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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-06 13:32:54 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-17 15:57:27 +0200 |
| commit | a5c83b586b8097948a9cbba8937f89245cad4274 (patch) | |
| tree | 3d3a3c19e9deb87921a032bf96aea9c6f6c531cd | |
| parent | 55fe7a738f4ca6a92972f699f5d8816a5e133405 (diff) | |
| download | ffmpeg-a5c83b586b8097948a9cbba8937f89245cad4274.tar.gz | |
avcodec/mpeg4videodec: Clear mcsel before decoding an image
Fixes: runtime error: signed integer overflow: 2146467840 + 1032192 cannot be represented in type 'int'
Fixes: 2826/clusterfuzz-testcase-minimized-5901511613743104
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 7735ed29741d985e1e670249ca56e7a1ce18b729)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mpeg4videodec.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c index 2e74a33758..d04286bc3d 100644 --- a/libavcodec/mpeg4videodec.c +++ b/libavcodec/mpeg4videodec.c @@ -2283,6 +2283,7 @@ static int decode_vop_header(Mpeg4DecContext *ctx, GetBitContext *gb) int time_incr, time_increment; int64_t pts; + s->mcsel = 0; s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */ if (s->pict_type == AV_PICTURE_TYPE_B && s->low_delay && ctx->vol_control_parameters == 0 && !(s->avctx->flags & AV_CODEC_FLAG_LOW_DELAY)) { |