1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/dvb/frontends/cx24110.c b/drivers/media/dvb/frontends/cx24110.c
index d15d32c51dc5..cc68b7e83b5e 100644
--- a/drivers/media/dvb/frontends/cx24110.c
+++ b/drivers/media/dvb/frontends/cx24110.c
@@ -418,6 +418,9 @@ static int cx24110_send_diseqc_msg(struct dvb_frontend* fe,
         struct cx24110_state *state = fe->demodulator_priv;
         unsigned long timeout;
 
+        if (cmd->msg_len < 3 || cmd->msg_len > 6)
+                return -EINVAL;  /* not implemented */
+
         for (i = 0; i < cmd->msg_len; i++)
                 cx24110_writereg(state, 0x79 + i, cmd->msg[i]);