[FFmpeg-cvslog] avcodec/mpegaudio_parser: Consume more than 0 bytes in case of the unsupported mp3adu case

[Michael Niedermayer]

ffmpeg | branch: release/4.0 | Michael Niedermayer <michael at niedermayer.cc> | Sun Oct 28 21:08:39 2018 +0100| [9664c3a4d40edb77d8e0b7a8b490a5b0d4843e50] | committer: Michael Niedermayer

avcodec/mpegaudio_parser: Consume more than 0 bytes in case of the unsupported mp3adu case

Fixes: Timeout
Fixes: 10966/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MP3ADU_fuzzer-5348695024336896
Fixes: 10969/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MP3ADUFLOAT_fuzzer-5691669402877952

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit df91af140c5543cfbbed187f696e79b554d2c135)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9664c3a4d40edb77d8e0b7a8b490a5b0d4843e50
---

 libavcodec/mpegaudio_parser.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mpegaudio_parser.c b/libavcodec/mpegaudio_parser.c
index a109f12701..1005e89aae 100644
--- a/libavcodec/mpegaudio_parser.c
+++ b/libavcodec/mpegaudio_parser.c
@@ -101,7 +101,7 @@ static int mpegaudio_parse(AVCodecParserContext *s1,
                             "MP3ADU full parser");
                         *poutbuf = NULL;
                         *poutbuf_size = 0;
-                        return 0; /* parsers must not return error codes */
+                        return buf_size; /* parsers must not return error codes */
                     }
 
                     break;