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| author | Michael Niedermayer <michael@niedermayer.cc> | 2022-01-17 16:26:05 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-04-06 21:27:35 +0300 |
| commit | 673f8d3641ced5c25862815ec458a4c9820c5162 (patch) | |
| tree | 3e451e03edd724ec9f696b7d97a93ca9b19bbd40 /libavformat | |
| parent | 447b9a0f030653cc6687905cc642453fa2063284 (diff) | |
avformat/mov: Check size before subtraction
Fixes: signed integer overflow: -9223372036854775808 - 8 cannot be represented in type 'long'
Fixes: 43542/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5237670148702208
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 d8d9d506a3de976b647bcbb8f76c7b8d30eff576)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/mov.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c index 47160fd551..092c899fff 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -7078,6 +7078,8 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom) if (a.size == 0) { a.size = atom.size - total_size + 8; } + if (a.size < 0) + break; a.size -= 8; if (a.size < 0) break; |