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).
42 lines
1.3 KiB
C++
42 lines
1.3 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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// This test computes a checksum of the data (all but the last 4 bytes),
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// and then compares the last 4 bytes with the computed value.
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// A fuzzer with cmp traces is expected to defeat this check.
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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// A modified jenkins_one_at_a_time_hash initialized by non-zero,
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// so that simple_hash(0) != 0. See also
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// https://en.wikipedia.org/wiki/Jenkins_hash_function
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static uint32_t simple_hash(const uint8_t *Data, size_t Size) {
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uint32_t Hash = 0x12039854;
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for (uint32_t i = 0; i < Size; i++) {
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Hash += Data[i];
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Hash += (Hash << 10);
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Hash ^= (Hash >> 6);
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}
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Hash += (Hash << 3);
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Hash ^= (Hash >> 11);
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Hash += (Hash << 15);
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return Hash;
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
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if (Size < 14)
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return 0;
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uint32_t Hash = simple_hash(&Data[0], Size - 4);
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uint32_t Want = reinterpret_cast<const uint32_t *>(&Data[Size - 4])[0];
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if (Hash != Want)
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return 0;
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fprintf(stderr, "BINGO; simple_hash defeated: %x == %x\n", (unsigned int)Hash,
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(unsigned int)Want);
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exit(1);
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return 0;
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}
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