Browse Source

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>
(cherry picked from commit 19c41969b2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
tags/n4.2.2
Michael Niedermayer 6 years ago
parent
commit
ddb35d510e
1 changed files with 3 additions and 0 deletions
  1. +3
    -0
      libavcodec/wmavoice.c

+ 3
- 0
libavcodec/wmavoice.c View File

@@ -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;


Loading…
Cancel
Save