From: Jere Leppänen jere.leppanen@nokia.com
commit 145cb2f7177d94bc54563ed26027e952ee0ae03c upstream.
When we start shutdown in sctp_sf_do_dupcook_a(), we want to bundle the SHUTDOWN with the COOKIE-ACK to ensure that the peer receives them at the same time and in the correct order. This bundling was broken by commit 4ff40b86262b ("sctp: set chunk transport correctly when it's a new asoc"), which assigns a transport for the COOKIE-ACK, but not for the SHUTDOWN.
Fix this by passing a reference to the COOKIE-ACK chunk as an argument to sctp_sf_do_9_2_start_shutdown() and onward to sctp_make_shutdown(). This way the SHUTDOWN chunk is assigned the same transport as the COOKIE-ACK chunk, which allows them to be bundled.
In sctp_sf_do_9_2_start_shutdown(), the void *arg parameter was previously unused. Now that we're taking it into use, it must be a valid pointer to a chunk, or NULL. There is only one call site where it's not, in sctp_sf_autoclose_timer_expire(). Fix that too.
Fixes: 4ff40b86262b ("sctp: set chunk transport correctly when it's a new asoc") Signed-off-by: Jere Leppänen jere.leppanen@nokia.com Acked-by: Marcelo Ricardo Leitner marcelo.leitner@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Cc: Guenter Roeck linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/sctp/sm_statefuns.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -1880,7 +1880,7 @@ static enum sctp_disposition sctp_sf_do_ */ sctp_add_cmd_sf(commands, SCTP_CMD_REPLY, SCTP_CHUNK(repl)); return sctp_sf_do_9_2_start_shutdown(net, ep, asoc, - SCTP_ST_CHUNK(0), NULL, + SCTP_ST_CHUNK(0), repl, commands); } else { sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, @@ -5483,7 +5483,7 @@ enum sctp_disposition sctp_sf_do_9_2_sta * in the Cumulative TSN Ack field the last sequential TSN it * has received from the peer. */ - reply = sctp_make_shutdown(asoc, NULL); + reply = sctp_make_shutdown(asoc, arg); if (!reply) goto nomem;
@@ -6081,7 +6081,7 @@ enum sctp_disposition sctp_sf_autoclose_ disposition = SCTP_DISPOSITION_CONSUME; if (sctp_outq_is_empty(&asoc->outqueue)) { disposition = sctp_sf_do_9_2_start_shutdown(net, ep, asoc, type, - arg, commands); + NULL, commands); }
return disposition;