RepoMirrors/ffmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2025-02-24 15:57:00 +00:00
Code Issues Projects Releases Wiki Activity

avcodec/utils: Check ima wav duration for overflow

Browse Source 
Fixes: signed integer overflow: 44331634 * 65 cannot be represented in type 'int'
Fixes: 32120/clusterfuzz-testcase-minimized-ffmpeg_dem_RSD_fuzzer-5760221223583744

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 f40e9b1355)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-10 20:32:55 +02:00
parent 05954971ba
commit dcdb7d2dab
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
libavcodec/utils.c
View File

@ -1700,11 +1700,15 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
if (ba > 0) { if (ba > 0) {
/* calc from frame_bytes, channels, and block_align */ /* calc from frame_bytes, channels, and block_align */
int blocks = frame_bytes / ba; int blocks = frame_bytes / ba;
int64_t tmp;
switch (id) { switch (id) {
case AV_CODEC_ID_ADPCM_IMA_WAV: case AV_CODEC_ID_ADPCM_IMA_WAV:
if (bps < 2 || bps > 5) if (bps < 2 || bps > 5)
return 0; return 0;
return blocks * (1 + (ba - 4 * ch) / (bps * ch) * 8); tmp = blocks * (1LL + (ba - 4 * ch) / (bps * ch) * 8);
if (tmp != (int)tmp)
return 0;
return tmp;
case AV_CODEC_ID_ADPCM_IMA_DK3: case AV_CODEC_ID_ADPCM_IMA_DK3:
return blocks * (((ba - 16) * 2 / 3 * 4) / ch); return blocks * (((ba - 16) * 2 / 3 * 4) / ch);
case AV_CODEC_ID_ADPCM_IMA_DK4: case AV_CODEC_ID_ADPCM_IMA_DK4: