Re: WARNING in kmem_cache_free

[Matthew Wilcox]

On Fri, Apr 06, 2018 at 03:33:36PM +0200, Dmitry Vyukov wrote:
> On Fri, Apr 6, 2018 at 3:24 PM, syzbot
> <syzbot+75397ee3df5c70164154@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> > Unfortunately, I don't have any reproducer for this crash yet.
> 
> Interesting type of bug, I think we see this for the first time.

Can you focus syzbot to try to find a reproducer?  This seems to be
produced by calling mount() with a pathname that's somewhere between,
say, 3950 & 4100 bytes long from a compat 32-bit task.