[FFmpeg-cvslog] avcodec/aacdec: Check if we run out of input in read_stream_mux_config()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sun Sep  8 21:08:31 2019 +0200| [3dce4d03d5a555bff2e11f97fb54701b22effeaf] | committer: Michael Niedermayer

avcodec/aacdec: Check if we run out of input in read_stream_mux_config()

Fixes: Infinite loop
Fixes: 16920/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_LATM_fuzzer-5653421289373696

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3dce4d03d5a555bff2e11f97fb54701b22effeaf
---

 libavcodec/aacdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 98b6e58be3..d17852d8ba 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -409,6 +409,8 @@ static int read_stream_mux_config(struct LATMContext *latmctx,
             } else {
                 int esc;
                 do {
+                    if (get_bits_left(gb) < 9)
+                        return AVERROR_INVALIDDATA;
                     esc = get_bits(gb, 1);
                     skip_bits(gb, 8);
                 } while (esc);