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Fix bug in fuzzer ID length #12

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Fix bug in fuzzer ID length #12

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11 changes: 8 additions & 3 deletions client/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -95,9 +95,14 @@ func init() {

func usableHostName(orig string) (valid string) {
valid = invalidFuzzerNames.ReplaceAllString(orig, "_")
// fuzzer name is ${hostname}-xxxx, so this string can be max 29 chars
if len(valid) > 29 {
valid = valid[0:29]
// Max AFL fuzzer ID length is 32:
// https://github.com/mirrorer/afl/blob/2fb5a3482ec27b593c57258baae7089ebdc89043/afl-fuzz.c#L7456
//
// Our fuzzer ID is ${hostname}-xxxx, so the hostname portion can
// be max 32 - 5 = 27 chars.
maxHostnameLen := 27
if len(valid) > maxHostnameLen {
valid = valid[0:maxHostnameLen]
}
return
}
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