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From: Kees Cook <keescook@chromium.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>,
	Greg KH <gregkh@linuxfoundation.org>,
	Will Deacon <will.deacon@arm.com>,
	"Reshetova, Elena" <elena.reshetova@intel.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	David Windsor <dave@progbits.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC][PATCH 7/7] kref: Implement using refcount_t
Date: Tue, 15 Nov 2016 11:23:46 -0800	[thread overview]
Message-ID: <CAGXu5j+FHmbGvvXg5tYP1w2pjqMnso=VuJnUetobON35B-kEpA@mail.gmail.com> (raw)
In-Reply-To: <32165F01-DA9E-4287-9831-6EDE40A71E83@infradead.org>

On Tue, Nov 15, 2016 at 11:16 AM, Peter Zijlstra <peterz@infradead.org> wrote:
>
>
> On 15 November 2016 19:06:28 CET, Kees Cook <keescook@chromium.org> wrote:
>
>>I'll want to modify this in the future; I have a config already doing
>>"Bug on data structure corruption" that makes the warn/bug choice.
>>It'll need some massaging to fit into the new refcount_t checks, but
>>it should be okay -- there needs to be a way to complete the
>>saturation, etc, but still kill the offending process group.
>
> Ideally we'd create a new WARN like construct that continues in kernel space and terminates the process on return to user. That way there would be minimal kernel state corruption.

Right, though I'd like to be conservative about the kernel execution
continuing... I'll experiment with it.

-Kees

-- 
Kees Cook
Nexus Security

  reply	other threads:[~2016-11-15 19:23 UTC|newest]

