[SCTP]: Remove temporary associations from backlog and hash.

Every time SCTP creates a temporary association, the stack hashes it,
puts it on a list of endpoint associations and increments the backlog.
However, the lifetime of a temporary association is the processing time
of a current packet and it's destroyed after that. In fact, we don't
really want anyone else finding this association. There is no reason to
do this extra work.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/sctp/input.c b/net/sctp/input.c
index 99c0501ca513..6d82f400d13c 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -771,6 +771,9 @@ static void __sctp_hash_established(struct sctp_association *asoc)
 /* Add an association to the hash. Local BH-safe. */
 void sctp_hash_established(struct sctp_association *asoc)
 {
+        if (asoc->temp)
+                return;
+
         sctp_local_bh_disable();
         __sctp_hash_established(asoc);
         sctp_local_bh_enable();
@@ -804,6 +807,9 @@ static void __sctp_unhash_established(struct sctp_association *asoc)
 /* Remove association from the hash table.  Local BH-safe. */
 void sctp_unhash_established(struct sctp_association *asoc)
 {
+        if (asoc->temp)
+                return;
+
         sctp_local_bh_disable();
         __sctp_unhash_established(asoc);
         sctp_local_bh_enable();