linux-kernel - [PATCH 5.10 180/252] SMB3: incorrect file id in requests compounded with open

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Message-Id: <20210531130704.129975469@linuxfoundation.org>
Date:   Mon, 31 May 2021 15:14:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Steve French <stfrench@...rosoft.com>,
        Stefan Metzmacher <metze@...ba.org>,
        Shyam Prasad N <sprasad@...rosoft.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 180/252] SMB3: incorrect file id in requests compounded with open

From: Steve French <stfrench@...rosoft.com>

[ Upstream commit c0d46717b95735b0eacfddbcca9df37a49de9c7a ]

See MS-SMB2 3.2.4.1.4, file ids in compounded requests should be set to
0xFFFFFFFFFFFFFFFF (we were treating it as u32 not u64 and setting
it incorrectly).

Signed-off-by: Steve French <stfrench@...rosoft.com>
Reported-by: Stefan Metzmacher <metze@...ba.org>
Reviewed-by: Shyam Prasad N <sprasad@...rosoft.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 0ce92d958fd6..ab509965656e 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3898,10 +3898,10 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
 			 * Related requests use info from previous read request
 			 * in chain.
 			 */
-			shdr->SessionId = 0xFFFFFFFF;
+			shdr->SessionId = 0xFFFFFFFFFFFFFFFF;
 			shdr->TreeId = 0xFFFFFFFF;
-			req->PersistentFileId = 0xFFFFFFFF;
-			req->VolatileFileId = 0xFFFFFFFF;
+			req->PersistentFileId = 0xFFFFFFFFFFFFFFFF;
+			req->VolatileFileId = 0xFFFFFFFFFFFFFFFF;
 		}
 	}
 	if (remaining_bytes > io_parms->length)
-- 
2.30.2