diff options
| author | Roland Shoemaker <roland@golang.org> | 2021-11-18 13:30:55 -0800 |
|---|---|---|
| committer | Roland Shoemaker <roland@golang.org> | 2021-11-19 17:42:26 +0000 |
| commit | a94409660dbf05c1cdc2013aa2c7aa2489fe5c1c (patch) | |
| tree | 14f9ea0e37f6b1b023655740318797ce7d346ad6 /src/internal | |
| parent | e8cda0a6c925668972ada40602ada08468fa90dc (diff) | |
| download | go-a94409660dbf05c1cdc2013aa2c7aa2489fe5c1c.tar.gz go-a94409660dbf05c1cdc2013aa2c7aa2489fe5c1c.zip | |
internal/fuzz: compute correct number of mutations
When reconstructing inputs, we miscalculated the number of mutations
that needed to be applied. If the count%chainedMutation == 0 we would
apply 0 mutations, when we should actually be applying chainedMutation
mutations, due to how count is incremented.
Fixes #49047
Change-Id: I76773bff0afd6dfd40deafc317be095da995ecc5
Reviewed-on: https://go-review.googlesource.com/c/go/+/365294
Trust: Roland Shoemaker <roland@golang.org>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Katie Hockman <katie@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Diffstat (limited to 'src/internal')
| -rw-r--r-- | src/internal/fuzz/worker.go | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/internal/fuzz/worker.go b/src/internal/fuzz/worker.go index e7d824bea1..5be49d28f9 100644 --- a/src/internal/fuzz/worker.go +++ b/src/internal/fuzz/worker.go @@ -1111,7 +1111,8 @@ func (wc *workerClient) fuzz(ctx context.Context, entryIn CorpusEntry, args fuzz wc.m.r.restore(mem.header().randState, mem.header().randInc) if !args.Warmup { // Only mutate the valuesOut if fuzzing actually occurred. - for i := int64(0); i < resp.Count%chainedMutations; i++ { + numMutations := ((resp.Count - 1) % chainedMutations) + 1 + for i := int64(0); i < numMutations; i++ { wc.m.mutate(valuesOut, cap(mem.valueRef())) } } |