Commit 63d01330 authored by Marcelo Ricardo Leitner's avatar Marcelo Ricardo Leitner Committed by David S. Miller

sctp: honor PMTU_DISABLED when handling icmp

sctp_sendmsg() could trigger PMTU updates even when PMTU_DISABLED was
set, as pmtu_pending could be set unconditionally during icmp handling
if the socket was in use by the application.

This patch fixes it by checking for PMTU_DISABLED when handling such
deferred updates.
Signed-off-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6e91b578
...@@ -1893,6 +1893,7 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, ...@@ -1893,6 +1893,7 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
struct sctp_sndrcvinfo *sinfo) struct sctp_sndrcvinfo *sinfo)
{ {
struct sock *sk = asoc->base.sk; struct sock *sk = asoc->base.sk;
struct sctp_sock *sp = sctp_sk(sk);
struct net *net = sock_net(sk); struct net *net = sock_net(sk);
struct sctp_datamsg *datamsg; struct sctp_datamsg *datamsg;
bool wait_connect = false; bool wait_connect = false;
...@@ -1911,12 +1912,13 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, ...@@ -1911,12 +1912,13 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
goto err; goto err;
} }
if (sctp_sk(sk)->disable_fragments && msg_len > asoc->frag_point) { if (sp->disable_fragments && msg_len > asoc->frag_point) {
err = -EMSGSIZE; err = -EMSGSIZE;
goto err; goto err;
} }
if (asoc->pmtu_pending) { if (asoc->pmtu_pending) {
if (sp->param_flags & SPP_PMTUD_ENABLE)
sctp_assoc_sync_pmtu(asoc); sctp_assoc_sync_pmtu(asoc);
asoc->pmtu_pending = 0; asoc->pmtu_pending = 0;
} }
...@@ -1936,7 +1938,7 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc, ...@@ -1936,7 +1938,7 @@ static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
if (err) if (err)
goto err; goto err;
if (sctp_sk(sk)->strm_interleave) { if (sp->strm_interleave) {
timeo = sock_sndtimeo(sk, 0); timeo = sock_sndtimeo(sk, 0);
err = sctp_wait_for_connect(asoc, &timeo); err = sctp_wait_for_connect(asoc, &timeo);
if (err) if (err)
......
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