Subject: Bug#887873: linux-image-4.9.0-5-marvell: frequent "usercopy: kernel memory overwrite attempt detected" on QNAP NAS (ARM)

From: [email-masked] (Andrew Lunn)
Date: Wed, 7 Mar 2018 23:27:22 +0100

On Thu, Mar 08, 2018 at 09:49:29AM +1300, Menno Finlay-Smits wrote:
> On Thu, 8 Mar 2018, at 02:36, Andrew Lunn wrote:
> > > What else can I try?
> > 
> > Do you have transparent huge pages enabled?
> > 
> > ~$ cat /sys/kernel/mm/transparent_hugepage/enabled 
> > [always] madvise never
> > 
> > If so, could you disable it with:
> > 
> > echo never > /sys/kernel/mm/transparent_hugepage/enabled
> > 
> > and run your rsync command.

Hi Menno

Could you also try linux-image-4.14.0-3-marvell from sid?

There does not appear to be a 4.15 yet for marvell.

      Andrew