linux-kernel - Re: [PATCH 00/10] Control Flow Enforcement

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Message-ID: <1530024994.27091.0.camel@intel.com>
Date:   Tue, 26 Jun 2018 07:56:34 -0700
From:   Yu-cheng Yu <yu-cheng.yu@...el.com>
To:     Jann Horn <jannh@...gle.com>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        linux-doc@...r.kernel.org, Linux-MM <linux-mm@...ck.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, hjl.tools@...il.com,
        vedvyas.shanbhogue@...el.com, ravi.v.shankar@...el.com,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...capital.net>,
        Jonathan Corbet <corbet@....net>,
        Oleg Nesterov <oleg@...hat.com>, Arnd Bergmann <arnd@...db.de>,
        Mike Kravetz <mike.kravetz@...cle.com>
Subject: Re: [PATCH 00/10] Control Flow Enforcement - Part (3)

On Tue, 2018-06-26 at 04:46 +0200, Jann Horn wrote:
> On Tue, Jun 26, 2018 at 4:45 AM Yu-cheng Yu <yu-cheng.yu@...el.com>
> wrote:
> > 
> > 
> > This series introduces CET - Shadow stack
> > 
> > At the high level, shadow stack is:
> > 
> >         Allocated from a task's address space with vm_flags
> > VM_SHSTK;
> >         Its PTEs must be read-only and dirty;
> >         Fixed sized, but the default size can be changed by sys
> > admin.
> > 
> > For a forked child, the shadow stack is duplicated when the next
> > shadow stack access takes place.
> > 
> > For a pthread child, a new shadow stack is allocated.
> > 
> > The signal handler uses the same shadow stack as the main program.
> > 
> > Yu-cheng Yu (10):
> >   x86/cet: User-mode shadow stack support
> >   x86/cet: Introduce WRUSS instruction
> >   x86/cet: Signal handling for shadow stack
> >   x86/cet: Handle thread shadow stack
> >   x86/cet: ELF header parsing of Control Flow Enforcement
> >   x86/cet: Add arch_prctl functions for shadow stack
> >   mm: Prevent mprotect from changing shadow stack
> >   mm: Prevent mremap of shadow stack
> >   mm: Prevent madvise from changing shadow stack
> >   mm: Prevent munmap and remap_file_pages of shadow stack
> Shouldn't patches like these be CC'ed to linux-api@...r.kernel.org?

Yes, I will do that.

Thanks,
Yu-cheng