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authorMichael Niedermayer <michael@niedermayer.cc>2019-11-12 18:47:52 +0100
committerMichael Niedermayer <michael@niedermayer.cc>2020-04-23 21:29:01 +0200
commit3510a1869edf4cd2678c7126989a5464fcd97f7d (patch)
tree94444719bd6230d3cf5ea562c366a495dd30887b /libavcodec
parentde9507480ad2833ad0b7fa63b1ff0ed6ed0fc376 (diff)
downloadffmpeg-3510a1869edf4cd2678c7126989a5464fcd97f7d.tar.gz
avcodec/truemotion2: Fix 2 integer overflows in tm2_low_res_block()
Fixes: signed integer overflow: 1778647621 + 574372924 cannot be represented in type 'int' Fixes: 18692/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEMOTION2_fuzzer-6248679635943424 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 93d52a181ec050d3a4fb68f526604d39cd006be5) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
-rw-r--r--libavcodec/truemotion2.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index d4bd698e9f..5b9fa565fd 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -565,10 +565,10 @@ static inline void tm2_low_res_block(TM2Context *ctx, AVFrame *pic, int bx, int
last[0] = (int)((unsigned)last[1] - ctx->D[0] - ctx->D[1] - ctx->D[2] - ctx->D[3])>> 1;
last[2] = (int)((unsigned)last[1] + last[3]) >> 1;
- t1 = ctx->D[0] + ctx->D[1];
+ t1 = ctx->D[0] + (unsigned)ctx->D[1];
ctx->D[0] = t1 >> 1;
ctx->D[1] = t1 - (t1 >> 1);
- t2 = ctx->D[2] + ctx->D[3];
+ t2 = ctx->D[2] + (unsigned)ctx->D[3];
ctx->D[2] = t2 >> 1;
ctx->D[3] = t2 - (t2 >> 1);