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/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Janne Grunau
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <errno.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <dav1d/dav1d.h>
#include "src/cpu.h"
#include "dav1d_fuzzer.h"
#ifdef DAV1D_ALLOC_FAIL
#include "alloc_fail.h"
static unsigned djb_xor(const uint8_t * c, size_t len) {
unsigned hash = 5381;
for(size_t i = 0; i < len; i++)
hash = hash * 33 ^ c[i];
return hash;
}
#endif
static unsigned r32le(const uint8_t *const p) {
return ((uint32_t)p[3] << 24U) | (p[2] << 16U) | (p[1] << 8U) | p[0];
}
#define DAV1D_FUZZ_MAX_SIZE 4096 * 4096
// search for "--cpumask xxx" in argv and remove both parameters
int LLVMFuzzerInitialize(int *argc, char ***argv) {
int i = 1;
for (; i < *argc; i++) {
if (!strcmp((*argv)[i], "--cpumask")) {
const char * cpumask = (*argv)[i+1];
if (cpumask) {
char *end;
unsigned res;
if (!strncmp(cpumask, "0x", 2)) {
cpumask += 2;
res = (unsigned) strtoul(cpumask, &end, 16);
} else {
res = (unsigned) strtoul(cpumask, &end, 0);
}
if (end != cpumask && !end[0]) {
dav1d_set_cpu_flags_mask(res);
}
}
break;
}
}
for (; i < *argc - 2; i++) {
(*argv)[i] = (*argv)[i + 2];
}
*argc = i;
return 0;
}
// expects ivf input
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
{
Dav1dSettings settings = { 0 };
Dav1dContext * ctx = NULL;
Dav1dPicture pic;
const uint8_t *ptr = data;
int have_seq_hdr = 0;
int err;
dav1d_version();
if (size < 32) goto end;
#ifdef DAV1D_ALLOC_FAIL
unsigned h = djb_xor(ptr, 32);
unsigned seed = h;
unsigned probability = h > (RAND_MAX >> 5) ? RAND_MAX >> 5 : h;
int max_frame_delay = (h & 0xf) + 1;
int n_threads = ((h >> 4) & 0x7) + 1;
if (max_frame_delay > 5) max_frame_delay = 1;
if (n_threads > 3) n_threads = 1;
#endif
ptr += 32; // skip ivf header
dav1d_default_settings(&settings);
#ifdef DAV1D_MT_FUZZING
settings.max_frame_delay = settings.n_threads = 4;
#elif defined(DAV1D_ALLOC_FAIL)
settings.max_frame_delay = max_frame_delay;
settings.n_threads = n_threads;
dav1d_setup_alloc_fail(seed, probability);
#else
settings.max_frame_delay = settings.n_threads = 1;
#endif
#if defined(DAV1D_FUZZ_MAX_SIZE)
settings.frame_size_limit = DAV1D_FUZZ_MAX_SIZE;
#endif
err = dav1d_open(&ctx, &settings);
if (err < 0) goto end;
while (ptr <= data + size - 12) {
Dav1dData buf;
uint8_t *p;
size_t frame_size = r32le(ptr);
ptr += 12;
if (frame_size > size || ptr > data + size - frame_size)
break;
if (!frame_size) continue;
if (!have_seq_hdr) {
Dav1dSequenceHeader seq;
int err = dav1d_parse_sequence_header(&seq, ptr, frame_size);
// skip frames until we see a sequence header
if (err != 0) {
ptr += frame_size;
continue;
}
have_seq_hdr = 1;
}
// copy frame data to a new buffer to catch reads past the end of input
p = dav1d_data_create(&buf, frame_size);
if (!p) goto cleanup;
memcpy(p, ptr, frame_size);
ptr += frame_size;
do {
if ((err = dav1d_send_data(ctx, &buf)) < 0) {
if (err != DAV1D_ERR(EAGAIN))
break;
}
memset(&pic, 0, sizeof(pic));
err = dav1d_get_picture(ctx, &pic);
if (err == 0) {
dav1d_picture_unref(&pic);
} else if (err != DAV1D_ERR(EAGAIN)) {
break;
}
} while (buf.sz > 0);
if (buf.sz > 0)
dav1d_data_unref(&buf);
}
memset(&pic, 0, sizeof(pic));
if ((err = dav1d_get_picture(ctx, &pic)) == 0) {
/* Test calling dav1d_picture_unref() after dav1d_close() */
do {
Dav1dPicture pic2 = { 0 };
if ((err = dav1d_get_picture(ctx, &pic2)) == 0)
dav1d_picture_unref(&pic2);
} while (err != DAV1D_ERR(EAGAIN));
dav1d_close(&ctx);
dav1d_picture_unref(&pic);
return 0;
}
cleanup:
dav1d_close(&ctx);
end:
return 0;
}