Re: [PATCH v21 06/26] x86/cet: Add control-protection fault handler

[Yu, Yu-cheng]

On 2/24/2021 8:53 AM, Borislav Petkov wrote:
> On Wed, Feb 24, 2021 at 08:44:45AM -0800, Yu, Yu-cheng wrote:
> > > > +	force_sig_fault(SIGSEGV, SEGV_CPERR,
> > > > +			(void __user *)uprobe_get_trap_addr(regs));
> > >
> > > Why is this calling an uprobes function?
> >
> > I will change it to error_get_trap_addr().
>
> "/*
>    * Posix requires to provide the address of the faulting instruction for
>    * SIGILL (#UD) and SIGFPE (#DE) in the si_addr member of siginfo_t.
>    ..."
>
> Is yours SIGILL or SIGFPE?

No.  Maybe I am doing too much.  The GP fault sets si_addr to zero, for 
example.  So maybe do the same here?