[FFmpeg-devel] [PATCH 1/4] avformat/asfdec_o: Check size vs. offset in detect_unknown_subobject()

[Michael Niedermayer]

On Tue, Jan 12, 2021 at 10:51:13PM +0100, Michael Niedermayer wrote:
> Fixes: signed integer overflow: 2314885530818453566 + 7503032301549264928 cannot be represented in type 'long'
> Fixes: 26639/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_O_fuzzer-6024222100684800
> 
> Alternatively this could be ignored but then the end condition of the loop
> would be hard to reach as avio_tell() is int64_t
> 
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavformat/asfdec_o.c | 3 +++
>  1 file changed, 3 insertions(+)

will apply

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Old school: Use the lowest level language in which you can solve the problem
            conveniently.
New school: Use the highest level language in which the latest supercomputer
            can solve the problem without the user falling asleep waiting.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 195 bytes
Desc: not available
URL: <https://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20210120/28ac2b01/attachment.sig>