On Sun, Sep 20, 2020 at 10:26:07PM +0200, Michael Niedermayer wrote: > Fixes: signed integer overflow: 2 * 2132811776 cannot be represented in type > 'int' > Fixes: > 25722/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-6221704077246464 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavformat/moflex.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/libavformat/moflex.c b/libavformat/moflex.c > index 2111157408..937f63cb63 100644 > --- a/libavformat/moflex.c > +++ b/libavformat/moflex.c > @@ -62,6 +62,8 @@ static int pop_int(BitReader *br, AVIOContext *pb, int n) > > if (ret < 0) > return ret; > + if (ret > INT_MAX - value - value) > + return AVERROR_INVALIDDATA; > value = 2 * value + ret;
Generally acceptable. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
