diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-28 21:20:43 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-19 00:05:50 +0100 |
| commit | 8c9a5a0fe9f27be35332a2b8f604dc85d219a056 (patch) | |
| tree | 4690be7cdc59769ca5fa3e2d6d2d5209e9dc3c1e /libavformat/mov.c | |
| parent | ac6c8993f79eaefb76e1fdf0eef5373ab3a46a4e (diff) | |
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>
Diffstat (limited to 'libavformat/mov.c')
| -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 3215b53636..ad0b9a58d3 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -7071,7 +7071,7 @@ 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) |