Re: Kernel oops with 2.6.26, padlock and ipsec: probably problem with fpu state changes

Suresh Siddha
2008-08-08T23:15:26Z

On Fri, Aug 08, 2008 at 04:10:42PM -0700, Wolfgang Walter wrote:
> By the way, if padlock is used from userspace, could this be aproblem, too? I
> mean not via the kernel crypto layer but directly. I think these extensions
> are not restricted to a privileged user.

No. Userspace will not have any such issue. Kernel is special, as it
has to preserve the user-space context and also use these instructions
for its own kernel purpose.

It is ok to get a spurious DNA from userland.

thanks,
suresh