In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in compound request smb2_get_msg()
in smb2getksmbdtcon() and smb2checkusersession() will always return the first request smb2 header in a compound request. if SMB2_TREE_CONNECT_HE
is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbdreqbuf_next() to get current command in compound.