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 0D8734908C0; Sat, 12 Sep 2026 18:21:48 +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=1789237309; cv=none; b=czPNquT6zylhEkR7dKnRPVQdoIabdhoOctAaUI3J1dnj9WwidH7g0h/1jIpw6MFLj34iCEbW7MXD3MF2eF3w7oqkdn1UdP3WckXlCPdY1aX+QCRBizr1t2u2s/5iQU5z6igk216RLBiSMYObSvktK0+XrPJR1XWR2NB1Ip2YIm8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789237309; c=relaxed/simple; bh=mOrYvQrvmklnFZXukwnp0GWoaCTyez9Owou/GBPDQeQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U7UH534j7QHIt3kwjP377vbjsv0qF5GJ+jAHKQdvZUzZouoI4OQRNnRpQpWeZstZzOcqWVrI+NuKGT84neMmLhGGY12RkCKHzxCAo9yc71jFkkodKWxLRvfofVWKYvKzsYb0YByEGf/RLvkjartesnGIAhf78JWgcsHT1vkXUtc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=N4/+RL37; 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="N4/+RL37" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09BDF1F000FF; Sat, 12 Sep 2026 18:21:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789237307; bh=QsSFnkjliwF6jH2ydbg5uGgYyoRT5Eo5PM4hogr2XnM=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=N4/+RL37zgvKuWGKkJHqV6IiKw9Ri9noO+s7s5/m2y0wIQJojZ84dsAKtHbsowf9M xrhlRbFu0v/T0WhLJNkwSx7293xJNqiwO0WjP8hs22AOJsFVbA2Wo6j2ULnSpfHv2+ 71UxCv4LwBgPZni+ibOqyvUHQXg7aEXvrVh8NcrA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhan Xusheng , Jan Kara Subject: [PATCH 5.15 215/935] udf: Fix i_lenExtents truncation on 32-bit kernels Date: Sat, 12 Sep 2026 08:54:05 +0200 Message-ID: <20260912065531.756444212@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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 5.15-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 @@ -420,7 +420,7 @@ 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); } /* Can we merge with the previous extent? */