mirror of https://git.ffmpeg.org/ffmpeg.git
tools: add target_enc_fuzzer.c
Sponsored-by: Sovereign Tech Fund Reviewed-by: James Almer <jamrial@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
parent
61f27e5f71
commit
fb4a1eaadf
3
Makefile
3
Makefile
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@ -52,6 +52,9 @@ $(TOOLS): %$(EXESUF): %.o
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target_dec_%_fuzzer$(EXESUF): target_dec_%_fuzzer.o $(FF_DEP_LIBS)
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$(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)
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target_enc_%_fuzzer$(EXESUF): target_enc_%_fuzzer.o $(FF_DEP_LIBS)
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$(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)
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tools/target_bsf_%_fuzzer$(EXESUF): tools/target_bsf_%_fuzzer.o $(FF_DEP_LIBS)
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$(LD) $(LDFLAGS) $(LDEXEFLAGS) $(LD_O) $^ $(ELIBS) $(FF_EXTRALIBS) $(LIBFUZZER_PATH)
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@ -5,6 +5,9 @@ TOOLS-$(CONFIG_ZLIB) += cws2fws
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tools/target_dec_%_fuzzer.o: tools/target_dec_fuzzer.c
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$(COMPILE_C) -DFFMPEG_DECODER=$*
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tools/target_enc_%_fuzzer.o: tools/target_enc_fuzzer.c
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$(COMPILE_C) -DFFMPEG_ENCODER=$*
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tools/target_bsf_%_fuzzer.o: tools/target_bsf_fuzzer.c
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$(COMPILE_C) -DFFMPEG_BSF=$*
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@ -0,0 +1,203 @@
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/*
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* Copyright (c) 2024 Michael Niedermayer <michael-ffmpeg@niedermayer.cc>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Based on target_dec_fuzzer
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*/
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#include "config.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/cpu.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "libavcodec/avcodec.h"
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#include "libavcodec/bytestream.h"
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#include "libavcodec/codec_internal.h"
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#include "libavformat/avformat.h"
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
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extern const FFCodec * codec_list[];
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static void error(const char *err)
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{
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fprintf(stderr, "%s", err);
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exit(1);
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}
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static const FFCodec *c = NULL;
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// Ensure we don't loop forever
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const uint32_t maxiteration = 8096;
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static int encode(AVCodecContext *enc_ctx, AVFrame *frame, AVPacket *pkt)
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{
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int ret;
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ret = avcodec_send_frame(enc_ctx, frame);
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if (ret < 0)
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return ret;
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while (ret >= 0) {
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ret = avcodec_receive_packet(enc_ctx, pkt);
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if (ret == AVERROR(EAGAIN)) {
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return 0;
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} else if (ret < 0) {
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return ret;
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}
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av_packet_unref(pkt);
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}
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av_assert0(0);
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}
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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uint64_t maxpixels_per_frame = 512 * 512;
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uint64_t maxpixels;
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const uint8_t *end = data + size;
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uint32_t it = 0;
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uint64_t nb_samples = 0;
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AVDictionary *opts = NULL;
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if (!c) {
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#define ENCODER_SYMBOL0(CODEC) ff_##CODEC##_encoder
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#define ENCODER_SYMBOL(CODEC) ENCODER_SYMBOL0(CODEC)
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extern FFCodec ENCODER_SYMBOL(FFMPEG_ENCODER);
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codec_list[0] = &ENCODER_SYMBOL(FFMPEG_ENCODER);
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c = &ENCODER_SYMBOL(FFMPEG_ENCODER);
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av_log_set_level(AV_LOG_PANIC);
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}
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av_assert0(c->p.type == AVMEDIA_TYPE_VIDEO);
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maxpixels = maxpixels_per_frame * maxiteration;
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maxpixels_per_frame = FFMIN(maxpixels_per_frame , maxpixels);
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AVCodecContext* ctx = avcodec_alloc_context3(&c->p);
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if (!ctx)
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error("Failed memory allocation");
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if (ctx->max_pixels == 0 || ctx->max_pixels > maxpixels_per_frame)
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ctx->max_pixels = maxpixels_per_frame; //To reduce false positive OOM and hangs
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ctx->pix_fmt = AV_PIX_FMT_YUV420P;
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if (size > 1024) {
