From 5ec914e06c96ff40bf0e6567359c0de039b59ed2 Mon Sep 17 00:00:00 2001
From: Michael Tuexen <tuexen@FreeBSD.org>
Date: Tue, 31 Dec 2024 22:03:13 +0100
Subject: [PATCH] TCP BBR: fix condition when sending a tail loss probe

Reviewed by:		rrs
CID:			1523793
MFC after:		1 week
Sponsored by:		Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D48274
---
 sys/netinet/tcp_stacks/bbr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/netinet/tcp_stacks/bbr.c b/sys/netinet/tcp_stacks/bbr.c
index f440573ace3..3c586400798 100644
--- a/sys/netinet/tcp_stacks/bbr.c
+++ b/sys/netinet/tcp_stacks/bbr.c
@@ -4614,7 +4614,7 @@ need_retran:
 	 */
 	if (collapsed_win == 0) {
 		rsm = TAILQ_LAST_FAST(&bbr->r_ctl.rc_map, bbr_sendmap, r_next);
-		if (rsm && (BBR_ACKED | BBR_HAS_FIN)) {
+		if (rsm && (rsm->r_flags & (BBR_ACKED | BBR_HAS_FIN))) {
 			rsm = bbr_find_high_nonack(bbr, rsm);
 		}
 		if (rsm == NULL) {