ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Sun May 10 19:04:23 2020 +0200| [2b9f39689ab19c68ff37b5a4ac71e8fb7f58c487] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2b9f39689ab19c68ff37b5a4ac71e8fb7f58c487 --- libavcodec/mpc.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/libavcodec/mpc.c b/libavcodec/mpc.c index 6cf9b9d520..e56b608d8c 100644 --- a/libavcodec/mpc.c +++ b/libavcodec/mpc.c @@ -75,17 +75,17 @@ 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]; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
