Re: [PATCH] devpts: Fix NULL pointer dereference in dcache_readdir()

[Christian Brauner]

On Fri, Oct 04, 2019 at 03:27:48PM +0100, Al Viro wrote:
> On Fri, Oct 04, 2019 at 04:05:03PM +0200, Christian Brauner wrote:
> > From: Will Deacon <will@xxxxxxxxxx>
> > 
> > Closing /dev/pts/ptmx removes the corresponding pty under /dev/pts/
> > without synchronizing against concurrent path walkers. This can lead to
> > 'dcache_readdir()' tripping over a 'struct dentry' with a NULL 'd_inode'
> > field:
> 
> FWIW, vfs.git#fixes (or #next.dcache) ought to deal with that one.

Is it feasible to backport your changes? Or do we want to merge the one
here first and backport?

Christian