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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-09-25 02:01:58 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-09-30 22:23:02 +0200 |
| commit | a8a98ba9eeedc0c4b5d95e3b61840174cd254bca (patch) | |
| tree | ce2c1d47348dde6095cf01725c8a94b1ce99faf1 /libavcodec | |
| parent | 2076e11839b35c62e28642dcf71c95304af9222f (diff) | |
| download | ffmpeg-a8a98ba9eeedc0c4b5d95e3b61840174cd254bca.tar.gz | |
avcodec/wcmv: Fix integer overflows
Fixes: signed integer overflow: 262140 * 65535 cannot be represented in type 'int'
Fixes: 10090/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WCMV_fuzzer-5691269368512512
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/wcmv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/wcmv.c b/libavcodec/wcmv.c index 384ceecd32..ebd5ef66f4 100644 --- a/libavcodec/wcmv.c +++ b/libavcodec/wcmv.c @@ -113,6 +113,8 @@ static int decode_frame(AVCodecContext *avctx, bytestream2_skip(&bgb, 4); w = bytestream2_get_le16(&bgb); h = bytestream2_get_le16(&bgb); + if (x + bpp * (int64_t)w * h > INT_MAX) + return AVERROR_INVALIDDATA; x += bpp * w * h; } @@ -140,6 +142,8 @@ static int decode_frame(AVCodecContext *avctx, bytestream2_skip(&gb, 4); w = bytestream2_get_le16(&gb); h = bytestream2_get_le16(&gb); + if (x + bpp * (int64_t)w * h > INT_MAX) + return AVERROR_INVALIDDATA; x += bpp * w * h; } |