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avformat/mpsubdec: Use av_sat_add/sub64() in fracval handling
authorMichael Niedermayer <michael@niedermayer.cc>
Sat, 16 Jan 2021 20:48:57 +0000 (21:48 +0100)
committerMichael Niedermayer <michael@niedermayer.cc>
Tue, 26 Jan 2021 17:37:12 +0000 (18:37 +0100)
commit463e024363d0ba0254c1f08b348bef02f148bb6a
treea0532cbacdc0969cb3208037d8e3cccfcd39655ctree | snapshot
parentcb316676112c01e8d66420908b6b3d06b3b498e3commit | diff
avformat/mpsubdec: Use av_sat_add/sub64() in fracval handling

Fixes: signed integer overflow: 9223372036850000000 + 9000000 cannot be represented in type 'long long'
Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_MPSUB_fuzzer-665448017480908
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavformat/mpsubdec.c diff | blob | history
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