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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-11 22:22:57 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-03 12:10:24 +0200 |
| commit | 0e5ac35745939510f8511a40651540a1c4a50784 (patch) | |
| tree | 9dea13151cdff31d760dbecd2fb6315a88a62e24 | |
| parent | 0c0c9d15ce6dd30f4288fd1c00b5a75c1881d3af (diff) | |
| download | ffmpeg-0e5ac35745939510f8511a40651540a1c4a50784.tar.gz | |
avcodec/mpeg4videodec: Fix 2 integer overflows in get_amv()
Fixes: signed integer overflow: -144876608 * 16 cannot be represented in type 'int'
Fixes: 22782/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MPEG4_fuzzer-6039584977977344
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 e361785ee05cc75d3caacf2f254160b0336f5358)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mpeg4videodec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 8081d29d00..69ab446b59 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -610,7 +610,7 @@ static inline int get_amv(Mpeg4DecContext *ctx, int n) dy -= 1 << (shift + a + 1); else dx -= 1 << (shift + a + 1); - mb_v = s->sprite_offset[0][n] + dx * s->mb_x * 16 + dy * s->mb_y * 16; + mb_v = s->sprite_offset[0][n] + dx * s->mb_x * 16U + dy * s->mb_y * 16U; sum = 0; for (y = 0; y < 16; y++) { |