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avformat/mov: Check dts for overflow in mov_read_trun()

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Fixes: signed integer overflow: 9223372034248226491 + 3275247799 cannot be represented in type 'long'
Fixes: clusterfuzz-testcase-minimized-audio_decoder_fuzzer-4538729166077952

Reported-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4de4bc06fdfd0383f3d9012c6557a38408a09d28)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-08-26 13:37:27 +02:00
parent d24e2c121b
commit 684a8847e3
1 changed files with 2 additions and 0 deletions
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libavformat/mov.c
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@ -4978,6 +4978,8 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
"size %u, distance %d, keyframe %d\n", st->index,
index_entry_pos, offset, dts, sample_size, distance, keyframe);
distance++;
if (av_sat_add64(dts, sample_duration) != dts + (uint64_t)sample_duration)
return AVERROR_INVALIDDATA;
dts += sample_duration;
offset += sample_size;
sc->data_size += sample_size;