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

Close #1704 Close #1712 * commit '0848ca0e69e3c535b70e2d1f7e8c24f0e1941ee9': - rewrites: fix crash when handling name->cname->A chain
2020-05-21 14:58:32 +03:00 · 2020-05-21 14:58:32 +03:00 · 8d91e042cc
parent b5e78c760a 0848ca0e69
commit 8d91e042cc
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
 		}