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GetByteContext gbc;
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int flags;
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int64_t flags64;
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size -= 1024;
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bytestream2_init(&gbc, data + size, 1024);
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ctx->width = bytestream2_get_le32(&gbc) & 0xFFFF;
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ctx->height = bytestream2_get_le32(&gbc) & 0xFFFF;
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ctx->bit_rate = bytestream2_get_le64(&gbc);
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ctx->gop_size = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
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ctx->max_b_frames = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
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ctx->time_base.num = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
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ctx->time_base.den = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
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ctx->framerate.num = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
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ctx->framerate.den = bytestream2_get_le32(&gbc) & 0x7FFFFFFF;
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flags = bytestream2_get_byte(&gbc);
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if (flags & 2)
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ctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
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if (flags & 0x40)
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av_force_cpu_flags(0);
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flags64 = bytestream2_get_le64(&gbc);
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int npixfmts = 0;
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while (c->p.pix_fmts[npixfmts++] != AV_PIX_FMT_NONE)
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;
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ctx->pix_fmt = c->p.pix_fmts[bytestream2_get_byte(&gbc) % npixfmts];
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switch (c->p.id) {
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case AV_CODEC_ID_FFV1:{
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int coder = bytestream2_get_byte(&gbc)&3;
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if (coder == 3) coder = -2;
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av_dict_set_int(&opts, "coder", coder, 0);
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av_dict_set_int(&opts, "context", bytestream2_get_byte(&gbc)&1, 0);
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av_dict_set_int(&opts, "slicecrc", bytestream2_get_byte(&gbc)&1, 0);
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break;}
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}
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}
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if (ctx->width == 0 || av_image_check_size(ctx->width, ctx->height, 0, ctx))
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ctx->width = ctx->height = 64;
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int res = avcodec_open2(ctx, &c->p, &opts);
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if (res < 0) {
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avcodec_free_context(&ctx);
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av_dict_free(&opts);
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return 0; // Failure of avcodec_open2() does not imply that a issue was found
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}
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AVFrame *frame = av_frame_alloc();
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AVPacket *avpkt = av_packet_alloc();
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if (!frame || !avpkt)
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error("Failed memory allocation");
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frame->format = ctx->pix_fmt;
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frame->width = ctx->width;
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frame->height = ctx->height;
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while (data < end && it < maxiteration) {
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res = av_frame_get_buffer(frame, 0);
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if (res < 0)
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error("Failed av_frame_get_buffer");
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for (int i=0; i<FF_ARRAY_ELEMS(frame->buf); i++) {
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if (frame->buf[i]) {
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int buf_size = FFMIN(end-data, frame->buf[i]->size);
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memcpy(frame->buf[i]->data, data, buf_size);
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memset(frame->buf[i]->data + buf_size, 0, frame->buf[i]->size - buf_size);
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data += buf_size;
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}
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}
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frame->pts = nb_samples;
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res = encode(ctx, frame, avpkt);
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if (res < 0)
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break;
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it++;
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for (int i=0; i<FF_ARRAY_ELEMS(frame->buf); i++)
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av_buffer_unref(&frame->buf[i]);
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av_packet_unref(avpkt);
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}
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encode(ctx, NULL, avpkt);
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av_packet_unref(avpkt);
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// fprintf(stderr, "frames encoded: %"PRId64", iterations: %d\n", nb_samples , it);
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av_frame_free(&frame);
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avcodec_free_context(&ctx);
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av_packet_free(&avpkt);
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av_dict_free(&opts);
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return 0;
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}
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