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avcodec/adpcm_data: extend ff_adpcm_ima_cunning_index_table

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Fixes: overread by 1
Fixes: 21880/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_IMA_CUNNING_fuzzer-5717917221257216.fuzz

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
2020-05-28 00:05:16 +02:00
parent 83fa39eb06
commit 9d24f293e7
2 changed files with 3 additions and 3 deletions
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4
libavcodec/adpcm_data.c
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@@ -178,8 +178,8 @@ const int16_t ff_adpcm_mtaf_stepsize[32][16] = {
-424, -1273, -2121, -2970, -3819, -4668, -5516, -6365, }, -424, -1273, -2121, -2970, -3819, -4668, -5516, -6365, },
}; };
const int8_t ff_adpcm_ima_cunning_index_table[8] = { const int8_t ff_adpcm_ima_cunning_index_table[9] = {
-1, -1, -1, -1, 1, 2, 3, 4, -1, -1, -1, -1, 1, 2, 3, 4, -1
}; };
const int16_t ff_adpcm_ima_cunning_step_table[61] = { const int16_t ff_adpcm_ima_cunning_step_table[61] = {

2
libavcodec/adpcm_data.h
View File

@@ -42,7 +42,7 @@ extern const int16_t ff_adpcm_yamaha_indexscale[];
extern const int8_t ff_adpcm_yamaha_difflookup[]; extern const int8_t ff_adpcm_yamaha_difflookup[];
extern const int16_t ff_adpcm_afc_coeffs[2][16]; extern const int16_t ff_adpcm_afc_coeffs[2][16];
extern const int16_t ff_adpcm_mtaf_stepsize[32][16]; extern const int16_t ff_adpcm_mtaf_stepsize[32][16];
extern const int8_t ff_adpcm_ima_cunning_index_table[8]; extern const int8_t ff_adpcm_ima_cunning_index_table[9];
extern const int16_t ff_adpcm_ima_cunning_step_table[61]; extern const int16_t ff_adpcm_ima_cunning_step_table[61];
#endif /* AVCODEC_ADPCM_DATA_H */ #endif /* AVCODEC_ADPCM_DATA_H */