mirror of https://git.ffmpeg.org/ffmpeg.git
620 lines
26 KiB
C
620 lines
26 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/* Targeted fuzzer that targets specific codecs depending on two
|
|
compile-time flags.
|
|
INSTRUCTIONS:
|
|
|
|
* Get the very fresh clang, e.g. see http://libfuzzer.info#versions
|
|
* Get and build libFuzzer:
|
|
svn co http://llvm.org/svn/llvm-project/llvm/trunk/lib/Fuzzer
|
|
./Fuzzer/build.sh
|
|
* build ffmpeg for fuzzing:
|
|
FLAGS="-fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp -g" CC="clang $FLAGS" CXX="clang++ $FLAGS" ./configure --disable-x86asm
|
|
make clean && make -j
|
|
* build the fuzz target.
|
|
Choose the value of FFMPEG_CODEC (e.g. AV_CODEC_ID_DVD_SUBTITLE) and
|
|
choose one of FUZZ_FFMPEG_VIDEO, FUZZ_FFMPEG_AUDIO, FUZZ_FFMPEG_SUBTITLE.
|
|
clang -fsanitize=address -fsanitize-coverage=trace-pc-guard,trace-cmp tools/target_dec_fuzzer.c -o target_dec_fuzzer -I. -DFFMPEG_CODEC=AV_CODEC_ID_MPEG1VIDEO -DFUZZ_FFMPEG_VIDEO ../../libfuzzer/libFuzzer.a -Llibavcodec -Llibavdevice -Llibavfilter -Llibavformat -Llibavutil -Llibpostproc -Llibswscale -Llibswresample -Wl,--as-needed -Wl,-z,noexecstack -Wl,--warn-common -Wl,-rpath-link=:libpostproc:libswresample:libswscale:libavfilter:libavdevice:libavformat:libavcodec:libavutil -lavdevice -lavfilter -lavformat -lavcodec -lswresample -lswscale -lavutil -ldl -lxcb -lxcb-shm -lxcb -lxcb-xfixes -lxcb -lxcb-shape -lxcb -lX11 -lasound -lm -lbz2 -lz -pthread
|
|
* create a corpus directory and put some samples there (empty dir is ok too):
|
|
mkdir CORPUS && cp some-files CORPUS
|
|
|
|
* Run fuzzing:
|
|
./target_dec_fuzzer -max_len=100000 CORPUS
|
|
|
|
More info:
|
|
http://libfuzzer.info
|
|
http://tutorial.libfuzzer.info
|
|
https://github.com/google/oss-fuzz
|
|
http://lcamtuf.coredump.cx/afl/
|
|
https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "libavutil/avassert.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/cpu.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/mem.h"
|
|
|
|
#include "libavcodec/avcodec.h"
|
|
#include "libavcodec/bytestream.h"
|
|
#include "libavcodec/codec_internal.h"
|
|
#include "libavformat/avformat.h"
|
|
|
|
//For FF_SANE_NB_CHANNELS, so we dont waste energy testing things that will get instantly rejected
|
|
#include "libavcodec/internal.h"
|
|
|
|
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
|
|
|
|
extern const FFCodec * codec_list[];
|
|
|
|
static void error(const char *err)
|
|
{
|
|
fprintf(stderr, "%s", err);
|
|
exit(1);
|
|
}
|
|
|
|
static const FFCodec *c = NULL;
|
|
static const FFCodec *AVCodecInitialize(enum AVCodecID codec_id)
|
|
{
|
|
const AVCodec *res;
|
|
|
|
res = avcodec_find_decoder(codec_id);
|
|
if (!res)
|
|
error("Failed to find decoder");
|
|
return ffcodec(res);
|
|
}
|
|
|
|
static int subtitle_handler(AVCodecContext *avctx, AVFrame *unused,
|
|
int *got_sub_ptr, const AVPacket *avpkt)
|
|
{
|
|
AVSubtitle sub;
|
|
int ret = avcodec_decode_subtitle2(avctx, &sub, got_sub_ptr, avpkt);
|
|
if (ret >= 0 && *got_sub_ptr)
|
|
avsubtitle_free(&sub);
|
|
return ret;
|
|
}
|
|
|
|
static int audio_video_handler(AVCodecContext *avctx, AVFrame *frame,
|
|
