On Tue, 2016-11-15 at 10:59:38 UTC, Michael Ellerman wrote: > This is used in poison.h to offset poison values so that they don't > point directly into user space. > > The value we choose sits roughly between user and kernel space, which > means on their own the poison values don't point anywhere useful. If an > attacker can cause an access at some offset from the poison value then > we may still be in trouble, but by putting the poison values between > user and kernel space we maximise the required size of that offset. > > Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Applied to powerpc next. https://git.kernel.org/powerpc/c/f6853eb561fb9bfd56dfe0009f0ea2 cheers
