From 4b1a05fcf81b4343d29aeb86394d44f29d2116a4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20L=C3=A9caille?= <flecaille@haproxy.com>
Date: Sun, 17 Jan 2021 13:08:39 +0100
Subject: [PATCH] BUG/MINOR: peers: Possible appctx pointer dereference.

This bug may occur when enabling peers traces. It is possible that
peer->appctx is NULL when entering peer_session_release().
---
 src/peers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/peers.c b/src/peers.c
index e5b1e5714..754d73a8a 100644
--- a/src/peers.c
+++ b/src/peers.c
@@ -425,7 +425,7 @@ static void peers_trace(enum trace_level level, uint64_t mask,
 			const struct peer *peer = a2;
 			struct peers *peers = NULL;
 
-			if (peer) {
+			if (peer && peer->appctx) {
 				struct stream_interface *si;
 
 				si = peer->appctx->owner;