int *got_frame, const AVPacket *dummy)
|
|
{
|
|
int ret = avcodec_receive_frame(avctx, frame);
|
|
*got_frame = ret >= 0;
|
|
return ret;
|
|
}
|
|
|
|
// Ensure we don't loop forever
|
|
const uint32_t maxiteration = 8096;
|
|
|
|
static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL;
|
|
|
|
static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
|
|
{
|
|
ptrdiff_t linesize1[4];
|
|
size_t size[4];
|
|
int linesize_align[AV_NUM_DATA_POINTERS];
|
|
int i, ret, w = frame->width, h = frame->height;
|
|
|
|
avcodec_align_dimensions2(ctx, &w, &h, linesize_align);
|
|
ret = av_image_fill_linesizes(frame->linesize, ctx->pix_fmt, w);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < 4 && frame->linesize[i]; i++)
|
|
linesize1[i] = frame->linesize[i] =
|
|
FFALIGN(frame->linesize[i], linesize_align[i]);
|
|
for (; i < 4; i++)
|
|
linesize1[i] = 0;
|
|
|
|
ret = av_image_fill_plane_sizes(size, ctx->pix_fmt, h, linesize1);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
frame->extended_data = frame->data;
|
|
for (i = 0; i < 4 && size[i]; i++) {
|
|
switch(ctx->codec_id) {
|
|
case AV_CODEC_ID_FFV1:
|
|
frame->buf[i] = av_buffer_alloc(size[i]);
|
|
break;
|
|
default:
|
|
frame->buf[i] = av_buffer_allocz(size[i]);
|
|
}
|
|
|
|
if (!frame->buf[i])
|
|
goto fail;
|
|
frame->data[i] = frame->buf[i]->data;
|
|
}
|
|
for (; i < AV_NUM_DATA_POINTERS; i++) {
|
|
frame->data[i] = NULL;
|
|
frame->linesize[i] = 0;
|
|
}
|
|
|
|
return 0;
|
|
fail:
|
|
av_frame_unref(frame);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
static int fuzz_get_buffer2(AVCodecContext *ctx, AVFrame *frame, int flags)
|
|
{
|
|
switch (ctx->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
return (ctx->codec->capabilities & AV_CODEC_CAP_DR1)
|
|
? fuzz_video_get_buffer(ctx, frame)
|
|
: avcodec_default_get_buffer2(ctx, frame, flags);
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
return avcodec_default_get_buffer2(ctx, frame, flags);
|
|
default:
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
|
|
int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
|
|
uint64_t maxpixels_per_frame = 4096 * 4096;
|
|
uint64_t maxpixels;
|
|
|
|
uint64_t maxsamples_per_frame = 256*1024*32;
|
|
uint64_t maxsamples;
|
|
const uint64_t fuzz_tag = FUZZ_TAG;
|
|
const uint8_t *last = data;
|
|
const uint8_t *end = data + size;
|
|
uint32_t it = 0;
|
|
uint64_t ec_pixels = 0;
|
|
uint64_t nb_samples = 0;
|
|
int (*decode_handler)(AVCodecContext *avctx, AVFrame *picture,
|
|
int *got_picture_ptr,
|
|
const AVPacket *avpkt) = NULL;
|
|
AVCodecParserContext *parser = NULL;
|
|
uint64_t keyframes = 0;
|
|
uint64_t flushpattern = -1;
|
|
AVDictionary *opts = NULL;
|
|
|
|
if (!c) {
|
|
#ifdef FFMPEG_DECODER
|
|
#define DECODER_SYMBOL0(CODEC) ff_##CODEC##_decoder
|
|
#define DECODER_SYMBOL(CODEC) DECODER_SYMBOL0(CODEC)
|
|
extern FFCodec DECODER_SYMBOL(FFMPEG_DECODER);
|
|
codec_list[0] = &DECODER_SYMBOL(FFMPEG_DECODER);
|
|
|
|
#if FFMPEG_DECODER == tiff || FFMPEG_DECODER == tdsc
|
|
extern FFCodec DECODER_SYMBOL(mjpeg);
|
|
codec_list[1] = &DECODER_SYMBOL(mjpeg);
|
|
#endif
|
|
|
|
c = &DECODER_SYMBOL(FFMPEG_DECODER);
|
|
#else
|
|
c = AVCodecInitialize(FFMPEG_CODEC); // Done once.
