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avcodec/wmavoice: Check remaining input in parse_packet_header() 

Fixes: Infinite loop
Fixes: 18914/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAVOICE_fuzzer-5731902946541568

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 2019-11-23 09:18:12 +01:00
parent 92455c8c65
commit 19c41969b2
1 changed files with 3 additions and 0 deletions
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3
libavcodec/wmavoice.c
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@ -1843,6 +1843,9 @@ static int parse_packet_header(WMAVoiceContext *s)
skip_bits(gb, 4); // packet sequence number
s->has_residual_lsps = get_bits1(gb);
do {
if (get_bits_left(gb) < 6 + s->spillover_bitsize)
return AVERROR_INVALIDDATA;
res = get_bits(gb, 6); // number of superframes per packet
// (minus first one if there is spillover)
n_superframes += res;