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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-03-03 20:12:20 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-03-05 12:01:41 +0100 |
| commit | fab13bbbcdf92da165f1a6be94fbb8f87fac639a (patch) | |
| tree | ebd1319239bad731b511c65bf66ff366cc3340d7 | |
| parent | d757ddbaab8f03b3664788e620314b70ac791319 (diff) | |
| download | ffmpeg-fab13bbbcdf92da165f1a6be94fbb8f87fac639a.tar.gz | |
avcodec/mpeg4videodec: Fix runtime error: signed integer overflow: 134527392 * 16 cannot be represented in type 'int'
This checks the sprite delta intermediates for overflow
Fixes: 716/clusterfuzz-testcase-4890287480504320
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mpeg4videodec.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 568263ecdf..128469d755 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -389,7 +389,10 @@ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *g for (i = 0; i < 2; i++) { if (llabs(s->sprite_offset[0][i] + s->sprite_delta[i][0] * (w+16LL)) >= INT_MAX || llabs(s->sprite_offset[0][i] + s->sprite_delta[i][1] * (h+16LL)) >= INT_MAX || - llabs(s->sprite_offset[0][i] + s->sprite_delta[i][0] * (w+16LL) + s->sprite_delta[i][1] * (h+16LL)) >= INT_MAX) { + llabs(s->sprite_offset[0][i] + s->sprite_delta[i][0] * (w+16LL) + s->sprite_delta[i][1] * (h+16LL)) >= INT_MAX || + llabs(s->sprite_delta[i][0] * (w+16LL)) >= INT_MAX || + llabs(s->sprite_delta[i][1] * (w+16LL)) >= INT_MAX + ) { avpriv_request_sample(s->avctx, "Overflow on sprite points"); goto overflow; } |