Re: [PATCH] psi: Fix OOB write when writing 0 bytes to psi files

[Peter Zijlstra]

On Tue, Feb 04, 2020 at 01:55:23PM -0500, Johannes Weiner wrote:
> On Mon, Feb 03, 2020 at 01:22:16PM -0800, Suren Baghdasaryan wrote:
> > Issuing write() with count parameter set to 0 on any file under
> > /proc/pressure/ will cause an OOB write because of the access to
> > buf[buf_size-1] when NUL-termination is performed. Fix this by checking
> > for buf_size to be non-zero.
> > 
> > Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx>
> 
> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>

Thanks!