From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 23262378838; Fri, 4 Sep 2026 06:03:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788501836; cv=none; b=scR9L1wQ5TSQnLR9dl1AK0ww7bZWA+HhLn823t6AH7o6P9ZMA6QpwfshEHvFgtU9lsG+gERLCkV+Kz+AVzwBsgHMuu3ecuP0gr6ctBZBQiDGWvQ/s71Cj+KzjEx/4VHjWWzgO6fvOSLZu3e4zb3/MEMIu52N4lZC5oBsDxOK+04= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788501836; c=relaxed/simple; bh=mA/HFg2L+osLKcBeDO3xoJrRJyOVNSzZnfLDvmxOD6c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EPbiLRWoyut9t8HfgBrFlDKY9uAd7ulL/gJoyToPPfq5jeiNOp7X+CqEe3K2DYQVv90CMJH5YCT93XhcAhYvN8gamB1Q84nMj2XWZFtz4L0Xr1XQCu8tpSuyWpWyHUhIeWMBc+tfx0Od+yiC1lQiSJOODAwBqt2MRIkmeg1LC/w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=YhQ9BgLv; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="YhQ9BgLv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 36B2E1F00A3D; Fri, 4 Sep 2026 06:03:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788501834; bh=e2ci8G6aljnLUCqaLbli/SxEJOht7p72ZyY4+AIRI2w=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=YhQ9BgLviRL1Efv19QKdyoErO5ZNQjRVGHgttGr1GfPq5WErxwvt/0+FPbjAlJfH/ nfo+2n+XL48NLrKQCPY/hHwgjOzwxDaRsc6lFzSxF05m08L3dDA5NE1nHleBoPs/A7 GzHfHARg3hYsvs4lfrM2dD2p6XheF9WC53yCJyBU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhan Xusheng , Jan Kara Subject: [PATCH 6.18 550/552] udf: Fix i_lenExtents truncation on 32-bit kernels Date: Fri, 4 Sep 2026 07:01:47 +0200 Message-ID: <20260904045803.066315416@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045747.813364717@linuxfoundation.org> References: <20260904045747.813364717@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhan Xusheng commit a5a5ed23b1340ff0f32a14a7ca8585f7c4e9b2e2 upstream. In udf_do_extend_file() the total extent length is rounded up to a block boundary with: iinfo->i_lenExtents = (iinfo->i_lenExtents + sb->s_blocksize - 1) & ~(sb->s_blocksize - 1); i_lenExtents is a __u64, but sb->s_blocksize is unsigned long. On 32-bit kernels unsigned long is 32-bit, so ~(sb->s_blocksize - 1) is a 32-bit value (e.g. 0xfffff800 for a 2 KiB block) that is zero-extended in the AND, clearing the upper 32 bits of i_lenExtents. For UDF files whose total extent length exceeds 4 GiB this truncates i_lenExtents when the file is extended, corrupting the tracked extent length. Cast the block size to 64-bit before forming the mask. 64-bit kernels are unaffected. Fixes: 48d6d8ff7dca ("udf: cache struct udf_inode_info") Cc: stable@vger.kernel.org Signed-off-by: Zhan Xusheng Link: https://patch.msgid.link/20260722082425.213311-1-zhanxusheng@xiaomi.com Signed-off-by: Jan Kara Signed-off-by: Greg Kroah-Hartman --- fs/udf/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -532,7 +532,7 @@ static int udf_do_extend_file(struct ino sb->s_blocksize - 1) & ~(sb->s_blocksize - 1)); iinfo->i_lenExtents = (iinfo->i_lenExtents + sb->s_blocksize - 1) & - ~(sb->s_blocksize - 1); + ~((u64)sb->s_blocksize - 1); } add = 0;