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Merge pull request #2540 from SamWhited/resolver_panic

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Fixes a panic in the DNS resolver
This commit is contained in:
Arko Dasgupta 2020-03-18 11:26:00 -07:00 • committed by GitHub
commit 2e64325fee
1 changed files with 1 additions and 1 deletions
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2
libnetwork/resolver.go
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@ -484,7 +484,7 @@ func (r *resolver) ServeDNS(w dns.ResponseWriter, query *dns.Msg) {
resp, err = co.ReadMsg()
// Truncated DNS replies should be sent to the client so that the
// client can retry over TCP
if err != nil && !resp.Truncated {
if err != nil && (resp != nil && !resp.Truncated) {
r.forwardQueryEnd()
logrus.Debugf("[resolver] read from DNS server failed, %s", err)
continue