--- net/sctp/input.c

+++ net/sctp/input.c

@@ -427,11 +427,25 @@ void sctp_icmp_proto_unreachable(struct

{

SCTP_DEBUG_PRINTK("%s\n", __func__);

- sctp_do_sm(SCTP_EVENT_T_OTHER,

- SCTP_ST_OTHER(SCTP_EVENT_ICMP_PROTO_UNREACH),

- asoc->state, asoc->ep, asoc, t,

- GFP_ATOMIC);

+ if (sock_owned_by_user(sk)) {

+ if (timer_pending(&t->proto_unreach_timer))

+ return;

+ else {

+ if (!mod_timer(&t->proto_unreach_timer,

+ jiffies + (HZ/20)))

+ sctp_association_hold(asoc);

+ }

+ } else {

+ if (timer_pending(&t->proto_unreach_timer) &&

+ del_timer(&t->proto_unreach_timer))

+ sctp_association_put(asoc);

+

+ sctp_do_sm(SCTP_EVENT_T_OTHER,

+ SCTP_ST_OTHER(SCTP_EVENT_ICMP_PROTO_UNREACH),

+ asoc->state, asoc->ep, asoc, t,

+ GFP_ATOMIC);

+ }

}

/* Common lookup code for icmp/icmpv6 error handler. */