tree 408b519405bd8545f8da4102ac120db58d2a1f3e
parent 6b1873371cea13036171d03a7c1e3e59158b4505
author Richard Weinberger <richard@nod.at> 1439151993 +0200
committer Richard Weinberger <richard@nod.at> 1445288017 +0200

um: Fix kernel mode fault condition

We have to exclude memory locations <= PAGE_SIZE from
the condition and let the kernel mode fault path catch it.
Otherwise a kernel NULL pointer exception will be reported
as a kernel user space access.

Fixes: d2313084e2c (um: Catch unprotected user memory access)
Signed-off-by: Richard Weinberger <richard@nod.at>