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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2008-08-23 13:28:27 +0200
committerGerrit Renker <gerrit@erg.abdn.ac.uk>2008-09-04 07:45:25 +0200
commit48816322ad4d9ce195aaddd10f0ce98c944af193 (patch)
treebd4123966a18259cb8f93607ae077541920cf75c /net
parenteac7726bf5cd24440d84b166e0813668d1bf3224 (diff)
dccp: Empty the write queue when disconnecting
dccp_disconnect() can be called due to several reasons: 1. when the connection setup failed (inet_stream_connect()); 2. when shutting down (inet_shutdown(), inet_csk_listen_stop()); 3. when aborting the connection (dccp_close() with 0 linger time). In case (1) the write queue is empty. This patch empties the write queue, if in case (2) or (3) it was not yet empty. This avoids triggering the write-queue BUG_TRAP in sk_stream_kill_queues() later on. It also seems natural to do: when breaking an association, to delete all packets that were originally intended for the soon-disconnected end (compare with call to tcp_write_queue_purge in tcp_disconnect()). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Diffstat (limited to 'net')
-rw-r--r--net/dccp/proto.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 1ca3b26eed0f..ae66473b11fa 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -309,7 +309,9 @@ int dccp_disconnect(struct sock *sk, int flags)
sk->sk_err = ECONNRESET;
dccp_clear_xmit_timers(sk);
+
__skb_queue_purge(&sk->sk_receive_queue);
+ __skb_queue_purge(&sk->sk_write_queue);
if (sk->sk_send_head != NULL) {
__kfree_skb(sk->sk_send_head);
sk->sk_send_head = NULL;