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avcodec/ac3dec: Use frame_size if superframe_size is 0 

Fixes: Infinite loop
Fixes: 7669/clusterfuzz-testcase-ffmpeg_AV_CODEC_ID_AC3_FIXED_fuzzer-4689042185650176
Fixes: 7670/clusterfuzz-testcase-ffmpeg_AV_CODEC_ID_AC3_fuzzer-4706306762997760
Fixes: 7672/clusterfuzz-testcase-ffmpeg_AV_CODEC_ID_EAC3_fuzzer-4702108499574784

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 2018-05-18 01:48:38 +02:00
parent 085fe9822d
commit f77eee67e2
1 changed files with 3 additions and 0 deletions
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3
libavcodec/ac3dec.c
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@ -1800,6 +1800,9 @@ dependent_frame:
*got_frame_ptr = 1;
if (!s->superframe_size)
return FFMIN(full_buf_size, s->frame_size);
return FFMIN(full_buf_size, s->superframe_size);
}