From bcdb3b7d5076cf6ad17cb70df8db22d876880ada Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Tue, 15 Dec 2020 01:13:32 +0900
Subject: [PATCH] core: detect_container() may return negative errno

---
 src/core/bpf-firewall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/bpf-firewall.c b/src/core/bpf-firewall.c
index 44aa1bfb1e..5952eaf2f7 100644
--- a/src/core/bpf-firewall.c
+++ b/src/core/bpf-firewall.c
@@ -893,7 +893,7 @@ void emit_bpf_firewall_warning(Unit *u) {
         static bool warned = false;
 
         if (!warned) {
-                bool quiet = bpf_firewall_unsupported_reason == -EPERM && detect_container();
+                bool quiet = bpf_firewall_unsupported_reason == -EPERM && detect_container() > 0;
 
                 log_unit_full_errno(u, quiet ? LOG_DEBUG : LOG_WARNING, bpf_firewall_unsupported_reason,
                                     "unit configures an IP firewall, but %s.\n"