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 BFC932D7DF1; Tue, 21 Jul 2026 22:58:28 +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=1784674709; cv=none; b=qFjBc/t5GbOOLd4hKuvHIOF5+OpYvziAQXSjwNKkiMmWQz7DLzfQqEeTvbCCcHXvBbBCx/nxKcsq9Xd8XNrhOVIbef0vDq8RlLCKz2HNldP2AOnukZ3Ih/WCX2HEV3neffEkvujFVhBZezLescUp/JOLXUQ9gRkWU9ZY4WprdOc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784674709; c=relaxed/simple; bh=Kpc3BjjZz66SYEdmdGbpRRx8Xtl7GT4pUTL5kQGfwks=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Y+UcYXGgljc7PSNRxChoaqkovcfo2pZrPwXRfv8hcBQyUWVl4cgachlKF/A9pMVTlA/2McZfyWoUq2tDV8zTbbinZan/YjuY+V+tkmq2hecb3xkmBQMo5CdpBdeheTR5ZVVJmjxlM5xmtfiiKmX6Na5GxDVyiRmB85uYGMSmGqY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dOVYPjO4; 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="dOVYPjO4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3113B1F000E9; Tue, 21 Jul 2026 22:58:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784674708; bh=v2gRk3VIXaHHA2/moSYOmyB0wOVjoPqmbrtQZmwQg8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=dOVYPjO4tdj6NZK6dSgZjZ/R1ofHMsH85I3sXbLStMz8Kitje+2T9i0v4Puj1LoY9 RgOp1O0SnSJji2dwdwy0eEa3+v+yw8aiwWDKCFnzOLDCOG9usNjmZNjqh+kC4oIr/Q vzrTzTbVhoE+VThn7Fu76VOtxtPAjmsZSyJjipt8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zihan Xi , Ren Wei , Steve French , Sasha Levin Subject: [PATCH 5.10 644/699] smb: client: use unaligned reads in parse_posix_ctxt() Date: Tue, 21 Jul 2026 17:26:43 +0200 Message-ID: <20260721152410.278623263@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152355.667394603@linuxfoundation.org> References: <20260721152355.667394603@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 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ 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 Signed-off-by: Greg Kroah-Hartman --- fs/cifs/smb2pdu.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1973,9 +1973,9 @@ parse_posix_ctxt(struct create_context * 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);