ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Thu Jul 3 03:22:44 2025 +0200| [b2858d462de97145312dc04d347569a491312c8f] | committer: Michael Niedermayer
avcodec/apv_dsp: Avoid UB overflow in dequant Fixes: signed integer overflow: 33632416 * 64 cannot be represented in type 'int' Fixes: 421817631/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APV_fuzzer-4957386534354944 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=b2858d462de97145312dc04d347569a491312c8f --- libavcodec/apv_dsp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/apv_dsp.c b/libavcodec/apv_dsp.c index 07bb34ec0b..8fbabcf63d 100644 --- a/libavcodec/apv_dsp.c +++ b/libavcodec/apv_dsp.c @@ -58,8 +58,8 @@ static void apv_decode_transquant_c(void *output, for (int y = 0; y < 8; y++) { for (int x = 0; x < 8; x++) { - int coeff = (input[y][x] * qmatrix[y][x] * (1 << qp_shift) + - (1 << (bd_shift - 1))) >> bd_shift; + int coeff = ((int)(input[y][x] * qmatrix[y][x] * (1U << qp_shift) + + (1 << (bd_shift - 1)))) >> bd_shift; scaled_coeff[y][x] = av_clip(coeff, APV_MIN_TRANS_COEFF, _______________________________________________ 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".
