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From: Peter Zijlstra <peterz@infradead.org>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Kees Cook <keescook@chromium.org>,
	"Reshetova, Elena" <elena.reshetova@intel.com>,
	Greg KH <gregkh@linuxfoundation.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@kernel.org>,
	"H. Peter Anvin" <h.peter.anvin@intel.com>,
	Will Deacon <will.deacon@arm.com>,
	David Windsor <dwindsor@gmail.com>,
	Hans Liljestrand <ishkamiel@gmail.com>,
	David Howells <dhowells@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>,
	"kernel-hardening@lists.openwall.com" 
	<kernel-hardening@lists.openwall.com>
Subject: Re: [kernel-hardening] Re: [PATCH 4/4] refcount: Report failures through CHECK_DATA_CORRUPTION
Date: Tue, 7 Feb 2017 16:07:37 +0100	[thread overview]
Message-ID: <20170207150737.GM25813@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20170207135020.GA26173@leverpostej>

On Tue, Feb 07, 2017 at 01:50:20PM +0000, Mark Rutland wrote:
> > Right something along those lines. (a) will need GCC help, and (b) would
> > be kernel-arch specific. So this isn't something we can quickly do.
> 
> I agree this isn't something that can be hacked together quickly, and
> certainly shouldn't block these patches.
> 
> However, I don't think we need anything new from GCC, and I think we
> already have a generic API for (b).
> 
> For (a) we don't need new GCC help if we do something like we did in
> commit 72c5839515260dce to do the mangling. Prepend a prefix to the
> register, e.g. changing 'x0' to '__pt_regs_offset_x0', which we arrange
> to hold the correct value.

I'm not sure I can decipher that commit and therefore have no idea if
something similar can be done for other architectures.

  reply	other threads:[~2017-02-07 15:07 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-03 23:26 [PATCH 0/4] refcount_t followups Kees Cook
2017-02-03 23:26 ` [kernel-hardening] " Kees Cook
2017-02-03 23:26 ` [PATCH 1/4] refcount_t: fix Kconfig help Kees Cook
2017-02-03 23:26   ` [kernel-hardening] " Kees Cook
2017-02-03 23:26 ` [PATCH 2/4] lkdtm: convert to refcount_t testing Kees Cook
2017-02-03 23:26   ` [kernel-hardening] " Kees Cook
2017-02-10  8:32   ` [tip:locking/core] lkdtm: Convert " tip-bot for Kees Cook
2017-02-03 23:26 ` [PATCH 3/4] bug: Switch data corruption check to __must_check Kees Cook
2017-02-03 23:26   ` [kernel-hardening] " Kees Cook
2017-02-03 23:26 ` [PATCH 4/4] refcount: Report failures through CHECK_DATA_CORRUPTION Kees Cook
2017-02-03 23:26   ` [kernel-hardening] " Kees Cook
2017-02-05 15:40   ` Peter Zijlstra
2017-02-05 15:40     ` [kernel-hardening] " Peter Zijlstra
2017-02-05 23:33     ` Kees Cook
2017-02-05 23:33       ` [kernel-hardening] " Kees Cook
2017-02-06  8:57       ` Peter Zijlstra
2017-02-06  8:57         ` [kernel-hardening] " Peter Zijlstra
2017-02-06 16:54         ` Kees Cook
2017-02-06 16:54           ` [kernel-hardening] " Kees Cook
2017-02-07  8:34           ` Peter Zijlstra
2017-02-07  8:34             ` [kernel-hardening] " Peter Zijlstra
2017-02-07 11:10             ` Mark Rutland
2017-02-07 11:10               ` Mark Rutland
2017-02-07 12:36               ` Peter Zijlstra
2017-02-07 12:36                 ` Peter Zijlstra
2017-02-07 13:50                 ` Mark Rutland
2017-02-07 13:50                   ` Mark Rutland
2017-02-07 15:07                   ` Peter Zijlstra [this message]
2017-02-07 15:07                     ` Peter Zijlstra
2017-02-07 16:03                     ` Mark Rutland
2017-02-07 16:03                       ` Mark Rutland
2017-02-07 17:30                       ` Peter Zijlstra
2017-02-07 17:30                         ` Peter Zijlstra
2017-02-07 17:55                         ` Mark Rutland
2017-02-07 17:55                           ` Mark Rutland
2017-02-08  9:12                           ` Peter Zijlstra
2017-02-08  9:12                             ` Peter Zijlstra
2017-02-08  9:43                             ` Peter Zijlstra
2017-02-08  9:43                               ` Peter Zijlstra
2017-02-08 14:10                             ` Mark Rutland
2017-02-08 14:10                               ` Mark Rutland
2017-02-08 21:20                             ` Kees Cook
2017-02-08 21:20                               ` Kees Cook
2017-02-09 10:27                               ` Peter Zijlstra
2017-02-09 10:27                                 ` Peter Zijlstra
2017-02-10 23:39                                 ` Kees Cook
2017-02-10 23:39                                   ` Kees Cook

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