|
|
#endif
|
|
av_log_set_level(AV_LOG_PANIC);
|
|
}
|
|
|
|
switch (c->p.type) {
|
|
case AVMEDIA_TYPE_AUDIO :
|
|
case AVMEDIA_TYPE_VIDEO : decode_handler = audio_video_handler ; break;
|
|
case AVMEDIA_TYPE_SUBTITLE: decode_handler = subtitle_handler ; break;
|
|
}
|
|
switch (c->p.id) {
|
|
case AV_CODEC_ID_APE: maxsamples_per_frame /= 256; break;
|
|
}
|
|
maxpixels = maxpixels_per_frame * maxiteration;
|
|
maxsamples = maxsamples_per_frame * maxiteration;
|
|
switch (c->p.id) {
|
|
case AV_CODEC_ID_AASC: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_AGM: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_ANM: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_APE: maxsamples /= 16384; break;
|
|
case AV_CODEC_ID_ARBC: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_ARGO: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_BETHSOFTVID: maxpixels /= 8192; break;
|
|
case AV_CODEC_ID_BINKVIDEO: maxpixels /= 32; break;
|
|
case AV_CODEC_ID_BONK: maxsamples /= 1<<20; break;
|
|
case AV_CODEC_ID_CDTOONS: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_CFHD: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_CINEPAK: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_COOK: maxsamples /= 1<<20; break;
|
|
case AV_CODEC_ID_CSCD: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_DFA: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_DIRAC: maxpixels /= 8192; break;
|
|
case AV_CODEC_ID_DSICINVIDEO: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_DST: maxsamples /= 1<<20; break;
|
|
case AV_CODEC_ID_DVB_SUBTITLE: av_dict_set_int(&opts, "compute_clut", -2, 0); break;
|
|
case AV_CODEC_ID_DXA: maxpixels /= 32; break;
|
|
case AV_CODEC_ID_DXV: maxpixels /= 32; break;
|
|
case AV_CODEC_ID_EXR: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_FFV1: maxpixels /= 32; break;
|
|
case AV_CODEC_ID_FFWAVESYNTH: maxsamples /= 16384; break;
|
|
case AV_CODEC_ID_FLAC: maxsamples /= 1024; break;
|
|
case AV_CODEC_ID_FLIC: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_FLV1: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_FMVC: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_G2M: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_GEM: maxpixels /= 512; break;
|
|
case AV_CODEC_ID_GDV: maxpixels /= 512; break;
|
|
case AV_CODEC_ID_GIF: maxpixels /= 16; break;
|
|
case AV_CODEC_ID_H264: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_HAP: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_HEVC: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_HNM4_VIDEO: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_HQ_HQA: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_IFF_ILBM: maxpixels /= 4096; break;
|
|
case AV_CODEC_ID_INDEO4: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384; break;
|
|
case AV_CODEC_ID_JPEG2000: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_LAGARITH: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_LOCO: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_VORBIS: maxsamples /= 1024; break;
|
|
case AV_CODEC_ID_LSCR: maxpixels /= 16; break;
|
|
case AV_CODEC_ID_MMVIDEO: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_MOTIONPIXELS:maxpixels /= 256; break;
|
|
case AV_CODEC_ID_MP4ALS: maxsamples /= 65536; break;
|
|
case AV_CODEC_ID_MSA1: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_MSRLE: maxpixels /= 16; break;
