Re: binderfs interferes with syzkaller?

[Christian Brauner]

On Sun, Jan 26, 2020 at 09:55:35AM +0100, Greg Kroah-Hartman wrote:
> On Sat, Jan 25, 2020 at 06:49:49PM +0100, Dmitry Vyukov wrote:
> > Hi binder maintainers,
> > 
> > It seems that something has happened and now syzbot has 0 coverage in
> > drivers/android/binder.c:
> > https://storage.googleapis.com/syzkaller/cover/ci-upstream-kasan-gce-root.html
> > It covered at least something there before as it found some bugs in binder code.
> > I _suspect_ it may be related to introduction binderfs, but it's
> > purely based on the fact that binderfs changed lots of things there.
> > And I see it claims to be backward compatible.
> 
> It is backwards compatible if you mount binderfs, right?

Yes, it is backwards compatible. The devices that would usually be
created in devtmpfs are now created in binderfs. The core
binder-codepaths are the same.

Christian