Commit a5a37370 authored Mar 08, 2026 by Ilya Dryomov

libceph: admit message frames only in CEPH_CON_S_OPEN state



Similar checks are performed for all control frames, but an early check
for message frames was missing.  process_message() is already set up to
terminate the loop in case the state changes while con->ops->dispatch()
handler is being executed.

Cc: stable@vger.kernel.org
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Markuze <amarkuze@redhat.com>
Reviewed-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com>

parent 69fb5d91

net/ceph/messenger_v2.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2905,6 +2905,11 @@ static int __handle_control(struct ceph_connection con, void p)
		if (con->v2.in_desc.fd_tag != FRAME_TAG_MESSAGE)
		return process_control(con, p, end);

		if (con->state != CEPH_CON_S_OPEN) {
		con->error_msg = "protocol error, unexpected message";
		return -EINVAL;
		}

		ret = process_message_header(con, p, end);
		if (ret < 0)
		return ret;