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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-28 21:20:43 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | 0c45348beffde91fc5a702273d79b5b4437c014f (patch) | |
| tree | fd73f940817563c4de57024edf1d4f33ec5b62b9 | |
| parent | 3df814c73540be949993bf1185b1388dda92d4bb (diff) | |
| download | ffmpeg-0c45348beffde91fc5a702273d79b5b4437c014f.tar.gz | |
avformat/mov: Check a.size before computing next_root_atom
Fixes: signed integer overflow: 64 + 9223372036854775799 cannot be represented in type 'long'
Fixes: 27563/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6244650163372032
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 8c9a5a0fe9f27be35332a2b8f604dc85d219a056)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mov.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c index dc3c22c14d..18b8d8f609 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -6898,7 +6898,7 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom) c->atom_depth --; return err; } - if (c->found_moov && c->found_mdat && + if (c->found_moov && c->found_mdat && a.size <= INT64_MAX - start_pos && ((!(pb->seekable & AVIO_SEEKABLE_NORMAL) || c->fc->flags & AVFMT_FLAG_IGNIDX || c->frag_index.complete) || start_pos + a.size == avio_size(pb))) { if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || c->fc->flags & AVFMT_FLAG_IGNIDX || c->frag_index.complete) |