Re: [RFC/PATCH 4/7] x86/entry/32: Finish removing bogus kernel-mode check

[Andy Lutomirski]

[cc: Al -- saying I'm cc-ing you in the patch 0 description doesn't make it so.]

On Wed, Jul 8, 2015 at 12:24 PM, Andy Lutomirski <luto@xxxxxxxxxx> wrote:
> Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
> ---
>  arch/x86/entry/entry_32.S | 7 -------
>  1 file changed, 7 deletions(-)
>
> diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
> index d36afad80ad1..66ff9c4055d7 100644
> --- a/arch/x86/entry/entry_32.S
> +++ b/arch/x86/entry/entry_32.S
> @@ -491,13 +491,6 @@ work_notifysig:                                    # deal with pending signals and
>  #endif
>         TRACE_IRQS_ON
>         ENABLE_INTERRUPTS(CLBR_NONE)
> -       /* Temporary sanity check */
> -       movb    PT_CS(%esp), %bl
> -       andb    $SEGMENT_RPL_MASK, %bl
> -       cmpb    $USER_RPL, %bl
> -       jnb     2f
> -       ud2
> -2:
>         xorl    %edx, %edx
>         call    do_notify_resume
>         jmp     resume_userspace
> --
> 2.4.3
>



-- 
Andy Lutomirski
AMA Capital Management, LLC
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