From patchwork Mon Dec 28 12:50:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 353208 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=ham 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 A6DECC433DB for ; Mon, 28 Dec 2020 15:54:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 775D420829 for ; Mon, 28 Dec 2020 15:54:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390677AbgL1PyA (ORCPT ); Mon, 28 Dec 2020 10:54:00 -0500 Received: from mail.kernel.org ([198.145.29.99]:37432 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390663AbgL1NhN (ORCPT ); Mon, 28 Dec 2020 08:37:13 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8509120719; Mon, 28 Dec 2020 13:36:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1609162593; bh=3zC6EWdok2I3DAvM5fV1Ahd3MB2We0PH0OBlRlqky0I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LjLjwj4Cv4Y+2F6o4iMT0hWJecs93BM5t6Z1BPAncLvRPIhm5c5LaWAnR3JgsRtyP 4fXLjmTBJFVgPiazClFFNc4vkBJ2w1e9VoGDQcr/UBID0g9oZ2BkCkLy6t1zwta7i8 D791zu6RX4oBfaQiEAjHzRORPsXQ5NsKYW1BErkM= 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 4.19 324/346] mtd: parser: cmdline: Fix parsing of part-names with colons Date: Mon, 28 Dec 2020 13:50:43 +0100 Message-Id: <20201228124935.445949358@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201228124919.745526410@linuxfoundation.org> References: <20201228124919.745526410@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@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 @@ -231,7 +231,7 @@ 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 @@ -241,6 +241,14 @@ 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; /* @@ -250,6 +258,10 @@ static int mtdpart_setup_real(char *s) */ p = strrchr(s, ':'); + /* Restore the '(' now. */ + if (open_parenth) + *open_parenth = '('; + /* Restore the ';' now. */ if (semicol) *semicol = ';';