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[media] cec: add sanity check for msg->len

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Check (and warn) if the msg->len is too long or if it is 0.

Should never happen, but just in case...

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2016-07-12 11:10:41 -03:00 committed by Mauro Carvalho Chehab
parent 0385443fec
commit 52d802d65b
1 changed files with 3 additions and 0 deletions
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3
drivers/staging/media/cec/cec-adap.c
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@ -763,6 +763,9 @@ void cec_received_msg(struct cec_adapter *adap, struct cec_msg *msg)
bool is_reply = false;
bool valid_la = true;
if (WARN_ON(!msg->len || msg->len > CEC_MAX_MSG_SIZE))
return;
mutex_lock(&adap->lock);
msg->ts = ktime_get_ns();
msg->rx_status = CEC_RX_STATUS_OK;