From: Christoph Hellwig <hch@infradead.org>
To: Juerg Haefliger <juerg.haefliger@hpe.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
kernel-hardening@lists.openwall.com,
linux-x86_64@vger.kernel.org, vpk@cs.columbia.edu
Subject: Re: [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled
Date: Wed, 14 Sep 2016 00:33:40 -0700 [thread overview]
Message-ID: <20160914073340.GA28090@infradead.org> (raw)
In-Reply-To: <20160914071901.8127-4-juerg.haefliger@hpe.com>
On Wed, Sep 14, 2016 at 09:19:01AM +0200, Juerg Haefliger wrote:
> This is a temporary hack to prevent the use of bio_map_user_iov()
> which causes XPFO page faults.
>
> Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
Sorry, but if your scheme doesn't support get_user_pages access to
user memory is't a steaming pile of crap and entirely unacceptable.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Juerg Haefliger <juerg.haefliger@hpe.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
kernel-hardening@lists.openwall.com,
linux-x86_64@vger.kernel.org, vpk@cs.columbia.edu
Subject: Re: [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled
Date: Wed, 14 Sep 2016 00:33:40 -0700 [thread overview]
Message-ID: <20160914073340.GA28090@infradead.org> (raw)
In-Reply-To: <20160914071901.8127-4-juerg.haefliger@hpe.com>
On Wed, Sep 14, 2016 at 09:19:01AM +0200, Juerg Haefliger wrote:
> This is a temporary hack to prevent the use of bio_map_user_iov()
> which causes XPFO page faults.
>
> Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
Sorry, but if your scheme doesn't support get_user_pages access to
user memory is't a steaming pile of crap and entirely unacceptable.
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WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Juerg Haefliger <juerg.haefliger@hpe.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
kernel-hardening@lists.openwall.com,
linux-x86_64@vger.kernel.org, vpk@cs.columbia.edu
Subject: [kernel-hardening] Re: [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled
Date: Wed, 14 Sep 2016 00:33:40 -0700 [thread overview]
Message-ID: <20160914073340.GA28090@infradead.org> (raw)
In-Reply-To: <20160914071901.8127-4-juerg.haefliger@hpe.com>
On Wed, Sep 14, 2016 at 09:19:01AM +0200, Juerg Haefliger wrote:
> This is a temporary hack to prevent the use of bio_map_user_iov()
> which causes XPFO page faults.
>
> Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
Sorry, but if your scheme doesn't support get_user_pages access to
user memory is't a steaming pile of crap and entirely unacceptable.
next prev parent reply other threads:[~2016-09-14 7:33 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-26 14:21 [RFC PATCH] Add support for eXclusive Page Frame Ownership (XPFO) Juerg Haefliger
2016-02-26 14:21 ` Juerg Haefliger
2016-03-01 1:31 ` Laura Abbott
2016-03-01 1:31 ` Laura Abbott
2016-03-21 8:37 ` Juerg Haefliger
2016-03-21 8:37 ` Juerg Haefliger
2016-03-28 19:29 ` Laura Abbott
2016-03-28 19:29 ` Laura Abbott
2016-03-01 2:10 ` Balbir Singh
2016-03-01 2:10 ` Balbir Singh
2016-03-21 8:44 ` Juerg Haefliger
2016-03-21 8:44 ` Juerg Haefliger
2016-04-01 0:21 ` Balbir Singh
2016-04-01 0:21 ` Balbir Singh
2016-09-02 11:39 ` [RFC PATCH v2 0/3] " Juerg Haefliger
2016-09-02 11:39 ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39 ` Juerg Haefliger
2016-09-02 11:39 ` [RFC PATCH v2 1/3] " Juerg Haefliger
2016-09-02 11:39 ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39 ` Juerg Haefliger
2016-09-02 11:39 ` [RFC PATCH v2 2/3] xpfo: Only put previous userspace pages into the hot cache Juerg Haefliger
