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author | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-10 19:04:23 +0200 |
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committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
commit | cc7f140e0f2fbf39843e9a57baebff7d96f7235b (patch) | |
tree | a5a9c3aa1b96cfc4096b33d0f3dc70d21700e97f | |
parent | bc0017335b40c44569a126f50b2ae0e6797e34f9 (diff) | |
download | ffmpeg-cc7f140e0f2fbf39843e9a57baebff7d96f7235b.tar.gz |
avcodec/mpc: Fix multiple numerical overflows in ff_mpc_dequantize_and_synth()
Fixes: -2.4187e+09 is outside the range of representable values of type 'int'
Fixes: signed integer overflow: -14512205 + -2147483648 cannot be represented in type 'int'
Fixes: 20492/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPC7_fuzzer-5747263166480384
Fixes: 23528/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPC7_fuzzer-5747263166480384
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 2b9f39689ab19c68ff37b5a4ac71e8fb7f58c487)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
-rw-r--r-- | libavcodec/mpc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/mpc.c b/libavcodec/mpc.c index 7af30bd0e1..9cd7fc5c2f 100644 --- a/libavcodec/mpc.c +++ b/libavcodec/mpc.c @@ -76,17 +76,17 @@ void ff_mpc_dequantize_and_synth(MPCContext * c, int maxband, int16_t **out, j = 0; mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][0] & 0xFF]; for(; j < 12; j++) - c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; + c->sb_samples[ch][j][i] = av_clipf(mul * c->Q[ch][j + off], INT32_MIN, INT32_MAX); mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][1] & 0xFF]; for(; j < 24; j++) - c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; + c->sb_samples[ch][j][i] = av_clipf(mul * c->Q[ch][j + off], INT32_MIN, INT32_MAX); mul = (mpc_CC+1)[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][2] & 0xFF]; for(; j < 36; j++) - c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; + c->sb_samples[ch][j][i] = av_clipf(mul * c->Q[ch][j + off], INT32_MIN, INT32_MAX); } } if(bands[i].msf){ - int t1, t2; + unsigned t1, t2; for(j = 0; j < SAMPLES_PER_BAND; j++){ t1 = c->sb_samples[0][j][i]; t2 = c->sb_samples[1][j][i]; |