|
|
case AV_CODEC_ID_MSS2: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_MSZH: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_MTS2: maxpixels /= 4096; break;
|
|
case AV_CODEC_ID_MV30: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_MVC2: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_MVHA: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_MVDV: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_MWSC: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_MXPEG: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_NUV: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_OPUS: maxsamples /= 16384; break;
|
|
case AV_CODEC_ID_PNG: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_APNG: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_QTRLE: maxpixels /= 16; break;
|
|
case AV_CODEC_ID_PAF_VIDEO: maxpixels /= 16; break;
|
|
case AV_CODEC_ID_PRORES: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_QPEG: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_RKA: maxsamples /= 1<<20; break;
|
|
case AV_CODEC_ID_RSCC: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_RASC: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_RTV1: maxpixels /= 16; break;
|
|
case AV_CODEC_ID_RV30: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_SANM: maxpixels /= 16; break;
|
|
case AV_CODEC_ID_SCPR: maxpixels /= 32; break;
|
|
case AV_CODEC_ID_SCREENPRESSO:maxpixels /= 64; break;
|
|
case AV_CODEC_ID_SIMBIOSIS_IMX:maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_SPEEX: maxsamples /= 128; break;
|
|
case AV_CODEC_ID_SMACKAUDIO: maxsamples /= 4096; break;
|
|
case AV_CODEC_ID_SMACKVIDEO: maxpixels /= 64; break;
|
|
case AV_CODEC_ID_SNOW: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_SRGC: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_TARGA: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_TAK: maxsamples /= 1024; break;
|
|
case AV_CODEC_ID_TGV: maxpixels /= 32; break;
|
|
case AV_CODEC_ID_THEORA: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_TQI: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_TRUEMOTION2: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_TSCC: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_UTVIDEO: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_VB: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_VC1: maxpixels /= 8192; break;
|
|
case AV_CODEC_ID_VC1IMAGE: maxpixels /= 8192; break;
|
|
case AV_CODEC_ID_VMNC: maxpixels /= 8192; break;
|
|
case AV_CODEC_ID_VMDVIDEO: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_VMIX: maxpixels /= 8192; break;
|
|
case AV_CODEC_ID_VP3: maxpixels /= 4096; break;
|
|
case AV_CODEC_ID_VP4: maxpixels /= 4096; break;
|
|
case AV_CODEC_ID_VP5: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_VP6F: maxpixels /= 4096; break;
|
|
case AV_CODEC_ID_VP6A: maxpixels /= 4096; break;
|
|
case AV_CODEC_ID_VP7: maxpixels /= 256; break;
|
|
case AV_CODEC_ID_VP9: maxpixels /= 4096; break;
|
|
case AV_CODEC_ID_WAVPACK: maxsamples /= 1024; break;
|
|
case AV_CODEC_ID_WCMV: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_WMV3IMAGE: maxpixels /= 8192; break;
|
|
case AV_CODEC_ID_WMV2: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_WMV3: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_WS_VQA: maxpixels /= 16384; break;
|
|
case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024; break;
