dns.ParseZone() parsing error leading to nil pointer dereference #742
Description
What did I do?
PoC.go
package main
import (
"fmt"
"strings"
"github.com/miekg/dns"
)
func main() {
r := strings.NewReader(` Ta 0 0 0`)
for x := range dns.ParseZone(r, "", "") {
if x.Error != nil {
fmt.Println(x.Error)
} else if x == nil {
// This should never be reached
fmt.Println("x == NIL")
} else {
// Do something with x.RR
fmt.Println(x.RR.String())
}
}
return
}What happened?
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x65a762]
goroutine 1 [running]:
main.main()
/path/to/gopath/src/fuzz/dns/worker/main.go:20 +0x122
exit status 2