1 files changed, 10 insertions, 4 deletions

diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 55a61aa69662..7288192f7df5 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -5432,9 +5432,13 @@ sctp_disposition_t sctp_sf_t2_timer_expire(const struct sctp_endpoint *ep,
         if (!reply)
                 goto nomem;
 
-        /* Do some failure management (Section 8.2). */
-        sctp_add_cmd_sf(commands, SCTP_CMD_STRIKE,
-                        SCTP_TRANSPORT(asoc->shutdown_last_sent_to));
+        /* Do some failure management (Section 8.2).
+         * If we remove the transport an SHUTDOWN was last sent to, don't
+         * do failure management.
+         */
+        if (asoc->shutdown_last_sent_to)
+                sctp_add_cmd_sf(commands, SCTP_CMD_STRIKE,
+                                SCTP_TRANSPORT(asoc->shutdown_last_sent_to));
 
         /* Set the transport for the SHUTDOWN/ACK chunk and the timeout for
          * the T2-shutdown timer.
@@ -5471,7 +5475,9 @@ sctp_disposition_t sctp_sf_t4_timer_expire(
          * detection on the appropriate destination address as defined in
          * RFC2960 [5] section 8.1 and 8.2.
          */
-        sctp_add_cmd_sf(commands, SCTP_CMD_STRIKE, SCTP_TRANSPORT(transport));
+        if (transport)
+                sctp_add_cmd_sf(commands, SCTP_CMD_STRIKE,
+                                SCTP_TRANSPORT(transport));
 
         /* Reconfig T4 timer and transport. */
         sctp_add_cmd_sf(commands, SCTP_CMD_SETUP_T4, SCTP_CHUNK(chunk));