|
|
case AV_CODEC_ID_WMAPRO: maxsamples /= 16384; break;
|
|
case AV_CODEC_ID_YLC: maxpixels /= 1024; break;
|
|
case AV_CODEC_ID_ZEROCODEC: maxpixels /= 128; break;
|
|
case AV_CODEC_ID_ZLIB: maxpixels /= 4096; break;
|
|
}
|
|
|
|
maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);
|
|
maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
|
|
|
|
AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
|
|
AVCodecContext* parser_avctx = avcodec_alloc_context3(NULL);
|
|
if (!ctx || !parser_avctx)
|
|
error("Failed memory allocation");
|
|
|
|
if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
|
|
ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
|
|
|
|
ctx->max_samples = maxsamples_per_frame;
|
|
ctx->get_buffer2 = fuzz_get_buffer2;
|
|
if (c->p.capabilities & AV_CODEC_CAP_EXPERIMENTAL)
|
|
ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
|
|
|
|
if (size > 1024) {
|
|
GetByteContext gbc;
|
|
int extradata_size;
|
|
int flags;
|
|
uint64_t request_channel_layout;
|
|
int64_t flags64;
|
|
|
|
size -= 1024;
|
|
bytestream2_init(&gbc, data + size, 1024);
|
|
ctx->width = bytestream2_get_le32(&gbc);
|
|
ctx->height = bytestream2_get_le32(&gbc);
|
|
ctx->bit_rate = bytestream2_get_le64(&gbc);
|
|
ctx->bits_per_coded_sample = bytestream2_get_le32(&gbc);
|
|
// Try to initialize a parser for this codec, note, this may fail which just means we test without one
|
|
flags = bytestream2_get_byte(&gbc);
|
|
if (flags & 1)
|
|
parser = av_parser_init(c->p.id);
|
|
if (flags & 2)
|
|
ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
|
|
if (flags & 4) {
|
|
ctx->err_recognition = AV_EF_AGGRESSIVE | AV_EF_COMPLIANT | AV_EF_CAREFUL;
|
|
if (flags & 8)
|
|
ctx->err_recognition |= AV_EF_EXPLODE;
|
|
}
|
|
if ((flags & 0x10) && c->p.id != AV_CODEC_ID_H264)
|
|
ctx->flags2 |= AV_CODEC_FLAG2_FAST;
|
|
if (flags & 0x80)
|
|
ctx->export_side_data |= AV_CODEC_EXPORT_DATA_MVS;
|
|
|
|
if (flags & 0x40)
|
|
av_force_cpu_flags(0);
|
|
|
|
extradata_size = bytestream2_get_le32(&gbc);
|
|
|
|
ctx->sample_rate = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
|
|
ctx->ch_layout.nb_channels = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
|
|
ctx->block_align = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
|
|
ctx->codec_tag = bytestream2_get_le32(&gbc);
|
|
if (c->codec_tags) {
|
|
int n;
|
|
for (n = 0; c->codec_tags[n] != FF_CODEC_TAGS_END; n++);
|
|
ctx->codec_tag = c->codec_tags[ctx->codec_tag % n];
|
|
}
|
|
keyframes = bytestream2_get_le64(&gbc);
|
|
request_channel_layout = bytestream2_get_le64(&gbc);
|
|
|
|
ctx->idct_algo = bytestream2_get_byte(&gbc) % 25;
|
|
flushpattern = bytestream2_get_le64(&gbc);
|
|
ctx->skip_frame = bytestream2_get_byte(&gbc) - 254 + AVDISCARD_ALL;
|
|
|
|
|
|
if (flags & 0x20) {
|
|
switch (ctx->codec_id) {
|
|
case AV_CODEC_ID_AC3:
|
|
case AV_CODEC_ID_EAC3:
|
|
av_dict_set_int(&opts, "cons_noisegen", bytestream2_get_byte(&gbc) & 1, 0);
|
|
av_dict_set_int(&opts, "heavy_compr", bytestream2_get_byte(&gbc) & 1, 0);
|
|
av_dict_set_int(&opts, "target_level", (int)(bytestream2_get_byte(&gbc) % 32) - 31, 0);
|
|
av_dict_set_int(&opts, "dmix_mode", (int)(bytestream2_get_byte(&gbc) % 4) - 1, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Keep the deprecated request_channel_layout behavior to ensure old fuzzing failures
|
|
// remain reproducible.
