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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 794A8C4332F for ; Sat, 24 Dec 2022 01:39:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236987AbiLXBj3 (ORCPT ); Fri, 23 Dec 2022 20:39:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236848AbiLXBij (ORCPT ); Fri, 23 Dec 2022 20:38:39 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4659E537E7; Fri, 23 Dec 2022 17:32:50 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id E523CCE1D02; Sat, 24 Dec 2022 01:32:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78193C433D2; Sat, 24 Dec 2022 01:32:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1671845551; bh=CuK5PUG57Iq76Bn6VOr/oG2+8tyxt7rEJGgFkOme8dQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WMNR53kKQaY9DSgBYoIPpgr6hX/6h8Rjn9jT/voTkWLQjlSBA2U/y/wMYw62L6NzM pCXOSr9B8perqN0XO72MVvrZMRR0DkizaO8ZFJaoXrLPPlI66kBeR30GJoJO1Id2oa LWMEqOg8cjV+FTdPljL8UGf0fAPEkrwth2EwN4T3FUc9++QNvseA/kzkLzERk6WDMH ywXJ215ROWzEQV1vvLY8OHlhDFav0lY2ssLH7seMLWJq/jNknVAwf/ArLweJ9/tway t7ZCNcntEx8+BM+hl6cPNgTFdL473r4YohOS+UDwq8f6l6QGvOai6TB065NQetq/B0 x2oEECkKAMsrA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yuezhang Mo , Sungjong Seo , Namjae Jeon , Sasha Levin , linux-fsdevel@vger.kernel.org Subject: [PATCH AUTOSEL 5.10 10/11] exfat: fix overflow in sector and cluster conversion Date: Fri, 23 Dec 2022 20:32:00 -0500 Message-Id: <20221224013202.393372-10-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221224013202.393372-1-sashal@kernel.org> References: <20221224013202.393372-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yuezhang Mo [ Upstream commit 40306b4d1ba25970dafd53432e8daa5d591ebd99 ] According to the exFAT specification, there are at most 2^32-11 clusters in a volume. so using 'int' is not enough for cluster index, the return value type of exfat_sector_to_cluster() should be 'unsigned int'. Signed-off-by: Yuezhang Mo Reviewed-by: Sungjong Seo Signed-off-by: Namjae Jeon Signed-off-by: Sasha Levin --- fs/exfat/exfat_fs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h index 0d139c7d150d..5c5ddd4e3a2f 100644 --- a/fs/exfat/exfat_fs.h +++ b/fs/exfat/exfat_fs.h @@ -373,7 +373,7 @@ static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi, sbi->data_start_sector; } -static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi, +static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi, sector_t sec) { return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) + -- 2.35.1