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-rw-r--r--include/net/sctp/sctp.h8
-rw-r--r--net/sctp/associola.c3
-rw-r--r--net/sctp/input.c3
-rw-r--r--net/sctp/transport.c4
4 files changed, 11 insertions, 7 deletions
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index 835aa2ed9870..ad2136caa7d6 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -82,6 +82,11 @@
#define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT
#endif
+/* Round an int up to the next multiple of 4. */
+#define WORD_ROUND(s) (((s)+3)&~3)
+/* Truncate to the previous multiple of 4. */
+#define WORD_TRUNC(s) ((s)&~3)
+
/*
* Function declarations.
*/
@@ -475,9 +480,6 @@ for (pos = chunk->subh.fwdtsn_hdr->skip;\
(void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\
pos++)
-/* Round an int up to the next multiple of 4. */
-#define WORD_ROUND(s) (((s)+3)&~3)
-
/* External references. */
extern struct proto sctp_prot;
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index a19b3e607703..e1849f3714ad 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -1406,7 +1406,8 @@ void sctp_assoc_sync_pmtu(struct sock *sk, struct sctp_association *asoc)
list_for_each_entry(t, &asoc->peer.transport_addr_list,
transports) {
if (t->pmtu_pending && t->dst) {
- sctp_transport_update_pmtu(sk, t, dst_mtu(t->dst));
+ sctp_transport_update_pmtu(sk, t,
+ WORD_TRUNC(dst_mtu(t->dst)));
t->pmtu_pending = 0;
}
if (!pmtu || (t->pathmtu < pmtu))
diff --git a/net/sctp/input.c b/net/sctp/input.c
index db76f1ab4ac2..00b8445364e3 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -606,7 +606,8 @@ void sctp_v4_err(struct sk_buff *skb, __u32 info)
/* PMTU discovery (RFC1191) */
if (ICMP_FRAG_NEEDED == code) {
- sctp_icmp_frag_needed(sk, asoc, transport, info);
+ sctp_icmp_frag_needed(sk, asoc, transport,
+ WORD_TRUNC(info));
goto out_unlock;
} else {
if (ICMP_PROT_UNREACH == code) {
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index d517153891a6..9b6b48c7524e 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -226,7 +226,7 @@ void sctp_transport_pmtu(struct sctp_transport *transport, struct sock *sk)
}
if (transport->dst) {
- transport->pathmtu = dst_mtu(transport->dst);
+ transport->pathmtu = WORD_TRUNC(dst_mtu(transport->dst));
} else
transport->pathmtu = SCTP_DEFAULT_MAXSEGMENT;
}
@@ -280,7 +280,7 @@ void sctp_transport_route(struct sctp_transport *transport,
return;
}
if (transport->dst) {
- transport->pathmtu = dst_mtu(transport->dst);
+ transport->pathmtu = WORD_TRUNC(dst_mtu(transport->dst));
/* Initialize sk->sk_rcv_saddr, if the transport is the
* association's active path for getsockname().