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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-28 23:20:43 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-10 17:04:26 +0300 |
| commit | bd899b2ceebcc6f2ce624fda7be4cfc4bef6a015 (patch) | |
| tree | 7ec48b851baf57394948728c12762990b4b60f77 /libavformat/mov.c | |
| parent | 1adc3490110dc44ba8ed5ec056deb7d0044ca2c9 (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>
(cherry picked from commit 8c9a5a0fe9f27be35332a2b8f604dc85d219a056)
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 e654e351e0..09d55da624 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -6892,7 +6892,7 @@ 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) |