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5c81f34935
We have been using `uint8_t *`, which works fine as far as linking goes, but leads fuzz target developers to sometimes forget why they can't just modify the passed in string instead of copying it for modification (e.g. to NUL-terminate). REF: https://llvm.org/docs/LibFuzzer.html#fuzz-target Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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Fuzzing for lzxpress_huffman_compress_talloc
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Copyright (C) Michael Hanselmann 2019
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Copyright (C) Douglas Bagnall 2022 <dbagnall@samba.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "fuzzing/fuzzing.h"
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#include "compression/lzxpress_huffman.h"
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int LLVMFuzzerInitialize(int *argc, char ***argv)
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{
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return 0;
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}
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#define MAX_SIZE (1024 * 1024)
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int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
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{
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static uint8_t *output;
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size_t output_len;
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TALLOC_CTX *mem_ctx = NULL;
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struct lzxhuff_compressor_mem cmp_mem;
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/*
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* The round-trip fuzzer checks the compressor with an unconstrained
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* output buffer; here we see what happens if the buffer is possibly too
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* small.
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*/
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if (len < 3) {
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return 0;
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}
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output_len = MIN(MAX_SIZE, buf[0] | (buf[1] << 8) | (buf[2] << 16));
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buf += 3;
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len -= 3;
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mem_ctx = talloc_new(NULL);
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output = talloc_array(mem_ctx, uint8_t, output_len);
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lzxpress_huffman_compress(&cmp_mem, buf, len, output, output_len);
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talloc_free(mem_ctx);
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return 0;
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}
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