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avformat/mov: check for pts overflow in mov_read_sidx()

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Fixes: signed integer overflow: 9223372036846336888 + 4278255871 cannot be represented in type 'long'
Fixes: 32782/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6059216516284416

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-15 18:43:25 +02:00
parent 718e03e5f2
commit ee53bb2399
1 changed files with 3 additions and 1 deletions
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4
libavformat/mov.c
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@ -5111,7 +5111,9 @@ 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 + size ||
av_sat_add64(pts, duration) != pts + (uint64_t)duration
)
return AVERROR_INVALIDDATA;
offset += size;
pts += duration;