From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Ricardo Leitner Subject: [PATCH] sctp: do not leak chunks that are sent to unconfirmed paths Date: Fri, 18 Mar 2016 18:39:19 -0300 Message-ID: <1458337159-22792-4-git-send-email-marcelo.leitner@gmail.com> Cc: Neil Horman , Vlad Yasevich , linux-sctp@vger.kernel.org To: netdev@vger.kernel.org Return-path: Received: from mx1.redhat.com ([209.132.183.28]:43785 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932510AbcCRVjz (ORCPT ); Fri, 18 Mar 2016 17:39:55 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Currently, if a chunk is scheduled to be sent through a transport that is currently unconfirmed, it will be leaked as it is dequeued from outq and is not re-queued nor freed. As I'm not aware of any situation that may lead to this situation, I'm fixing this by freeing the chunk and also logging a trace so that we can fix the other bug if it ever happens. Signed-off-by: Marcelo Ricardo Leitner --- net/sctp/outqueue.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c index f03541d0f12d052d1f58901d57852be46f18a15a..8d3d3625130ee0fd294998554a9290d57eae56e7 100644 --- a/net/sctp/outqueue.c +++ b/net/sctp/outqueue.c @@ -978,8 +978,12 @@ static int sctp_outq_flush(struct sctp_outq *q, int rtx_timeout, gfp_t gfp) (new_transport->state == SCTP_UNCONFIRMED) || (new_transport->state == SCTP_PF))) new_transport = asoc->peer.active_path; - if (new_transport->state == SCTP_UNCONFIRMED) + if (new_transport->state == SCTP_UNCONFIRMED) { + WARN_ONCE(1, "Atempt to send packet on unconfirmed path."); + sctp_chunk_fail(chunk, 0); + sctp_chunk_free(chunk); continue; + } /* Change packets if necessary. */ if (new_transport != transport) { -- 2.5.0