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ksmbd: fix memleak in session setup

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commit 6d7cb549c2 upstream.

If client send session setup request with unknown NTLMSSP message type,
session that does not included channel can be created. It will cause
session memleak. because ksmbd_sessions_deregister() does not destroy
session if channel is not included. This patch return error response if
client send the request unknown NTLMSSP message type.

Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20593
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Namjae Jeon 2023-05-03 08:26:45 +09:00 committed by Greg Kroah-Hartman
parent 227eb2689b
commit 671f21fbcb
1 changed files with 4 additions and 0 deletions
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4
fs/ksmbd/smb2pdu.c
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@ -1786,6 +1786,10 @@ int smb2_sess_setup(struct ksmbd_work *work)
}
kfree(sess->Preauth_HashValue);
sess->Preauth_HashValue = NULL;
} else {
pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
le32_to_cpu(negblob->MessageType));
rc = -EINVAL;
}
} else {
/* TODO: need one more negotiation */