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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 <dav1d/dav1d.h>
#include "src/cpu.h"
#include "dav1d_fuzzer.h"
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
#if defined(DAV1D_FUZZ_MAX_SIZE)
static int (*default_picture_allocator)(Dav1dPicture *, void *);
static int fuzz_picture_allocator(Dav1dPicture *pic, void *cookie) {
if (pic->p.w > DAV1D_FUZZ_MAX_SIZE || pic->p.h > DAV1D_FUZZ_MAX_SIZE)
return -EINVAL;
return default_picture_allocator(pic, cookie);
}
#endif
// 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 err;
dav1d_version();
// memory sanitizer is inherently incompatible with asm
#if defined(__has_feature)
#if __has_feature(memory_sanitizer)
dav1d_set_cpu_flags_mask(0);
#endif
#endif
if (size < 32) goto end;
ptr += 32; // skip ivf header
dav1d_default_settings(&settings);
#ifdef DAV1D_MT_FUZZING
settings.n_frame_threads = settings.n_tile_threads = 2;
#else
settings.n_frame_threads = settings.n_tile_threads = 1;
#endif
#if defined(DAV1D_FUZZ_MAX_SIZE)
default_picture_allocator = settings.allocator.alloc_picture_callback;
settings.allocator.alloc_picture_callback = fuzz_picture_allocator;
#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;
// 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 != -EAGAIN)
break;
}
memset(&pic, 0, sizeof(pic));
err = dav1d_get_picture(ctx, &pic);
if (err == 0) {
dav1d_picture_unref(&pic);
} else if (err != -EAGAIN) {
break;
}
} while (buf.sz > 0);
if (buf.sz > 0)
dav1d_data_unref(&buf);
}
do {
memset(&pic, 0, sizeof(pic));
err = dav1d_get_picture(ctx, &pic);
if (err == 0)
dav1d_picture_unref(&pic);
} while (err != -EAGAIN);
cleanup:
dav1d_flush(ctx);
dav1d_close(&ctx);
end:
return 0;
}
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