[PATCH 4.19 79/85] sctp: fix the transport error_count check

Greg Kroah-Hartman
2019-08-22T17:27:49Z

From: Xin Long <lucien.xin@gmail.com>

[ 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>
---
net/sctp/sm_sideeffect.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -561,7 +561,7 @@ static void sctp_do_8_2_transport_strike
*/
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,