ksmbd: validate session id and tree id in the compound request
authorNamjae Jeon <linkinjeon@kernel.org>
Thu, 15 Jun 2023 13:05:29 +0000 (22:05 +0900)
committerSteve French <stfrench@microsoft.com>
Sat, 17 Jun 2023 02:04:51 +0000 (21:04 -0500)
commit5005bcb4219156f1bf7587b185080ec1da08518e
tree1205c29d96ed1aaf774f369681eb4c3dd68a7ea3
parent5fe7f7b78290638806211046a99f031ff26164e1
ksmbd: validate session id and tree id in the compound request

This patch validate session id and tree id in compound request.
If first operation in the compound is SMB2 ECHO request, ksmbd bypass
session and tree validation. So work->sess and work->tcon could be NULL.
If secound request in the compound access work->sess or tcon, It cause
NULL pointer dereferecing error.

Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-21165
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
fs/smb/server/server.c
fs/smb/server/smb2pdu.c