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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-27 18:44:44 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:43 +0100 |
| commit | c7520f4825c8e69df44f6176c2a9437b6d5ef8cd (patch) | |
| tree | 6e1c7d43e6156124f2903c3ec8d04d8eeb1084cf | |
| parent | c5ecfccb5f496ea6226b58ba550cce7695cc6799 (diff) | |
| download | ffmpeg-c7520f4825c8e69df44f6176c2a9437b6d5ef8cd.tar.gz | |
avcodec/sbcdec: Fix integer overflows in sbc_synthesize_eight()
Fixes: signed integer overflow: 518484152 + 1868182638 cannot be represented in type 'int'
Fixes: 17732/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SBC_fuzzer-5663738132168704
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 c70d547751cb3b536f9bca8b060d94f527695b71)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/sbcdec.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/libavcodec/sbcdec.c b/libavcodec/sbcdec.c index 937946e2d2..23226d5155 100644 --- a/libavcodec/sbcdec.c +++ b/libavcodec/sbcdec.c @@ -270,14 +270,14 @@ static inline void sbc_synthesize_eight(struct sbc_decoder_state *state, /* Distribute the new matrix value to the shifted position */ v[offset[i]] = - ( ff_synmatrix8[i][0] * frame->sb_sample[blk][ch][0] + - ff_synmatrix8[i][1] * frame->sb_sample[blk][ch][1] + - ff_synmatrix8[i][2] * frame->sb_sample[blk][ch][2] + - ff_synmatrix8[i][3] * frame->sb_sample[blk][ch][3] + - ff_synmatrix8[i][4] * frame->sb_sample[blk][ch][4] + - ff_synmatrix8[i][5] * frame->sb_sample[blk][ch][5] + - ff_synmatrix8[i][6] * frame->sb_sample[blk][ch][6] + - ff_synmatrix8[i][7] * frame->sb_sample[blk][ch][7] ) >> 15; + (int)( (unsigned)ff_synmatrix8[i][0] * frame->sb_sample[blk][ch][0] + + (unsigned)ff_synmatrix8[i][1] * frame->sb_sample[blk][ch][1] + + (unsigned)ff_synmatrix8[i][2] * frame->sb_sample[blk][ch][2] + + (unsigned)ff_synmatrix8[i][3] * frame->sb_sample[blk][ch][3] + + (unsigned)ff_synmatrix8[i][4] * frame->sb_sample[blk][ch][4] + + (unsigned)ff_synmatrix8[i][5] * frame->sb_sample[blk][ch][5] + + (unsigned)ff_synmatrix8[i][6] * frame->sb_sample[blk][ch][6] + + (unsigned)ff_synmatrix8[i][7] * frame->sb_sample[blk][ch][7] ) >> 15; } /* Compute the samples */ @@ -286,16 +286,16 @@ static inline void sbc_synthesize_eight(struct sbc_decoder_state *state, /* Store in output, Q0 */ AV_WN16A(&output_frame->data[ch][blk * 16 + i * 2], av_clip_int16( - ( v[offset[i] + 0] * ff_sbc_proto_8_80m0[idx + 0] + - v[offset[k] + 1] * ff_sbc_proto_8_80m1[idx + 0] + - v[offset[i] + 2] * ff_sbc_proto_8_80m0[idx + 1] + - v[offset[k] + 3] * ff_sbc_proto_8_80m1[idx + 1] + - v[offset[i] + 4] * ff_sbc_proto_8_80m0[idx + 2] + - v[offset[k] + 5] * ff_sbc_proto_8_80m1[idx + 2] + - v[offset[i] + 6] * ff_sbc_proto_8_80m0[idx + 3] + - v[offset[k] + 7] * ff_sbc_proto_8_80m1[idx + 3] + - v[offset[i] + 8] * ff_sbc_proto_8_80m0[idx + 4] + - v[offset[k] + 9] * ff_sbc_proto_8_80m1[idx + 4] ) >> 15)); + (int)( (unsigned)v[offset[i] + 0] * ff_sbc_proto_8_80m0[idx + 0] + + (unsigned)v[offset[k] + 1] * ff_sbc_proto_8_80m1[idx + 0] + + (unsigned)v[offset[i] + 2] * ff_sbc_proto_8_80m0[idx + 1] + + (unsigned)v[offset[k] + 3] * ff_sbc_proto_8_80m1[idx + 1] + + (unsigned)v[offset[i] + 4] * ff_sbc_proto_8_80m0[idx + 2] + + (unsigned)v[offset[k] + 5] * ff_sbc_proto_8_80m1[idx + 2] + + (unsigned)v[offset[i] + 6] * ff_sbc_proto_8_80m0[idx + 3] + + (unsigned)v[offset[k] + 7] * ff_sbc_proto_8_80m1[idx + 3] + + (unsigned)v[offset[i] + 8] * ff_sbc_proto_8_80m0[idx + 4] + + (unsigned)v[offset[k] + 9] * ff_sbc_proto_8_80m1[idx + 4] ) >> 15)); } } |