From 10a43cea7da841cf85a778a1a4d367fb2de7cbce Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Sun, 26 Apr 2009 23:14:42 +0800 Subject: sctp: fix panic when T4-rto timer expire on removed transport If T4-rto timer is expired on a removed transport, kernel panic will occur when we do failure management on that transport. You can reproduce this use the following sequence: Endpoint A Endpoint B (ESTABLISHED) (ESTABLISHED) <----------------- ASCONF (SRC=X) ASCONF -----------------> (Delete IP Address = X) <----------------- ASCONF-ACK (Success Indication) <----------------- ASCONF (T4-rto timer expire) This patch fixed the problem. Signed-off-by: Wei Yongjun Signed-off-by: Vlad Yasevich --- net/sctp/associola.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'net/sctp/associola.c') diff --git a/net/sctp/associola.c b/net/sctp/associola.c index 3be28fed5915..8d3aef9d0615 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -575,6 +575,13 @@ void sctp_assoc_rm_peer(struct sctp_association *asoc, if (asoc->shutdown_last_sent_to == peer) asoc->shutdown_last_sent_to = NULL; + /* If we remove the transport an ASCONF was last sent to, set it to + * NULL. + */ + if (asoc->addip_last_asconf && + asoc->addip_last_asconf->transport == peer) + asoc->addip_last_asconf->transport = NULL; + asoc->peer.transport_count--; sctp_transport_free(peer); -- cgit v1.2.3