Fixes:
15524/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-5173148372172800
Fixes: signed integer overflow: 13701388 - -2134868270 cannot be represented in
type 'int'
Found-by: continuous fuzzing process
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer
---
libavcodec/truemotion2.c | 8
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index a86dd16e0f..5d6dfc24c3 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -764,10 +764,10 @@ static inline void tm2_motion_block(TM2Context *ctx,
AVFrame *pic, int bx, int b
}
/* calculate deltas */
Y -= Ystride * 4;
-ctx->D[0] = Y[3] - last[3];
-ctx->D[1] = Y[3 + Ystride] - Y[3];
-ctx->D[2] = Y[3 + Ystride * 2] - Y[3 + Ystride];
-ctx->D[3] = Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
+ctx->D[0] = (unsigned)Y[3] - last[3];
+ctx->D[1] = (unsigned)Y[3 + Ystride] - Y[3];
+ctx->D[2] = (unsigned)Y[3 + Ystride * 2] - Y[3 + Ystride];
+ctx->D[3] = (unsigned)Y[3 + Ystride * 3] - Y[3 + Ystride * 2];
for (i = 0; i < 4; i++)
last[i] = Y[i + Ystride * 3];
}
--
2.22.0
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