2016-09-02 11:39 ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39 ` Juerg Haefliger
2016-09-02 20:39 ` Dave Hansen
2016-09-02 20:39 ` [kernel-hardening] " Dave Hansen
2016-09-02 20:39 ` Dave Hansen
2016-09-05 11:54 ` Juerg Haefliger
2016-09-05 11:54 ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39 ` [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled Juerg Haefliger
2016-09-02 11:39 ` [kernel-hardening] " Juerg Haefliger
2016-09-02 11:39 ` Juerg Haefliger
2016-09-14 7:18 ` [RFC PATCH v2 0/3] Add support for eXclusive Page Frame Ownership (XPFO) Juerg Haefliger
2016-09-14 7:18 ` [kernel-hardening] " Juerg Haefliger
2016-09-14 7:18 ` Juerg Haefliger
2016-09-14 7:18 ` [RFC PATCH v2 1/3] " Juerg Haefliger
2016-09-14 7:18 ` [kernel-hardening] " Juerg Haefliger
2016-09-14 7:18 ` Juerg Haefliger
2016-09-14 7:19 ` [RFC PATCH v2 2/3] xpfo: Only put previous userspace pages into the hot cache Juerg Haefliger
2016-09-14 7:19 ` [kernel-hardening] " Juerg Haefliger
2016-09-14 7:19 ` Juerg Haefliger
2016-09-14 14:33 ` [kernel-hardening] " Dave Hansen
2016-09-14 14:33 ` Dave Hansen
2016-09-14 14:40 ` Juerg Haefliger
2016-09-14 14:48 ` Dave Hansen
2016-09-14 14:48 ` Dave Hansen
2016-09-21 5:32 ` Juerg Haefliger
2016-09-14 7:19 ` [RFC PATCH v2 3/3] block: Always use a bounce buffer when XPFO is enabled Juerg Haefliger
2016-09-14 7:19 ` [kernel-hardening] " Juerg Haefliger
2016-09-14 7:19 ` Juerg Haefliger
2016-09-14 7:33 ` Christoph Hellwig [this message]
2016-09-14 7:33 ` [kernel-hardening] " Christoph Hellwig
2016-09-14 7:33 ` Christoph Hellwig
2016-09-14 7:23 ` [RFC PATCH v2 0/3] Add support for eXclusive Page Frame Ownership (XPFO) Juerg Haefliger
2016-09-14 7:23 ` [kernel-hardening] " Juerg Haefliger
2016-09-14 9:36 ` [kernel-hardening] " Mark Rutland
2016-09-14 9:36 ` Mark Rutland
2016-09-14 9:49 ` Mark Rutland
2016-09-14 9:49 ` Mark Rutland
2016-11-04 14:45 ` [RFC PATCH v3 0/2] " Juerg Haefliger
2016-11-04 14:45 ` [kernel-hardening] " Juerg Haefliger
2016-11-04 14:45 ` Juerg Haefliger
2016-11-04 14:45 ` [RFC PATCH v3 1/2] " Juerg Haefliger
2016-11-04 14:45 ` [kernel-hardening] " Juerg Haefliger
2016-11-04 14:45 ` Juerg Haefliger
2016-11-04 14:50 ` Christoph Hellwig
2016-11-04 14:50 ` [kernel-hardening] " Christoph Hellwig
2016-11-04 14:50 ` Christoph Hellwig
2016-11-10 5:53 ` [kernel-hardening] " ZhaoJunmin Zhao(Junmin)
2016-11-10 5:53 ` ZhaoJunmin Zhao(Junmin)
2016-11-10 5:53 ` ZhaoJunmin Zhao(Junmin)
2016-11-10 19:11 ` Kees Cook
2016-11-10 19:11 ` [kernel-hardening] " Kees Cook
2016-11-10 19:11 ` Kees Cook
2016-11-15 11:15 ` Juerg Haefliger
2016-11-15 11:15 ` [kernel-hardening] " Juerg Haefliger
2016-11-15 11:15 ` Juerg Haefliger
2016-11-10 19:24 ` Kees Cook
2016-11-10 19:24 ` [kernel-hardening] " Kees Cook
2016-11-10 19:24 ` Kees Cook
2016-11-15 11:18 ` Juerg Haefliger
2016-11-15 11:18 ` [kernel-hardening] " Juerg Haefliger
2016-11-15 11:18 ` Juerg Haefliger
2016-11-24 10:56 ` AKASHI Takahiro
2016-11-24 10:56 ` [kernel-hardening] " AKASHI Takahiro
2016-11-24 10:56 ` AKASHI Takahiro
2016-11-28 11:15 ` Juerg Haefliger
2016-11-28 11:15 ` [kernel-hardening] " Juerg Haefliger
2016-12-09 9:02 ` AKASHI Takahiro
2016-12-09 9:02 ` [kernel-hardening] " AKASHI Takahiro
2016-12-09 9:02 ` AKASHI Takahiro
2016-11-04 14:45 ` [RFC PATCH v3 2/2] xpfo: Only put previous userspace pages into the hot cache Juerg Haefliger
2016-11-04 14:45 ` [kernel-hardening] " Juerg Haefliger
2016-11-04 14:45 ` Juerg Haefliger
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