Commit c5f265bb authored by Michael Niedermayer's avatar Michael Niedermayer

avcodec/atrac9dec: Check conditions before apply_band_extension() to avoid out...

avcodec/atrac9dec: Check conditions before apply_band_extension() to avoid out of array read in initialization of unused variables

Fixes: global-buffer-overflow
Fixes: 15247/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC9_fuzzer-5671602181636096

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent ed4c6ce7
......@@ -539,9 +539,6 @@ static inline void apply_band_extension(ATRAC9Context *s, ATRAC9BlockData *b,
at9_q_unit_to_coeff_idx[g_units[3]],
};
if (!b->has_band_ext || !b->has_band_ext_data)
return;
for (int ch = 0; ch <= stereo; ch++) {
ATRAC9ChannelData *c = &b->channel[ch];
......@@ -751,7 +748,9 @@ static int atrac9_decode_block(ATRAC9Context *s, GetBitContext *gb,
apply_intensity_stereo(s, b, stereo);
apply_scalefactors (s, b, stereo);
apply_band_extension (s, b, stereo);
if (b->has_band_ext && b->has_band_ext_data)
apply_band_extension (s, b, stereo);
imdct:
for (int i = 0; i <= stereo; i++) {
......
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