivers/mtd/cmdlinepart.c +++ b/drivers/mtd/cmdlinepart.c @@ -228,7 +228,7 @@ static int mtdpart_setup_real(char *s) struct cmdline_mtd_partition *this_mtd; struct mtd_partition *parts; int mtd_id_len, num_parts; - char *p, *mtd_id, *semicol; + char *p, *mtd_id, *semicol, *open_parenth; /* * Replace the first ';' by a NULL char so strrchr can work @@ -238,6 +238,14 @@ static int mtdpart_setup_real(char *s) if (semicol) *semicol = '\0'; + /* + * make sure that part-names with ":" will not be handled as + * part of the mtd-id with an ":" + */ + open_parenth = strchr(s, '('); + if (open_parenth) + *open_parenth = '\0'; + mtd_id = s; /* @@ -247,6 +255,10 @@ static int mtdpart_setup_real(char *s) */ p = strrchr(s, ':'); + /* Restore the '(' now. */ + if (open_parenth) + *open_parenth = '('; + /* Restore the ';' now. */ if (semicol) *semicol = ';';