--- net/dns/dns_config_service_posix.cc.orig	2026-01-14 08:33:23 UTC
+++ net/dns/dns_config_service_posix.cc
@@ -35,6 +35,11 @@
 #include "net/dns/dns_config_watcher_mac.h"
 #endif
 
+#if BUILDFLAG(IS_BSD)
+#include "base/command_line.h"
+#include "sandbox/policy/switches.h"
+#endif
+
 namespace net {
 
 namespace internal {
@@ -131,6 +136,11 @@ class DnsConfigServicePosix::Watcher : public DnsConfi
 
   bool Watch() override {
     CheckOnCorrectSequence();
+
+// pledge + unveil
+    base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+    if (!command_line->HasSwitch(sandbox::policy::switches::kNoSandbox))
+      return false;
 
     bool success = true;
     if (!config_watcher_.Watch(base::BindRepeating(&Watcher::OnConfigChanged,
