From 2df012001d36e56cd92dab0255cf4bce3f5b16bc Mon Sep 17 00:00:00 2001 From: David Herrmann Date: Sat, 6 Apr 2013 20:28:48 +0200 Subject: Bluetooth: hidp: handle kernel_sendmsg() errors correctly We shouldn't push back the skbs if kernel_sendmsg() fails. Instead, we terminate the connection and drop the skb. Only on EAGAIN we push it back and return. l2cap doesn't return EAGAIN, yet, but this guarantees we're safe if it will at some time in the future. Signed-off-by: David Herrmann Acked-by: Marcel Holtmann Signed-off-by: Gustavo Padovan --- net/bluetooth/hidp/core.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) (limited to 'net/bluetooth/hidp') diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c index 481bbb8c7220..3f6ef0630a8e 100644 --- a/net/bluetooth/hidp/core.c +++ b/net/bluetooth/hidp/core.c @@ -639,13 +639,19 @@ static int hidp_send_frame(struct socket *sock, unsigned char *data, int len) static void hidp_process_intr_transmit(struct hidp_session *session) { struct sk_buff *skb; + int ret; BT_DBG("session %p", session); while ((skb = skb_dequeue(&session->intr_transmit))) { - if (hidp_send_frame(session->intr_sock, skb->data, skb->len) < 0) { + ret = hidp_send_frame(session->intr_sock, skb->data, skb->len); + if (ret == -EAGAIN) { skb_queue_head(&session->intr_transmit, skb); break; + } else if (ret < 0) { + hidp_session_terminate(session); + kfree_skb(skb); + break; } hidp_set_timer(session); @@ -656,13 +662,19 @@ static void hidp_process_intr_transmit(struct hidp_session *session) static void hidp_process_ctrl_transmit(struct hidp_session *session) { struct sk_buff *skb; + int ret; BT_DBG("session %p", session); while ((skb = skb_dequeue(&session->ctrl_transmit))) { - if (hidp_send_frame(session->ctrl_sock, skb->data, skb->len) < 0) { + ret = hidp_send_frame(session->ctrl_sock, skb->data, skb->len); + if (ret == -EAGAIN) { skb_queue_head(&session->ctrl_transmit, skb); break; + } else if (ret < 0) { + hidp_session_terminate(session); + kfree_skb(skb); + break; } hidp_set_timer(session); -- cgit v1.2.3