- rewrites: fix crash when handling name->cname->A chain

crash.adguard -> adguard.a.record adguard.a.record -> 1.2.3.4
2020-05-21 14:48:31 +03:00 · 2020-05-21 14:48:31 +03:00 · 0848ca0e69
parent 2d1cba67dc
commit 0848ca0e69
1 changed files with 3 additions and 0 deletions
--- a/dnsforward/handle_dns.go
+++ b/dnsforward/handle_dns.go
@ -211,6 +211,9 @@ func processFilteringAfterResponse(ctx *dnsContext) int {

 	switch res.Reason {
 	case dnsfilter.ReasonRewrite:
+		if d.Res != nil {
+			break // response is already prepared
+		}
 		if len(res.CanonName) == 0 {
 			break
 		}