diff options
| -rw-r--r-- | plugin/file/lookup.go | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/plugin/file/lookup.go b/plugin/file/lookup.go index 6eeb4c397..cba1eec50 100644 --- a/plugin/file/lookup.go +++ b/plugin/file/lookup.go @@ -171,7 +171,12 @@ func (z *Zone) Lookup(ctx context.Context, state request.Request, qname string) return z.externalLookup(ctx, state, elem, rrs) } - rrs := elem.Type(qtype) + treeRRs := elem.Type(qtype) + // make a copy of the element RRs to prevent response writers from mutating the tree + rrs := make([]dns.RR, len(treeRRs)) + for i, rr := range treeRRs { + rrs[i] = dns.Copy(rr) + } // NODATA if len(rrs) == 0 { |