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 53EE737C10D for ; Thu, 16 Jul 2026 16:28:17 +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=1784219298; cv=none; b=KLHdMeg4fRCur5X9yIvRzGZnWIOvSEsQzc12PEAEg/tHhfM63A+z4V+hItEc9eghIKEHDnzRVid9M9efe7y8/0pXYeJVmqBBup15jCEInpM8HEpmvnyr8DaXOM/0VNxv63k2K9x5Oqa0/f1GKLitaXYb2Y/z6UQK1C1Yj0/aFPU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784219298; c=relaxed/simple; bh=3A0ys5txRIGGEbNLtfXd7cTMliL3qLMjjGwGc7gE85I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uYdKkFyy/wWy3/vfK6rKl+gRY1ZP92Sw1ixt+mkAC90HVxMF1zXfaGkIhA1wuC/R+zIACtkDvH3NYGng9MtkFdVlDHyEwoF9u6xD1qh3R4510sOdsUqvXqImHm9y5klePUwUNM8HiyywA2ePQD3wjJNT1o7uQzfj+WL3Czhf/WM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eZ8PADVw; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eZ8PADVw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 828641F00A3A; Thu, 16 Jul 2026 16:28:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784219297; bh=834jB4XVlpjW74BR6/SvqR/KoXwCV00e2zUXwVawwC8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=eZ8PADVw9FMEJGfBNnaVKdQWuECACKCJzD2O+VLyKls319q5vv/RDsK3hQNGJAKwl U37FS4GUYdWAM2qSd7RRGdML78/kNSlsRl5ib2jV94RTaBqSv4sCwqolHysJoWufzL UgpFQx/9GvrcUep0mJv4mtL7ixwvnWW9aDMlcuPWjM0E8HknjyrOFIHou2xDzCoTag /QKtRepHTijS6U5uinP3jisdFQePYVFBdaG7EHEYtnrguJL4g/dMuo8/aEJa/JiWUZ QHbl9RV4F2WHj0t/8tmuEYhlznQarUNx+bvM0DR5/NT9M098NXMmZNg9d2BEu//fzt CiUtD6phiri8w== From: Sasha Levin To: stable@vger.kernel.org Cc: Zihan Xi , Ren Wei , Steve French , Sasha Levin Subject: [PATCH 5.10.y] smb: client: use unaligned reads in parse_posix_ctxt() Date: Thu, 16 Jul 2026 12:28:10 -0400 Message-ID: <20260716162810.635369-1-sashal@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <2026071412-earring-oozy-27d4@gregkh> References: <2026071412-earring-oozy-27d4@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Zihan Xi [ Upstream commit b86467cd2691192ad4809a5a6e922fc24b8e9839 ] The server controls create-context DataOffset, so the POSIX context data pointer may be misaligned on strict-alignment architectures. Use get_unaligned_le32() when reading nlink, reparse_tag, and mode. Fixes: 69dda3059e7a ("cifs: add SMB2_open() arg to return POSIX data") Cc: stable@vger.kernel.org Signed-off-by: Zihan Xi Signed-off-by: Ren Wei Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/cifs/smb2pdu.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 4197096e7fdbcc..da65e36794ee84 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1975,9 +1975,9 @@ parse_posix_ctxt(struct create_context *cc, struct smb2_file_all_info *info, memset(posix, 0, sizeof(*posix)); - posix->nlink = le32_to_cpu(*(__le32 *)(beg + 0)); - posix->reparse_tag = le32_to_cpu(*(__le32 *)(beg + 4)); - posix->mode = le32_to_cpu(*(__le32 *)(beg + 8)); + posix->nlink = get_unaligned_le32(beg); + posix->reparse_tag = get_unaligned_le32(beg + 4); + posix->mode = get_unaligned_le32(beg + 8); sid = beg + 12; sid_len = posix_info_sid_size(sid, end); -- 2.53.0