While this currently cannot trigger any NULL pointer dereference in sctp_seq_dump_local_addrs(), better change the order of commands to prevent a future bug to happen. Although we first add SCTP_CMD_NEW_ASOC and then set the SCTP_CMD_INIT_CHOOSE_TRANSPORT, it is okay for now, since this primitive is only called by sctp_connect() or sctp_sendmsg() with sctp_assoc_add_peer() set first. However, lets do this precaution and first set the transport and then add it to the association hashlist to prevent in future something to possibly triggering this. Signed-off-by: Daniel Borkmann <dborkman@xxxxxxxxxx> --- net/sctp/sm_statefuns.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index de1a013..b3d1868 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -4632,16 +4632,16 @@ sctp_disposition_t sctp_sf_do_prm_asoc(struct net *net, if (!repl) goto nomem; + /* Choose transport for INIT. */ + sctp_add_cmd_sf(commands, SCTP_CMD_INIT_CHOOSE_TRANSPORT, + SCTP_CHUNK(repl)); + /* Cast away the const modifier, as we want to just * rerun it through as a sideffect. */ my_asoc = (struct sctp_association *)asoc; sctp_add_cmd_sf(commands, SCTP_CMD_NEW_ASOC, SCTP_ASOC(my_asoc)); - /* Choose transport for INIT. */ - sctp_add_cmd_sf(commands, SCTP_CMD_INIT_CHOOSE_TRANSPORT, - SCTP_CHUNK(repl)); - /* After sending the INIT, "A" starts the T1-init timer and * enters the COOKIE-WAIT state. */ -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