|
|
if (request_channel_layout) {
|
|
switch (ctx->codec_id) {
|
|
case AV_CODEC_ID_AC3:
|
|
case AV_CODEC_ID_EAC3:
|
|
case AV_CODEC_ID_MLP:
|
|
case AV_CODEC_ID_TRUEHD:
|
|
case AV_CODEC_ID_DTS:
|
|
if (request_channel_layout & ~INT64_MIN) {
|
|
char *downmix_layout = av_mallocz(19);
|
|
if (!downmix_layout)
|
|
error("Failed memory allocation");
|
|
av_strlcatf(downmix_layout, 19, "0x%"PRIx64, request_channel_layout & ~INT64_MIN);
|
|
av_dict_set(&opts, "downmix", downmix_layout, AV_DICT_DONT_STRDUP_VAL);
|
|
}
|
|
if (ctx->codec_id != AV_CODEC_ID_DTS)
|
|
break;
|
|
// fall-through
|
|
case AV_CODEC_ID_DOLBY_E:
|
|
av_dict_set_int(&opts, "channel_order", !!(request_channel_layout & INT64_MIN), 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
flags64 = bytestream2_get_le64(&gbc);
|
|
if (flags64 &1)
|
|
ctx->debug |= FF_DEBUG_SKIP;
|
|
if (flags64 &2)
|
|
ctx->debug |= FF_DEBUG_QP;
|
|
if (flags64 &4)
|
|
ctx->debug |= FF_DEBUG_MB_TYPE;
|
|
if (flags64 & 8)
|
|
ctx->export_side_data |= AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS;
|
|
if (flags64 & 0x10)
|
|
ctx->err_recognition |= AV_EF_CRCCHECK;
|
|
|
|
ctx->workaround_bugs = bytestream2_get_le32(&gbc);
|
|
|
|
if (c->p.max_lowres) {
|
|
ctx->lowres = bytestream2_get_byte(&gbc) % (c->p.max_lowres+1);
|
|
}
|
|
|
|
if (extradata_size < size) {
|
|
ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (ctx->extradata) {
|
|
ctx->extradata_size = extradata_size;
|
|
size -= ctx->extradata_size;
|
|
memcpy(ctx->extradata, data + size, ctx->extradata_size);
|
|
}
|
|
}
|
|
if (av_image_check_size(ctx->width, ctx->height, 0, ctx))
|
|
ctx->width = ctx->height = 0;
|
|
}
|
|
|
|
int res = avcodec_open2(ctx, &c->p, &opts);
|
|
if (res < 0) {
|
|
avcodec_free_context(&ctx);
|
|
av_free(parser_avctx);
|
|
av_parser_close(parser);
|
|
av_dict_free(&opts);
|
|
return 0; // Failure of avcodec_open2() does not imply that a issue was found
|
|
}
|
|
parser_avctx->codec_id = ctx->codec_id;
|
|
parser_avctx->extradata_size = ctx->extradata_size;
|
|
parser_avctx->extradata = ctx->extradata ? av_memdup(ctx->extradata, ctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE) : NULL;
|
|
|
|
|
|
int got_frame;
|
|
AVFrame *frame = av_frame_alloc();
|
|
AVPacket *avpkt = av_packet_alloc();
|
|
AVPacket *parsepkt = av_packet_alloc();
|
|
if (!frame || !avpkt || !parsepkt)
|
|
error("Failed memory allocation");
|
|
|
|
// Read very simple container
|
|
while (data < end && it < maxiteration) {
|
|
// Search for the TAG
|
|
while (data + sizeof(fuzz_tag) < end) {
|
|
if (data[0] == (fuzz_tag & 0xFF) && AV_RN64(data) == fuzz_tag)
|
|
break;
|
|
data++;
|
|
}
|
|
if (data + sizeof(fuzz_tag) > end)
|
|
data = end;
|
|
|
|
res = av_new_packet(parsepkt, data - last);
|
|
if (res < 0)
|
|
error("Failed memory allocation");
|
|
memcpy(parsepkt->data, last, data - last);
|
|
parsepkt->flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
|
|
keyframes = (keyframes >> 2) + (keyframes<<62);
|
|
data += sizeof(fuzz_tag);
|
|
last = data;
|
|
|
|
while (parsepkt->size > 0) {
|
|
int decode_more;
|
|
|
|
if (parser) {
|
|
int ret = av_parser_parse2(parser, parser_avctx, &avpkt->data, &avpkt->size,
