From f6e6b16823de0aff31cb8ee8c098383e3aceec58 Mon Sep 17 00:00:00 2001 From: "Gustavo F. Padovan" Date: Sat, 1 May 2010 16:15:41 -0300 Subject: [PATCH] Bluetooth: Fix bug when retransmitting I-frames MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit If there is no frames to retransmit l2cap was crashing the kernel, now we check if the queue is empty first. Signed-off-by: Gustavo F. Padovan Reviewed-by: João Paulo Rechi Vita Signed-off-by: Marcel Holtmann --- net/bluetooth/l2cap.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index f9e4da2677af..4c7b2d22faa5 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -3546,7 +3546,8 @@ expected: if (pi->conn_state & L2CAP_CONN_REJ_ACT) pi->conn_state &= ~L2CAP_CONN_REJ_ACT; else { - sk->sk_send_head = TX_QUEUE(sk)->next; + if (!skb_queue_empty(TX_QUEUE(sk))) + sk->sk_send_head = TX_QUEUE(sk)->next; pi->next_tx_seq = pi->expected_ack_seq; l2cap_ertm_send(sk); } @@ -3593,7 +3594,8 @@ static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control) if (pi->conn_state & L2CAP_CONN_REJ_ACT) pi->conn_state &= ~L2CAP_CONN_REJ_ACT; else { - sk->sk_send_head = TX_QUEUE(sk)->next; + if (!skb_queue_empty(TX_QUEUE(sk))) + sk->sk_send_head = TX_QUEUE(sk)->next; pi->next_tx_seq = pi->expected_ack_seq; l2cap_ertm_send(sk); } @@ -3625,12 +3627,14 @@ static inline void l2cap_data_channel_rejframe(struct sock *sk, u16 rx_control) if (pi->conn_state & L2CAP_CONN_REJ_ACT) pi->conn_state &= ~L2CAP_CONN_REJ_ACT; else { - sk->sk_send_head = TX_QUEUE(sk)->next; + if (!skb_queue_empty(TX_QUEUE(sk))) + sk->sk_send_head = TX_QUEUE(sk)->next; pi->next_tx_seq = pi->expected_ack_seq; l2cap_ertm_send(sk); } } else { - sk->sk_send_head = TX_QUEUE(sk)->next; + if (!skb_queue_empty(TX_QUEUE(sk))) + sk->sk_send_head = TX_QUEUE(sk)->next; pi->next_tx_seq = pi->expected_ack_seq; l2cap_ertm_send(sk); -- 2.20.1