videolan
/
ffmpeg
mirror of https://git.videolan.org/git/ffmpeg.git
1
Fork 0
Code Releases Activity

tools/target_dec_fuzzer: use av_packet_alloc() to allocate packets 

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2021-01-31 13:18:01 -03:00
parent 32582a4e2a
commit 08dbcaa57a
1 changed files with 36 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

73
tools/target_dec_fuzzer.c
View File

@ -295,13 +295,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
int got_frame;
AVFrame *frame = av_frame_alloc();
if (!frame)
AVPacket *avpkt = av_packet_alloc();
AVPacket *parsepkt = av_packet_alloc();
if (!frame || !avpkt || !parsepkt)
error("Failed memory allocation");
// Read very simple container
AVPacket avpkt, parsepkt;
av_init_packet(&avpkt);
av_init_packet(&parsepkt);
while (data < end && it < maxiteration) {
// Search for the TAG
while (data + sizeof(fuzz_tag) < end) {
@ -312,43 +311,42 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (data + sizeof(fuzz_tag) > end)
data = end;
res = av_new_packet(&parsepkt, data - last);
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;
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) {
while (parsepkt->size > 0) {
int decode_more;
if (parser) {
av_init_packet(&avpkt);
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)
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)
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;
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;
avpkt->flags |= AV_PKT_FLAG_KEY;
avpkt->flags |= parsepkt->flags & AV_PKT_FLAG_DISCARD;
} else {
av_packet_move_ref(&avpkt, &parsepkt);
av_packet_move_ref(avpkt, parsepkt);
}
if (!(flushpattern & 7))
@ -356,7 +354,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
flushpattern = (flushpattern >> 3) + (flushpattern << 61);
if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE) {
int ret = avcodec_send_packet(ctx, &avpkt);
int ret = avcodec_send_packet(ctx, avpkt);
decode_more = ret >= 0;
if(!decode_more) {
ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
@ -371,7 +369,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
// Iterate through all data
while (decode_more && it++ < maxiteration) {
av_frame_unref(frame);
int ret = decode_handler(ctx, frame, &got_frame, &avpkt);
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)
@ -381,30 +379,30 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
if (ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
frame->nb_samples == 0 && !got_frame &&
(avpkt.flags & AV_PKT_FLAG_DISCARD))
(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)
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;
avpkt->data += ret;
avpkt->size -= ret;
decode_more = avpkt->size > 0;
} else
decode_more = ret >= 0;
}
av_packet_unref(&avpkt);
av_packet_unref(avpkt);
}
av_packet_unref(&parsepkt);
av_packet_unref(parsepkt);
}
maximums_reached:
av_packet_unref(&avpkt);
av_packet_unref(avpkt);
if (ctx->codec_type != AVMEDIA_TYPE_SUBTITLE)
avcodec_send_packet(ctx, NULL);
@ -412,7 +410,7 @@ maximums_reached:
do {
got_frame = 0;
av_frame_unref(frame);
decode_handler(ctx, frame, &got_frame, &avpkt);
decode_handler(ctx, frame, &got_frame, avpkt);
} while (got_frame == 1 && it++ < maxiteration);
fprintf(stderr, "pixels decoded: %"PRId64", samples decoded: %"PRId64", iterations: %d\n", ec_pixels, nb_samples, it);
@ -421,7 +419,8 @@ maximums_reached:
avcodec_free_context(&ctx);
avcodec_free_context(&parser_avctx);
av_parser_close(parser);
av_packet_unref(&parsepkt);
av_packet_free(&avpkt);
av_packet_free(&parsepkt);
av_dict_free(&opts);
return 0;
}