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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-28 21:20:43 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-02 14:18:21 +0100 |
| commit | 3d5610712fb4792e07d4477717a72c435bd9414b (patch) | |
| tree | b5adeaae17085836b63d82119384f51cab0cf4a2 | |
| parent | fefb5d52ca2f106b8fbd45d79fc6e96607a19d26 (diff) | |
| download | ffmpeg-3d5610712fb4792e07d4477717a72c435bd9414b.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 cf3d41e78d..f2550d1852 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -7046,7 +7046,7 @@ 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) |