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Add decoder fuzzing#34

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Shnatsel wants to merge 14 commits intogendx:mastergendx/lzma-rs:masterfrom Shnatsel:decoder-fuzzingShnatsel/lzma-rs:decoder-fuzzingCopy head branch name to clipboard

+213-3

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Commits on Apr 15, 2020

• Ignore checksum mismatch when decoding XZ files during fuzzing. This allows random data from fuzzer to reach actually interesting code.

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  398c505

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• Add fuzzing target for XZ decompression

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  8fee2ce

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• Add fuzzing targets for LZMA and LZMA2

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Commits on Apr 16, 2020

• Add initial fuzzing harness for comparing output against xz2 crate (liblzma wrapper)

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  4ff39e2

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• Mark unused variable as unused

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  b367ffb

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• Add fuzzing corpus; xz decoding was seeded with official xz test suite (public domain), the rest with files from tests

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• Register compare_xz fuzzing harness in Cargo.toml

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  19f203d

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• Drop huge files from LZMA corpus. The reduced corpus has nearly identical coverage

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• Use decompression corpus also for cross-checking decompression against xz2

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• Expand xz decompression corpus a little bit

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• Add fuzzing README

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• Fix path to output comparison fuzzing target

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  9557a33

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• Fix XZ result comparison fuzz target

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  c22dd7c

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• Address compiler warning

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