fuzz: fix rewrite crash by fixing fuzz/do.go
Automatically submitted.
@@ -13,15 +13,19 @@ import (
// Do will fuzz p - used by gofuzz. See Makefile.fuzz for comments and context.
func Do(p plugin.Handler, data []byte) int {
ctx := context.TODO()
- ret := 1
r := new(dns.Msg)
if err := r.Unpack(data); err != nil {
- ret = 0
+ return 0 // plugin will never be called when this happens.
+ }
+ // If the data unpack into a dns msg, but does not have a proper question section discard it.
+ // The server parts make sure this is true before calling the plugins; mimic this behavior.
+ if len(r.Question) == 0 {
+ return 0
}
if _, err := p.ServeDNS(ctx, &test.ResponseWriter{}, r); err != nil {
- ret = 1
+ return 1
}
- return ret
+ return 0
}
