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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-02-22 21:57:49 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-14 12:20:15 +0200 |
| commit | 025af5ccd16c69d15cb8608491b8ad90c57fe592 (patch) | |
| tree | b3323b5483b1c9f07672249b9110ea12fb92cdd7 | |
| parent | 706dd2331a587b115ae5d62de315c96a7f29f06f (diff) | |
| download | ffmpeg-025af5ccd16c69d15cb8608491b8ad90c57fe592.tar.gz | |
avcodec/mpeg4videodec: Check sprite_offset in addition to shifts
Fixes: 651/clusterfuzz-testcase-5710668915277824
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 6871df02d973c9ffc1aa4f6d08fb4b1b63d411be)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mpeg4videodec.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index c2a9e1e892..a4cb2c4195 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -368,8 +368,13 @@ static int mpeg4_decode_sprite_trajectory(Mpeg4DecContext *ctx, GetBitContext *g int shift_y = 16 - ctx->sprite_shift[0]; int shift_c = 16 - ctx->sprite_shift[1]; - if (shift_c < 0 || shift_y < 0) { - avpriv_request_sample(s->avctx, "Too large sprite shift"); + if (shift_c < 0 || shift_y < 0 || + FFABS(s->sprite_offset[0][0]) >= INT_MAX >> shift_y || + FFABS(s->sprite_offset[1][0]) >= INT_MAX >> shift_c || + FFABS(s->sprite_offset[0][1]) >= INT_MAX >> shift_y || + FFABS(s->sprite_offset[1][1]) >= INT_MAX >> shift_c + ) { + avpriv_request_sample(s->avctx, "Too large sprite shift or offset"); return AVERROR_PATCHWELCOME; } |