Commit 9982122d authored by Paul Kehrer's avatar Paul Kehrer Committed by Thomas Daede

add fuzzers and build script from OSS-Fuzz

parent 112d3bd0
#!/bin/bash -eu
pushd $SRC
mv people.xiph.org/*.ogg decode_corpus/
zip -r "$OUT/decode_fuzzer_seed_corpus.zip" decode_corpus/
popd
pushd $SRC/ogg
./autogen.sh
./configure --prefix="$WORK" --enable-static --disable-shared --disable-crc
make clean
make -j$(nproc)
make install
popd
./autogen.sh
./configure --prefix="$WORK" --enable-static --disable-shared
make clean
make -j$(nproc)
make install
$CXX $CXXFLAGS $SRC/vorbis/contrib/oss-fuzz/decode_fuzzer.cc -o $OUT/decode_fuzzer -L"$WORK/lib" -I"$WORK/include" -lFuzzingEngine -lvorbisfile -lvorbis -logg
#include <stdio.h>
#include <string.h>
#include <cstdint>
#include <vorbis/vorbisfile.h>
struct vorbis_data {
const uint8_t *current;
const uint8_t *data;
size_t size;
};
size_t read_func(void *ptr, size_t size1, size_t size2, void *datasource) {
vorbis_data* vd = (vorbis_data *)(datasource);
size_t len = size1 * size2;
if (vd->current + len > vd->data + vd->size) {
len = vd->data + vd->size - vd->current;
}
memcpy(ptr, vd->current, len);
vd->current += len;
return len;
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
ov_callbacks memory_callbacks = {0};
memory_callbacks.read_func = read_func;
vorbis_data data_st;
data_st.size = Size;
data_st.current = Data;
data_st.data = Data;
OggVorbis_File vf;
int result = ov_open_callbacks(&data_st, &vf, NULL, 0, memory_callbacks);
if (result < 0) {
return 0;
}
int current_section = 0;
int eof = 0;
char buf[4096];
int read_result;
while (!eof) {
read_result = ov_read(&vf, buf, sizeof(buf), 0, 2, 1, &current_section);
if (read_result != OV_HOLE && read_result <= 0) {
eof = 1;
}
}
ov_clear(&vf);
return 0;
}
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