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pkg/fuzzer, pkg/corpus: including fault injection into coverage but not corpus #5516

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pkg/fuzzer, pkg/corpus: including fault injection into coverage but not corpus #5516

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f4a75e2
docs/linux: update debug info kernel config
jwnhy Sep 5, 2024
a097dae
Merge branch 'google:master' into master
jwnhy Nov 15, 2024
d2be30d
Merge branch 'master' of github.com:jwnhy/syzkaller
jwnhy Nov 16, 2024
6eba381
pkg/fuzzer, pkg/corpus: including fault injection into coverage but n…
jwnhy Nov 16, 2024
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13 changes: 13 additions & 0 deletions pkg/corpus/corpus.go
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Original file line number Diff line number Diff line change
Expand Up @@ -124,6 +124,19 @@ type NewItemEvent struct {
NewCover []uint64
}

func (corpus *Corpus) CovOnlySave(inp NewInput) {
newCover := corpus.cover.MergeDiff(inp.Cover)
if corpus.updates != nil {
select {
case <-corpus.ctx.Done():
case corpus.updates <- NewItemEvent{
Exists: true, // we only saves the coverage
NewCover: newCover,
}:
}
}
}

func (corpus *Corpus) Save(inp NewInput) {
progData := inp.Prog.Serialize()
sig := hash.String(progData)
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15 changes: 13 additions & 2 deletions pkg/fuzzer/job.go
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Original file line number Diff line number Diff line change
Expand Up @@ -502,25 +502,36 @@
}

func (job *faultInjectionJob) run(fuzzer *Fuzzer) {
totalCover := cover.FromRaw([]uint64{})
for nth := 1; nth <= 100; nth++ {
fuzzer.Logf(2, "injecting fault into call %v, step %v",
job.call, nth)
newProg := job.p.Clone()
newProg.Calls[job.call].Props.FailNth = nth
result := fuzzer.execute(job.exec, &queue.Request{
Prog: newProg,
Stat: fuzzer.statExecFaultInject,
Prog: newProg,
ExecOpts: setFlags(flatrpc.ExecFlagCollectCover),
Stat: fuzzer.statExecFaultInject,
})
if result.Stop() {
return
}
info := result.Info
if info != nil && info.Extra != nil {
newCover := cover.FromRaw(info.Extra.Cover)
totalCover.Merge(newCover.Serialize())
}
if info != nil && len(info.Calls) > job.call &&
info.Calls[job.call].Flags&flatrpc.CallFlagFaultInjected == 0 {
break
}
}
input := corpus.NewInput{
Cover: totalCover.Serialize(),
}
fuzzer.Config.Corpus.CovOnlySave(input)

}

Check failure on line 534 in pkg/fuzzer/job.go

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GitHub Actions / build 

unnecessary trailing newline (whitespace)

type hintsJob struct {
exec queue.Executor
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