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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-24 13:45:35 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-25 02:48:01 +0200 |
| commit | 8b9e522e08d91d06dae059a844c2bf20c696a078 (patch) | |
| tree | 7d0c1d2d6414aa362d2b1297d2c2207ef089df98 | |
| parent | bb02e5bc09186e20f98d90e32311fd514c69ac56 (diff) | |
| download | ffmpeg-8b9e522e08d91d06dae059a844c2bf20c696a078.tar.gz | |
avcodec/mpeg4videodec: Fix GMC with videos of dimension 1
Fixes: runtime error: shift exponent -1 is negative
Fixes: 2338/clusterfuzz-testcase-minimized-5153426541379584
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 4976a3411f71518d17a57e373b62517f066648fd)
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 24bff114dd..d4c24c398e 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -171,7 +171,7 @@ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *g int a = 2 << s->sprite_warping_accuracy; int rho = 3 - s->sprite_warping_accuracy; int r = 16 / a; - int alpha = 0; + int alpha = 1; int beta = 0; int w = s->width; int h = s->height; |