sctp: fix the transport error_count check

BugLink: https://bugs.launchpad.net/bugs/1841652
[ Upstream commit a1794de8b92ea6bc2037f445b296814ac826693e ]

As the annotation says in sctp_do_8_2_transport_strike():

  "If the transport error count is greater than the pf_retrans
   threshold, and less than pathmaxrtx ..."

It should be transport->error_count checked with pathmaxrxt,
instead of asoc->pf_retrans.

Fixes: 5aa93bcf66f4 ("sctp: Implement quick failover draft from tsvwg")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 17f3b632d4b5209880909fcc54ddb229ef2c0caf..749154db77db8858916cfba31dc71405cabb44f5 100644 (file)
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -561,7 +561,7 @@ static void sctp_do_8_2_transport_strike(struct sctp_cmd_seq *commands,
         */
        if (net->sctp.pf_enable &&
           (transport->state == SCTP_ACTIVE) &&
-          (asoc->pf_retrans < transport->pathmaxrxt) &&
+          (transport->error_count < transport->pathmaxrxt) &&
           (transport->error_count > asoc->pf_retrans)) {
 
                sctp_assoc_control_transport(asoc, transport,