vasilito
cb424d7448
verify-patch-sanity.py validates every active recipe .patch has internally- consistent hunk line counts — catching the 'malformed patch at line N' failure at commit/CI/preflight time instead of hours into a cook. This cycle hit that class three times (qtwaylandscanner, sddm, xwayland), each only discovered when cookbook tried to apply the patch. Running it across the repo found 29 latent malformed patches (validated against GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22'). They were harmless only because they sit in vendored recipes (baked, not re- applied) — but would fail on any version-bump re-derivation. --fix recounts the hunk headers (body untouched) and repaired all 29. Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test (test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats (empty placeholders, bare-@@ git hunks).
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// A fuzz target that consumes a Zlib-compressed input.
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// This test verifies that we can find this bug with a custom mutator.
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#include <cstddef>
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <zlib.h>
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// The fuzz target.
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// Uncompress the data, crash on input starting with "FU".
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// Good luck finding this w/o a custom mutator. :)
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
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uint8_t Uncompressed[100];
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size_t UncompressedLen = sizeof(Uncompressed);
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if (Z_OK != uncompress(Uncompressed, &UncompressedLen, Data, Size))
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return 0;
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if (UncompressedLen < 2) return 0;
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if (Uncompressed[0] == 'F' && Uncompressed[1] == 'U')
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abort(); // Boom
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return 0;
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}
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#ifdef CUSTOM_MUTATOR
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// Forward-declare the libFuzzer's mutator callback.
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extern "C" size_t
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LLVMFuzzerMutate(uint8_t *Data, size_t Size, size_t MaxSize);
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// The custom mutator:
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// * deserialize the data (in this case, uncompress).
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// * If the data doesn't deserialize, create a properly serialized dummy.
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// * Mutate the deserialized data (in this case, just call LLVMFuzzerMutate).
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// * Serialize the mutated data (in this case, compress).
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extern "C" size_t LLVMFuzzerCustomMutator(uint8_t *Data, size_t Size,
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size_t MaxSize, unsigned int Seed) {
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uint8_t Uncompressed[100];
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size_t UncompressedLen = sizeof(Uncompressed);
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size_t CompressedLen = MaxSize;
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if (Z_OK != uncompress(Uncompressed, &UncompressedLen, Data, Size)) {
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// The data didn't uncompress.
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// So, it's either a broken input and we want to ignore it,
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// or we've started fuzzing from an empty corpus and we need to supply
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// out first properly compressed input.
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uint8_t Dummy[] = {'H', 'i'};
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if (Z_OK != compress(Data, &CompressedLen, Dummy, sizeof(Dummy)))
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return 0;
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// fprintf(stderr, "Dummy: max %zd res %zd\n", MaxSize, CompressedLen);
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return CompressedLen;
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}
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UncompressedLen =
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LLVMFuzzerMutate(Uncompressed, UncompressedLen, sizeof(Uncompressed));
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if (Z_OK != compress(Data, &CompressedLen, Uncompressed, UncompressedLen))
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return 0;
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return CompressedLen;
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}
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#endif // CUSTOM_MUTATOR
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