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Add fuzz tests, rename fuzz tests and fix panic found by fuzzing (#72)

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* begin adding better fuzz test

* finish adding working fuzzer

* implement mutateipv4

* fuzzer finds a panic in ICMP client on receive empty payload

* rename fuzz tests to reflect fuzz methodology
This commit is contained in:
Pat Whittingslow
2026-04-11 11:09:51 -03:00
committed by GitHub
parent 68461b4416
commit 66a1aec593
226 changed files with 835 additions and 20 deletions
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ipv4/icmpv4/client.go
+7 -1
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@@ -113,6 +113,9 @@ func (client *Client) Demux(carrierData []byte, frameOffset int) error {
// We received a ping request; not handled client-side.
efrm := FrameEcho{Frame: ifrm}
data := efrm.Data()
if len(data) == 0 {
return lneto.ErrPacketDrop
}
n, werr := client.responseRing.Write(data)
if werr != nil {
err = werr
@@ -127,6 +130,9 @@ func (client *Client) Demux(carrierData []byte, frameOffset int) error {
case TypeEchoReply:
efrm := FrameEcho{Frame: ifrm}
data := efrm.Data()
if len(data) == 0 {
return lneto.ErrPacketDrop
}
hash := client.magichash(data, len(data)) & keyHashBits
idx := client.pingidx(hash)
if idx < 0 || (ipEnabled && client.outgoingEcho[idx].raddr != raddr) {
@@ -232,7 +238,7 @@ func (client *Client) magichash(pattern []byte, size int) (hash uint32) {
}
func (client *Client) PingStart(remoteAddr [4]byte, pattern []byte, size uint16) (key uint32, err error) {
if int(size) < len(pattern) {
if int(size) < len(pattern) || len(pattern) == 0 {
return 0, lneto.ErrInvalidConfig
} else if remoteAddr == [4]byte{} {
return 0, lneto.ErrZeroDestination