Commit 027f6e1a authored Nov 07, 2007 by Vlad Yasevich

SCTP: Fix a potential race between timers and receive path.



There is a possible race condition where the timer code will
free the association and the next packet in the queue will also
attempt to free the same association.

The example is, when we receive an ABORT at about the same time
as the retransmission timer fires.  If the timer wins the race,
it will free the association.  Once it releases the lock, the
queue processing will recieve the ABORT and will try to free
the association again.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>

parent 73d9c4fd

net/sctp/inqueue.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -90,6 +90,10 @@ void sctp_inq_free(struct sctp_inq *queue)
		void sctp_inq_push(struct sctp_inq q, struct sctp_chunk chunk)
		{
		/* Directly call the packet handling routine. */
		if (chunk->rcvr->dead) {
		sctp_chunk_free(chunk);
		return;
		}

		/* We are now calling this either from the soft interrupt
		* or from the backlog processing.

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