ffmpeg | branch: release/3.2 | Michael Niedermayer <mich...@niedermayer.cc> | Mon Jan 17 14:26:05 2022 +0100| [446cfcf01a9bc03e0065936ce5b88d5a2f143d96] | committer: Michael Niedermayer
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 <mich...@niedermayer.cc> (cherry picked from commit d8d9d506a3de976b647bcbb8f76c7b8d30eff576) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=446cfcf01a9bc03e0065936ce5b88d5a2f143d96 --- libavformat/mov.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/mov.c b/libavformat/mov.c index b6d97bf12a..71e68dc9a4 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -5033,6 +5033,8 @@ 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; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
