mirrors/librempeg
1
0
Fork 0
mirror of https://github.com/librempeg/librempeg synced 2024-11-22 00:51:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

avformat/pcm: Use 64bit in bitrate computation

Browse Source 
Fixes: signed integer overflow: 65792 * 65312 cannot be represented in type 'int'
Fixes: 67819/clusterfuzz-testcase-minimized-ffmpeg_dem_WADY_fuzzer-5236100912185344

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Michael Niedermayer 2024-04-04 00:42:20 +02:00 committed by Paul B Mahol
parent cec072d1a3
commit 9771463c1f
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavformat/pcm.c
View File

@ -41,7 +41,7 @@ int ff_pcm_default_packet_size(AVCodecParameters *par)
/* Don't trust the codecpar bitrate if we can calculate it ourselves */
if (bits_per_sample > 0 && par->sample_rate > 0 && par->ch_layout.nb_channels > 0)
if ((int64_t)par->sample_rate * par->ch_layout.nb_channels < INT64_MAX / bits_per_sample)
bitrate = bits_per_sample * par->sample_rate * par->ch_layout.nb_channels;
bitrate = bits_per_sample * (int64_t)par->sample_rate * par->ch_layout.nb_channels;
if (bitrate > 0) {
nb_samples = av_clip64(bitrate / 8 / PCM_DEMUX_TARGET_FPS / par->block_align, 1, max_samples);