diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2016-07-12 11:10:41 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-07-13 07:58:12 -0300 |
| commit | 52d802d65b56a399aa67a9d3f26f232116d3e256 (patch) | |
| tree | d09f3a743b5ea319a5bda38bc849c04d26ef05bc | |
| parent | 0385443fec6b56b4b22f1940ab8607a074a5c17a (diff) | |
[media] cec: add sanity check for msg->len
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>
| -rw-r--r-- | drivers/staging/media/cec/cec-adap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/staging/media/cec/cec-adap.c b/drivers/staging/media/cec/cec-adap.c index f184bf6945cc..3925e0ae62a5 100644 --- a/drivers/staging/media/cec/cec-adap.c +++ b/drivers/staging/media/cec/cec-adap.c @@ -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; |