diff options
| -rw-r--r-- | net/bluetooth/l2cap.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 36cd4e4e6ad..ac00f5fac2d 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -3627,10 +3627,17 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk if (l2cap_check_fcs(pi, skb)) goto drop; - if (__is_iframe(control)) + if (__is_iframe(control)) { + if (len < 4) + goto drop; + l2cap_data_channel_iframe(sk, control, skb); - else + } else { + if (len != 0) + goto drop; + l2cap_data_channel_sframe(sk, control, skb); + } goto done; @@ -3645,7 +3652,8 @@ static inline int l2cap_data_channel(struct l2cap_conn *conn, u16 cid, struct sk if (pi->fcs == L2CAP_FCS_CRC16) len -= 2; - if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || __is_sframe(control)) + if (len > L2CAP_DEFAULT_MAX_PDU_SIZE || len < 4 + || __is_sframe(control)) goto drop; if (l2cap_check_fcs(pi, skb)) |