virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-13 21:28:01 +02:00
Code Issues Releases Activity

avcodec/mpeg4videodec: more unsigned in amv computation

Browse Source 
Fixes: signed integer overflow: -2147483648 + -1048576 cannot be represented in type 'int'
Fixes: 59365/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-642654923954585

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 0adaa90d89)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2023-06-01 23:35:10 +02:00
parent b91b26813c
commit 06ff2bfe0f
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavcodec/mpeg4videodec.c
View File

@ -685,7 +685,7 @@ static inline int get_amv(Mpeg4DecContext *ctx, int n)
for (y = 0; y < 16; y++) {
int v;
v = mb_v + dy * y;
v = mb_v + (unsigned)dy * y;
// FIXME optimize
for (x = 0; x < 16; x++) {
sum += v >> shift;