upstream: clone req

AdguardTeam · Apr 11, 2023 · 76dd0bd · 76dd0bd
1 parent b5ed387
commit 76dd0bd
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/upstream/parallel.go b/upstream/parallel.go
@@ -150,6 +150,7 @@ func exchangeAsync(u Upstream, req *dns.Msg, respCh chan *exchangeResult) {
 // exchangeAndLog wraps the [Upstream.Exchange] method with logging.
 func exchangeAndLog(u Upstream, req *dns.Msg) (resp *dns.Msg, err error) {
 	addr := u.Address()
+	req = req.Copy()
 
 	start := time.Now()
 	reply, err := u.Exchange(req)