|
|
parsepkt->data, parsepkt->size,
|
|
parsepkt->pts, parsepkt->dts, parsepkt->pos);
|
|
if (avpkt->data == parsepkt->data) {
|
|
avpkt->buf = av_buffer_ref(parsepkt->buf);
|
|
if (!avpkt->buf)
|
|
error("Failed memory allocation");
|
|
} else {
|
|
if (av_packet_make_refcounted(avpkt) < 0)
|
|
error("Failed memory allocation");
|
|
}
|
|
parsepkt->data += ret;
|
|
parsepkt->size -= ret;
|
|
parsepkt->pos += ret;
|
|
avpkt->pts = parser->pts;
|
|
avpkt->dts = parser->dts;
|
|
avpkt->pos = parser->pos;
|
|
if ( parser->key_frame == 1 ||
|
|
(parser->key_frame == -1 && parser->pict_type == AV_PICTURE_TYPE_I))
|
|
avpkt->flags |= AV_PKT_FLAG_KEY;
|
|
avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
|
|
} else {
|
|
av_packet_move_ref(avpkt, parsepkt);
|
|
}
|
|
|
|
if (!(flushpattern & 7))
|
|
avcodec_flush_buffers(ctx);
|
|
flushpattern = (flushpattern >> 3) + (flushpattern << 61);
|
|
|
|
if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
|
|
int ret = avcodec_send_packet(ctx, avpkt);
|
|
decode_more = ret >= 0;
|
|
if(!decode_more) {
|
|
ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
|
|
if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
|
|
ctx->error_concealment = 0;
|
|
ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
|
|
}
|
|
if (ec_pixels > maxpixels)
|
|
goto maximums_reached;
|
|
}
|
|
} else
|
|
decode_more = 1;
|
|
|
|
// Iterate through all data
|
|
while (decode_more && it++ < maxiteration) {
|
|
av_frame_unref(frame);
|
|
int ret = decode_handler(ctx, frame, &got_frame, avpkt);
|
|
|
|
ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
|
|
if (it > 20 || ec_pixels > 4 * ctx->max_pixels) {
|
|
ctx->error_concealment = 0;
|
|
ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE);
|
|
}
|
|
if (ec_pixels > maxpixels)
|
|
goto maximums_reached;
|
|
|
|
if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
|
|
frame->nb_samples == 0 && !got_frame &&
|
|
(avpkt->flags & AV_PKT_FLAG_DISCARD))
|
|
nb_samples += ctx->max_samples;
|
|
|
|
nb_samples += frame->nb_samples;
|
|
if (nb_samples > maxsamples)
|
|
goto maximums_reached;
|
|
|
|
if (ret <= 0 || ret > avpkt->size)
|
|
break;
|
|
|
|
if (ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
|
|
avpkt->data += ret;
|
|
avpkt->size -= ret;
|
|
decode_more = avpkt->size > 0;
|
|
} else
|
|
decode_more = ret >= 0;
|
|
}
|
|
av_packet_unref(avpkt);
|
|
}
|
|
av_packet_unref(parsepkt);
|
|
}
|
|
maximums_reached:
|
|
|
|
av_packet_unref(avpkt);
|
|
|
|
if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
|
|
avcodec_send_packet(ctx, NULL);
|
|
|
|
do {
|
|
got_frame = 0;
|
|
av_frame_unref(frame);
|
|
decode_handler(ctx, frame, &got_frame, avpkt);
|
|
|
|
nb_samples += frame->nb_samples;
|
|
if (nb_samples > maxsamples)
|
|
break;
|
|
} while (got_frame == 1 && it++ < maxiteration);
|
|
|
|
fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
|
|
|
|
av_frame_free(&frame);
|
|
avcodec_free_context(&ctx);
|
|
avcodec_free_context(&parser_avctx);
|
|
av_parser_close(parser);
|
|
av_packet_free(&avpkt);
|
|
av_packet_free(&parsepkt);
|
|
av_dict_free(&opts);
|
|
return 0;
|
|
}
|