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[libFuzzer] Fix MSan false positives with custom mutators.
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Authored by morehouse on Mon, Apr 12, 5:35 PM.

Details

Summary

We need to unpoison parameters before calling into MSan-instrumented
user-defined mutators.

Fixes https://github.com/google/oss-fuzz/issues/4605.

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morehouse requested review of this revision.Mon, Apr 12, 5:35 PM
morehouse created this revision.
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metzman accepted this revision.Tue, Apr 13, 7:35 AM

LGTM

Thanks!

This revision is now accepted and ready to land.Tue, Apr 13, 7:35 AM