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avcodec/proresdec2: decode picture header before frame allocation 

Fixes: Timeout (21sec -> 0.3sec)
Fixes: 13716/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PRORES_fuzzer-5755593333145600

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-03-24 20:04:12 +01:00
parent 4f5e660e69
commit 468ae6a734
1 changed files with 4 additions and 3 deletions
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7
libavcodec/proresdec2.c
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@ -778,9 +778,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
buf += frame_hdr_size;
buf_size -= frame_hdr_size;
if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
return ret;
decode_picture:
pic_size = decode_picture_header(avctx, buf, buf_size);
if (pic_size < 0) {
@ -788,6 +785,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
return pic_size;
}
if (ctx->first_field)
if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
return ret;
if ((ret = decode_picture(avctx)) < 0) {
av_log(avctx, AV_LOG_ERROR, "error decoding picture\n");
return ret;