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Date: Thu, 25 Apr 2019 22:49:04 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Rick Edgecombe <rick.p.edgecombe@...el.com>
Cc: Borislav Petkov <bp@...en8.de>, Andy Lutomirski <luto@...nel.org>,
Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
x86@...nel.org, hpa@...or.com, Thomas Gleixner <tglx@...utronix.de>,
Nadav Amit <nadav.amit@...il.com>,
Dave Hansen <dave.hansen@...ux.intel.com>, linux_dti@...oud.com,
linux-integrity@...r.kernel.org,
linux-security-module@...r.kernel.org, akpm@...ux-foundation.org,
kernel-hardening@...ts.openwall.com, linux-mm@...ck.org,
will.deacon@....com, ard.biesheuvel@...aro.org,
kristen@...ux.intel.com, deneen.t.dock@...el.com
Subject: Re: [PATCH v4 00/23] Merge text_poke fixes and executable lockdowns
On Thu, Apr 25, 2019 at 10:48:20PM +0200, Peter Zijlstra wrote:
> On Mon, Apr 22, 2019 at 11:57:42AM -0700, Rick Edgecombe wrote:
> > Andy Lutomirski (1):
> > x86/mm: Introduce temporary mm structs
> >
> > Nadav Amit (15):
> > Fix "x86/alternatives: Lockdep-enforce text_mutex in text_poke*()"
> > x86/jump_label: Use text_poke_early() during early init
> > x86/mm: Save DRs when loading a temporary mm
> > fork: Provide a function for copying init_mm
> > x86/alternative: Initialize temporary mm for patching
> > x86/alternative: Use temporary mm for text poking
> > x86/kgdb: Avoid redundant comparison of patched code
> > x86/ftrace: Set trampoline pages as executable
> > x86/kprobes: Set instruction page as executable
> > x86/module: Avoid breaking W^X while loading modules
> > x86/jump-label: Remove support for custom poker
> > x86/alternative: Remove the return value of text_poke_*()
> > x86/alternative: Comment about module removal races
> > tlb: provide default nmi_uaccess_okay()
> > bpf: Fail bpf_probe_write_user() while mm is switched
> >
> > Rick Edgecombe (7):
> > x86/mm/cpa: Add set_direct_map_ functions
> > mm: Make hibernate handle unmapped pages
> > vmalloc: Add flag for free of special permsissions
> > modules: Use vmalloc special flag
> > bpf: Use vmalloc special flag
> > x86/ftrace: Use vmalloc special flag
> > x86/kprobes: Use vmalloc special flag
>
> This all looks good to me, I'll queue them tomorrow when I'm awake
> again. I'll move the last two patches to early in the series, since it
> appears to me they're fixes and should be in place before we make the
> situation worse with the temporary mm swizzling for text_poke.
>
> If you want to post a new version of patch 4 before then, that'd be
> awesome, otherwise I'll see if I can do those few edits myself.
Patch 3 that was, see, I can't even count straight atm :-)
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