| Date | Thu, 23 Nov 2017 20:36:22 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH v2 12/18] x86/espfix/64: Stop assuming that pt_regs is on the entry stack |
| |
On Tue, 21 Nov 2017, Andy Lutomirski wrote:
> When we start using an entry trampoline, a #GP from userspace will > be delivered on the entry stack, not on the task stack. Fix the > espfix64 #DF fixup to set up #GP according to TSS.SP0, rather than > assuming that pt_regs + 1 == SP0. This won't change anything > without an entry stack, but it will make the code continue to work > when an entry stack is added. > > Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
|