Re: [PATCH] x86 : Ensure X86_FLAGS_NT is cleared on syscall entry

From: H. Peter Anvin
Date: Mon Sep 29 2014 - 16:02:05 EST

On 09/29/2014 12:57 PM, Thomas Gleixner wrote:
>> I think we should mask the bit anyway.
> I tend to disagree. If we clear it there we need to consequentely
> audit ALL other possibilites and if there are any we need to clear the
> bit there as well. Just to make buggy user space happy?

The entry options into the kernel are: interrupt/exception (already
known to be OK), SYSENTER32, SYSCALL32, and SYSCALL64. It is not too
much to work through those issues, I don't think.


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