Pull request 248: 323 check nil dns64

Merge in GO/dnsproxy from 323-check-nil-dns64 to master * commit 'cef86d7c7568abdd708a4647d556204de151a4f7': proxy: imp fmt Prevent reading from a nil response in DNS64
AdguardTeam · Mar 20, 2023 · f9672a9 · f9672a9
2 parents b673fef + cef86d7
commit f9672a9
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/proxy/dns64.go b/proxy/dns64.go
@@ -302,6 +302,10 @@ func (p *Proxy) performDNS64(
 	origResp *dns.Msg,
 	upstreams []upstream.Upstream,
 ) (u upstream.Upstream) {
+	if origResp == nil {
+		return nil
+	}
+
 	dns64Req := p.checkDNS64(origReq, origResp)
 	if dns64Req == nil {
 		return nil