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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/zstd/contrib/linux-kernel/test/RoundTripCrash.c | |
parent | Initial commit. (diff) | |
download | ceph-upstream.tar.xz ceph-upstream.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/zstd/contrib/linux-kernel/test/RoundTripCrash.c')
-rw-r--r-- | src/zstd/contrib/linux-kernel/test/RoundTripCrash.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/zstd/contrib/linux-kernel/test/RoundTripCrash.c b/src/zstd/contrib/linux-kernel/test/RoundTripCrash.c new file mode 100644 index 000000000..4f968023d --- /dev/null +++ b/src/zstd/contrib/linux-kernel/test/RoundTripCrash.c @@ -0,0 +1,162 @@ +/** + * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under both the BSD-style license (found in the + * LICENSE file in the root directory of this source tree) and the GPLv2 (found + * in the COPYING file in the root directory of this source tree). + */ + +/* + This program takes a file in input, + performs a zstd round-trip test (compression - decompress) + compares the result with original + and generates a crash (double free) on corruption detection. +*/ + +/*=========================================== +* Dependencies +*==========================================*/ +#include <stddef.h> /* size_t */ +#include <stdlib.h> /* malloc, free, exit */ +#include <stdio.h> /* fprintf */ +#include <linux/xxhash.h> +#include <linux/zstd.h> + +/*=========================================== +* Macros +*==========================================*/ +#define MIN(a,b) ( (a) < (b) ? (a) : (b) ) + +static const int kMaxClevel = 22; + +static ZSTD_CCtx *cctx = NULL; +void *cws = NULL; +static ZSTD_DCtx *dctx = NULL; +void *dws = NULL; +static void* cBuff = NULL; +static void* rBuff = NULL; +static size_t buffSize = 0; + + +/** roundTripTest() : +* Compresses `srcBuff` into `compressedBuff`, +* then decompresses `compressedBuff` into `resultBuff`. +* Compression level used is derived from first content byte. +* @return : result of decompression, which should be == `srcSize` +* or an error code if either compression or decompression fails. +* Note : `compressedBuffCapacity` should be `>= ZSTD_compressBound(srcSize)` +* for compression to be guaranteed to work */ +static size_t roundTripTest(void* resultBuff, size_t resultBuffCapacity, + void* compressedBuff, size_t compressedBuffCapacity, + const void* srcBuff, size_t srcBuffSize) +{ + size_t const hashLength = MIN(128, srcBuffSize); + unsigned const h32 = xxh32(srcBuff, hashLength, 0); + int const cLevel = h32 % kMaxClevel; + ZSTD_parameters const params = ZSTD_getParams(cLevel, srcBuffSize, 0); + size_t const cSize = ZSTD_compressCCtx(cctx, compressedBuff, compressedBuffCapacity, srcBuff, srcBuffSize, params); + if (ZSTD_isError(cSize)) { + fprintf(stderr, "Compression error : %u \n", ZSTD_getErrorCode(cSize)); + return cSize; + } + return ZSTD_decompressDCtx(dctx, resultBuff, resultBuffCapacity, compressedBuff, cSize); +} + + +static size_t checkBuffers(const void* buff1, const void* buff2, size_t buffSize) +{ + const char* ip1 = (const char*)buff1; + const char* ip2 = (const char*)buff2; + size_t pos; + + for (pos=0; pos<buffSize; pos++) + if (ip1[pos]!=ip2[pos]) + break; + + return pos; +} + +static void crash(int errorCode){ + /* abort if AFL/libfuzzer, exit otherwise */ + #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION /* could also use __AFL_COMPILER */ + abort(); + #else + exit(errorCode); + #endif +} + +static void roundTripCheck(const void* srcBuff, size_t srcBuffSize) +{ + size_t const neededBuffSize = ZSTD_compressBound(srcBuffSize); + + /* Allocate all buffers and contexts if not already allocated */ + if (neededBuffSize > buffSize) { + free(cBuff); + free(rBuff); + buffSize = 0; + + cBuff = malloc(neededBuffSize); + rBuff = malloc(neededBuffSize); + if (!cBuff || !rBuff) { + fprintf(stderr, "not enough memory ! \n"); + crash(1); + } + buffSize = neededBuffSize; + } + if (!cctx) { + ZSTD_compressionParameters const params = ZSTD_getCParams(kMaxClevel, 0, 0); + size_t const workspaceSize = ZSTD_CCtxWorkspaceBound(params); + cws = malloc(workspaceSize); + if (!cws) { + fprintf(stderr, "not enough memory ! \n"); + crash(1); + } + cctx = ZSTD_initCCtx(cws, workspaceSize); + if (!cctx) { + fprintf(stderr, "not enough memory ! \n"); + crash(1); + } + } + if (!dctx) { + size_t const workspaceSize = ZSTD_DCtxWorkspaceBound(); + dws = malloc(workspaceSize); + if (!dws) { + fprintf(stderr, "not enough memory ! \n"); + crash(1); + } + dctx = ZSTD_initDCtx(dws, workspaceSize); + if (!dctx) { + fprintf(stderr, "not enough memory ! \n"); + crash(1); + } + } + + { size_t const result = roundTripTest(rBuff, buffSize, cBuff, buffSize, srcBuff, srcBuffSize); + if (ZSTD_isError(result)) { + fprintf(stderr, "roundTripTest error : %u \n", ZSTD_getErrorCode(result)); + crash(1); + } + if (result != srcBuffSize) { + fprintf(stderr, "Incorrect regenerated size : %u != %u\n", (unsigned)result, (unsigned)srcBuffSize); + crash(1); + } + if (checkBuffers(srcBuff, rBuff, srcBuffSize) != srcBuffSize) { + fprintf(stderr, "Silent decoding corruption !!!"); + crash(1); + } + } + +#ifndef SKIP_FREE + free(cws); cws = NULL; cctx = NULL; + free(dws); dws = NULL; dctx = NULL; + free(cBuff); cBuff = NULL; + free(rBuff); rBuff = NULL; + buffSize = 0; +#endif +} + +int LLVMFuzzerTestOneInput(const unsigned char *srcBuff, size_t srcBuffSize) { + roundTripCheck(srcBuff, srcBuffSize); + return 0; +} |