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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-28 20:29:02 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-07-19 02:48:39 +0200 |
| commit | 73f42b7b58caea043578f6041be655b15c14fc70 (patch) | |
| tree | 1c2b8eb95acad00ef0ad90ad48de7a94ec2b9e70 | |
| parent | 634e9a696d85fd32456f61aa23ca5f90544788fe (diff) | |
| download | ffmpeg-73f42b7b58caea043578f6041be655b15c14fc70.tar.gz | |
avcodec/vb: Check vertical GMC component before multiply
Fixes: runtime error: signed integer overflow: 8224 * 663584 cannot be represented in type 'int'
Fixes: 2393/clusterfuzz-testcase-minimized-6128334993883136
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 bc6ab72bc7af27189e7b524b97e45c6fcadab5cf)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vb.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/vb.c b/libavcodec/vb.c index 560165adc7..021657f7d8 100644 --- a/libavcodec/vb.c +++ b/libavcodec/vb.c @@ -205,6 +205,10 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, if (flags & VB_HAS_GMC) { i = (int16_t)bytestream2_get_le16(&c->stream); j = (int16_t)bytestream2_get_le16(&c->stream); + if (FFABS(j) > avctx->height) { + av_log(avctx, AV_LOG_ERROR, "GMV out of range\n"); + return AVERROR_INVALIDDATA; + } offset = i + j * avctx->width; } if (flags & VB_HAS_VIDEO) { |