virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-08-04 22:03:09 +02:00
Code Issues Releases Activity

avcodec/apv_dsp: Avoid UB overflow in dequant

Browse Source 
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 <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2025-07-03 03:22:44 +02:00
parent af3852e22c
commit b2858d462d
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
libavcodec/apv_dsp.c
View File

@ -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,