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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-17 01:12:55 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-17 02:40:21 +0200 |
| commit | 792f15c109cc7f64d19ed139f63dcb4b33329eba (patch) | |
| tree | 6e3d1fbb51d5e5bfac1f7f9f340b8befeddd6a97 | |
| parent | 63cc52ed97f57ae47f47118ee84ac3877c591b82 (diff) | |
| download | ffmpeg-792f15c109cc7f64d19ed139f63dcb4b33329eba.tar.gz | |
avcodec/flicvideo: Check frame_size before decrementing
Fixes: runtime error: signed integer overflow: -2147483627 - 22 cannot be represented in type 'int'
Fixes: 1637/clusterfuzz-testcase-minimized-5376582493405184
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 355e27e24dc88d6ba8f27501a34925d9d937a399)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/flicvideo.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/flicvideo.c b/libavcodec/flicvideo.c index c9c6c24e55..192d4fe8a7 100644 --- a/libavcodec/flicvideo.c +++ b/libavcodec/flicvideo.c @@ -202,6 +202,9 @@ static int flic_decode_frame_8BPP(AVCodecContext *avctx, num_chunks = bytestream2_get_le16(&g2); bytestream2_skip(&g2, 8); /* skip padding */ + if (frame_size < 16) + return AVERROR_INVALIDDATA; + frame_size -= 16; /* iterate through the chunks */ @@ -522,6 +525,8 @@ static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, if (frame_size > buf_size) frame_size = buf_size; + if (frame_size < 16) + return AVERROR_INVALIDDATA; frame_size -= 16; /* iterate through the chunks */ |