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avformat/mov: Fix incorrect overflow detection in mov_read_sidx()

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Fixes: signed integer overflow: 9223372036854775807 + 1442840321 cannot be represented in type 'long'
Fixes: 33670/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6644379491106816

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 200406d930)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-28 16:53:52 +02:00
parent 890a801468
commit da9e84fabd
1 changed files with 1 additions and 1 deletions
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2
libavformat/mov.c
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@ -5132,7 +5132,7 @@ static int mov_read_sidx(MOVContext *c, AVIOContext *pb, MOVAtom atom)
if (frag_stream_info)
frag_stream_info->sidx_pts = timestamp;
if (av_sat_add64(offset, size) != offset + size ||
if (av_sat_add64(offset, size) != offset + (uint64_t)size ||
av_sat_add64(pts, duration) != pts + (uint64_t)duration
)
return AVERROR_INVALIDDATA;