From patchwork Fri May 1 13:22:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 226496 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 2072FC4724C for ; Fri, 1 May 2020 13:58:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 009442054F for ; Fri, 1 May 2020 13:58:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588341501; bh=l6I8N9mAySJ1NIPQgd/YPEign4VOEC6ZJUPecdttEXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Z638SwjreJMtFGp+g31zgRG37NFi024QKBoxtrKOtH1f6pZNFIH7+Oxy/lvjrd/1o 4xAWuCYqeCKUoNqcTDf/OZQkC2n5trmRs/Ginc/q3ExpWpN8pLOCPiR/Lrj9+wTcv4 y4qWHwS/WrWEOo3VNvdUSR7eC4z871beedy2VKak= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729981AbgEANaj (ORCPT ); Fri, 1 May 2020 09:30:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:54686 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729965AbgEANaf (ORCPT ); Fri, 1 May 2020 09:30:35 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 703A420757; Fri, 1 May 2020 13:30:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588339834; bh=l6I8N9mAySJ1NIPQgd/YPEign4VOEC6ZJUPecdttEXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b4rx1E5BVHRec+6b3urh6DIfvD9PP8zNgg4mGYtpaZM4n6gEG6wIju/WJUgzDX/Ry kNv0JsIaypZILrEPZF1IHfkF4qMFqs/0uXAfXN+XjL3VEHhV0SpHPG31CPNxu8DerK 67ksef7Dsf8z2GFPeULN/F6/xFGEL1jMImAykZEU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Colin Ian King , Theodore Tso , Ashwin H Subject: [PATCH 4.9 79/80] ext4: unsigned int compared against zero Date: Fri, 1 May 2020 15:22:13 +0200 Message-Id: <20200501131537.893149960@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200501131513.810761598@linuxfoundation.org> References: <20200501131513.810761598@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Colin Ian King commit fbbbbd2f28aec991f3fbc248df211550fbdfd58c upstream. There are two cases where u32 variables n and err are being checked for less than zero error values, the checks is always false because the variables are not signed. Fix this by making the variables ints. Addresses-Coverity: ("Unsigned compared against 0") Fixes: 345c0dbf3a30 ("ext4: protect journal inode's blocks using block_validity") Signed-off-by: Colin Ian King Signed-off-by: Theodore Ts'o Signed-off-by: Ashwin H Signed-off-by: Greg Kroah-Hartman --- fs/ext4/block_validity.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/ext4/block_validity.c +++ b/fs/ext4/block_validity.c @@ -141,7 +141,8 @@ static int ext4_protect_reserved_inode(s struct inode *inode; struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_map_blocks map; - u32 i = 0, err = 0, num, n; + u32 i = 0, num; + int err = 0, n; if ((ino < EXT4_ROOT_INO) || (ino > le32_to_cpu(sbi->s_es->s_inodes_count)))