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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-15 23:22:50 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-31 18:34:05 +0200 |
| commit | cc78783ce5e8837d4f4ca43eedf2d299651e65ff (patch) | |
| tree | 5f1a1a18e9ed1c4d3ca0ac406a2887cb245fbbe1 /libavcodec | |
| parent | 5a3dee65d4fade2172c1e83da9cea3e3ae665897 (diff) | |
avcodec/truemotion2: Fix multiple integer overflows in tm2_null_res_block()
Fixes: signed integer overflow: 1795032576 + 598344192 cannot be represented in type 'int'
Fixes: 16196/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5636723419119616
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/truemotion2.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c index 5d6dfc24c3..27c876fd7d 100644 --- a/libavcodec/truemotion2.c +++ b/libavcodec/truemotion2.c @@ -619,7 +619,7 @@ static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int ct = ctx->D[0] + ctx->D[1] + ctx->D[2] + ctx->D[3]; if (bx > 0) - left = last[-1] - ct; + left = last[-1] - (unsigned)ct; else left = 0; @@ -630,7 +630,7 @@ static inline void tm2_null_res_block(TM2Context *ctx, AVFrame *pic, int bx, int last[2] = right - (diff >> 2); last[3] = right; { - int tp = left; + unsigned tp = left; ctx->D[0] = (tp + (ct >> 2)) - left; left += ctx->D[0]; |