ksmbd: fix memory leak in smb2_handle_negotiate

ksmbd: fix memory leak in smb2_handle_negotiate

commit 708a296405bfb171beee19a7503717896a4d50b3 upstream.

The allocated memory didn't free under an error
path in smb2_handle_negotiate().

Fixes: c4a98f110ba0 ("cifsd: add server-side procedures for SMB3")
Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-17815
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>