On Thu, Oct 10, 2019 at 10:40:07PM +1100, Aleksa Sarai wrote:
> Yeah, it takes about 5-10s on my laptop. We could switch it to just
> everything within a 4K block, but the main reason for testing with
> 2*PAGE_SIZE is to make sure that check_nonzero_user() works across page
> boundaries. Though we
On 2019-10-10, Michael Ellerman wrote:
> Aleksa Sarai writes:
> > A common pattern for syscall extensions is increasing the size of a
> > struct passed from userspace, such that the zero-value of the new fields
> > result in the old kernel behaviour (allowing for a mix of userspace and
> > kernel
Hi Aleksa,
Aleksa Sarai writes:
> A common pattern for syscall extensions is increasing the size of a
> struct passed from userspace, such that the zero-value of the new fields
> result in the old kernel behaviour (allowing for a mix of userspace and
> kernel vintages to operate on one another in
On Tue, Oct 01, 2019 at 04:31:27AM +0200, Christian Brauner wrote:
> On Mon, Sep 30, 2019 at 06:58:39PM -0700, Kees Cook wrote:
> > On Tue, Oct 01, 2019 at 11:10:52AM +1000, Aleksa Sarai wrote:
> > > +static __always_inline
> > > +int copy_struct_from_user(void *dst, size_t ksize,
> > > +
On Mon, Sep 30, 2019 at 06:58:39PM -0700, Kees Cook wrote:
> On Tue, Oct 01, 2019 at 11:10:52AM +1000, Aleksa Sarai wrote:
> > A common pattern for syscall extensions is increasing the size of a
> > struct passed from userspace, such that the zero-value of the new fields
> > result in the old kerne
On Tue, Oct 01, 2019 at 11:10:52AM +1000, Aleksa Sarai wrote:
> A common pattern for syscall extensions is increasing the size of a
> struct passed from userspace, such that the zero-value of the new fields
> result in the old kernel behaviour (allowing for a mix of userspace and
> kernel vintages
A common pattern for syscall extensions is increasing the size of a
struct passed from userspace, such that the zero-value of the new fields
result in the old kernel behaviour (allowing for a mix of userspace and
kernel vintages to operate on one another in most cases).
While this interface exists
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