Thread overview: 96+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-14 17:39 [RFC][PATCH 0/7] kref improvements Peter Zijlstra
2016-11-14 17:39 ` [RFC][PATCH 1/7] kref: Add KREF_INIT() Peter Zijlstra
2016-11-14 17:39 ` [RFC][PATCH 2/7] kref: Add kref_read() Peter Zijlstra
2016-11-14 18:16   ` Christoph Hellwig
2016-11-15  7:28     ` Greg KH
2016-11-15  7:47       ` Peter Zijlstra
2016-11-15  8:37       ` [PATCH] printk, locking/atomics, kref: Introduce new %pAr and %pAk format string options for atomic_t and 'struct kref' Ingo Molnar
2016-11-15  8:43         ` [PATCH v2] " Ingo Molnar
2016-11-15  9:21           ` Peter Zijlstra
2016-11-15  9:41             ` [PATCH v3] printk, locking/atomics, kref: Introduce new %pAa " Ingo Molnar
2016-11-15 10:10           ` [PATCH v2] printk, locking/atomics, kref: Introduce new %pAr " kbuild test robot
2016-11-15 16:42         ` [PATCH] " Linus Torvalds
2016-11-16  8:13           ` Ingo Molnar
2016-11-15  7:33   ` [RFC][PATCH 2/7] kref: Add kref_read() Greg KH
2016-11-15  8:03     ` Peter Zijlstra
2016-11-15 20:53       ` Kees Cook
2016-11-16  8:21         ` Greg KH
2016-11-16 10:10           ` Peter Zijlstra
2016-11-16 10:18             ` Greg KH
2016-11-16 10:11           ` Daniel Borkmann
2016-11-16 10:19             ` Greg KH
2016-11-16 10:09         ` Peter Zijlstra
2016-11-16 18:58           ` Kees Cook
2016-11-17  8:34             ` Peter Zijlstra
2016-11-17 12:30               ` David Windsor
2016-11-17 12:43                 ` Peter Zijlstra
2016-11-17 13:01                   ` Reshetova, Elena
2016-11-17 13:22                     ` Peter Zijlstra
2016-11-17 15:42                       ` Reshetova, Elena
2016-11-17 18:02                       ` Reshetova, Elena
2016-11-17 19:10                         ` Peter Zijlstra
2016-11-17 19:29                         ` Peter Zijlstra
2016-11-17 19:34               ` Kees Cook
2016-11-14 17:39 ` [RFC][PATCH 3/7] kref: Kill kref_sub() Peter Zijlstra
2016-11-14 17:39 ` [RFC][PATCH 4/7] kref: Use kref_get_unless_zero() more Peter Zijlstra
2016-11-14 17:39 ` [RFC][PATCH 5/7] kref: Implement kref_put_lock() Peter Zijlstra
2016-11-14 20:35   ` Kees Cook
2016-11-15  7:50     ` Peter Zijlstra
2016-11-14 17:39 ` [RFC][PATCH 6/7] kref: Avoid more abuse Peter Zijlstra
2016-11-14 17:39 ` [RFC][PATCH 7/7] kref: Implement using refcount_t Peter Zijlstra
2016-11-15  8:40   ` Ingo Molnar
2016-11-15  9:47     ` Peter Zijlstra
2016-11-15 10:03       ` Ingo Molnar
2016-11-15 10:46         ` Peter Zijlstra
2016-11-15 13:03           ` Ingo Molnar
2016-11-15 18:06             ` Kees Cook
2016-11-15 19:16               ` Peter Zijlstra
2016-11-15 19:23                 ` Kees Cook [this message]
2016-11-16  8:31                   ` Ingo Molnar
2016-11-16  8:51                     ` Greg KH
2016-11-16  9:07                       ` Ingo Molnar
2016-11-16  9:24                         ` Greg KH
2016-11-16 10:15                     ` Peter Zijlstra
2016-11-16 18:55                       ` Kees Cook
2016-11-17  8:33                         ` Peter Zijlstra
2016-11-17 19:50                           ` Kees Cook
2016-11-16 18:41                     ` Kees Cook
2016-11-15 12:33   ` Boqun Feng
2016-11-15 13:01     ` Peter Zijlstra
2016-11-15 14:19       ` Boqun Feng
2016-11-17  9:28         ` Peter Zijlstra
2016-11-17  9:48           ` Boqun Feng
2016-11-17 10:29             ` Peter Zijlstra
2016-11-17 10:39               ` Peter Zijlstra
2016-11-17 11:03                 ` Greg KH
2016-11-17 12:48                   ` Peter Zijlstra
     [not found]               ` <CAL0jBu-GnREUPSX4kUDp-Cc8ZGp6+Cb2q0HVandswcLzPRnChQ@mail.gmail.com>
2016-11-17 12:08                 ` Peter Zijlstra
2016-11-17 12:08           ` Will Deacon
2016-11-17 16:11             ` Peter Zijlstra
2016-11-17 16:36               ` Will Deacon
2016-11-18  8:26                 ` Boqun Feng
2016-11-18 10:16                   ` Will Deacon
2016-11-18 10:07   ` Reshetova, Elena
2016-11-18 11:37     ` Peter Zijlstra
2016-11-18 17:06       ` Will Deacon
2016-11-18 18:57         ` Peter Zijlstra
2016-11-21  4:06         ` Boqun Feng
2016-11-21  7:48           ` Ingo Molnar
2016-11-21  8:38             ` Boqun Feng
2016-11-21  8:44       ` Boqun Feng
2016-11-21  9:02         ` Peter Zijlstra
2016-11-21  9:37           ` Boqun Feng
2016-11-18 10:47   ` Reshetova, Elena
2016-11-18 10:52     ` Peter Zijlstra
2016-11-18 16:58       ` Reshetova, Elena
2016-11-18 18:53         ` Peter Zijlstra
2016-11-19  7:14           ` Reshetova, Elena
2016-11-19 11:45             ` Peter Zijlstra
2017-01-26 23:14   ` Kees Cook
2017-01-27  9:58     ` Peter Zijlstra
2017-01-27 21:07       ` Kees Cook
2017-01-30 13:40         ` Peter Zijlstra
2016-11-15  7:27 ` [RFC][PATCH 0/7] kref improvements Greg KH
2016-11-15  7:42   ` Ingo Molnar
2016-11-15 15:05     ` Greg KH
2016-11-15  7:48   ` Peter Zijlstra

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