From: Thomas Gleixner <tglx@linutronix.de>
To: Salvatore Mesoraca <s.mesoraca16@gmail.com>
Cc: linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
kernel-hardening@lists.openwall.com,
Brad Spengler <spender@grsecurity.net>,
PaX Team <pageexec@freemail.hu>,
Casey Schaufler <casey@schaufler-ca.com>,
Kees Cook <keescook@chromium.org>,
James Morris <james.l.morris@oracle.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
x86@kernel.org, Ingo Molnar <mingo@redhat.com>
Subject: Re: [PATCH 08/11] Creation of "pagefault_handler_x86" LSM hook
Date: Mon, 12 Jun 2017 19:32:30 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1706121929430.1911@nanos> (raw)
In-Reply-To: <1497286620-15027-9-git-send-email-s.mesoraca16@gmail.com>
On Mon, 12 Jun 2017, Salvatore Mesoraca wrote:
> Creation of a new hook to let LSM modules handle user-space pagefaults on
> x86.
> It can be used to avoid segfaulting the originating process.
> If it's the case it can modify process registers before returning.
That explains, what you could do with it, but it completely lacks any
rationale WHY this is desired and good behaviour and how that is a security
feature.
Thanks,
tglx
WARNING: multiple messages have this Message-ID (diff)
From: tglx@linutronix.de (Thomas Gleixner)
To: linux-security-module@vger.kernel.org
Subject: [PATCH 08/11] Creation of "pagefault_handler_x86" LSM hook
Date: Mon, 12 Jun 2017 19:32:30 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1706121929430.1911@nanos> (raw)
In-Reply-To: <1497286620-15027-9-git-send-email-s.mesoraca16@gmail.com>
On Mon, 12 Jun 2017, Salvatore Mesoraca wrote:
> Creation of a new hook to let LSM modules handle user-space pagefaults on
> x86.
> It can be used to avoid segfaulting the originating process.
> If it's the case it can modify process registers before returning.
That explains, what you could do with it, but it completely lacks any
rationale WHY this is desired and good behaviour and how that is a security
feature.
Thanks,
tglx
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WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de>
To: Salvatore Mesoraca <s.mesoraca16@gmail.com>
Cc: linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
kernel-hardening@lists.openwall.com,
Brad Spengler <spender@grsecurity.net>,
PaX Team <pageexec@freemail.hu>,
Casey Schaufler <casey@schaufler-ca.com>,
Kees Cook <keescook@chromium.org>,
James Morris <james.l.morris@oracle.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
x86@kernel.org, Ingo Molnar <mingo@redhat.com>
Subject: [kernel-hardening] Re: [PATCH 08/11] Creation of "pagefault_handler_x86" LSM hook
Date: Mon, 12 Jun 2017 19:32:30 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.20.1706121929430.1911@nanos> (raw)
In-Reply-To: <1497286620-15027-9-git-send-email-s.mesoraca16@gmail.com>
On Mon, 12 Jun 2017, Salvatore Mesoraca wrote:
> Creation of a new hook to let LSM modules handle user-space pagefaults on
> x86.
> It can be used to avoid segfaulting the originating process.
> If it's the case it can modify process registers before returning.
That explains, what you could do with it, but it completely lacks any
rationale WHY this is desired and good behaviour and how that is a security
feature.
Thanks,
tglx
next prev parent reply other threads:[~2017-06-12 17:32 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-12 16:56 [PATCH 00/11] S.A.R.A. a new stacked LSM Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 01/11] S.A.R.A. Documentation Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 17:49 ` [kernel-hardening] " Jann Horn
2017-06-12 17:49 ` Jann Horn
2017-06-13 7:43 ` Salvatore Mesoraca
2017-06-13 7:43 ` Salvatore Mesoraca
2017-06-27 22:51 ` Kees Cook
2017-06-27 22:51 ` [kernel-hardening] " Kees Cook
2017-06-27 22:51 ` Kees Cook
2017-06-27 22:54 ` Kees Cook
2017-06-27 22:54 ` [kernel-hardening] " Kees Cook
2017-06-27 22:54 ` Kees Cook
2017-07-04 10:12 ` Salvatore Mesoraca
2017-07-04 10:12 ` [kernel-hardening] " Salvatore Mesoraca
2017-07-04 10:12 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 02/11] S.A.R.A. framework creation Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 03/11] Creation of "usb_device_auth" LSM hook Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 17:35 ` Krzysztof Opasiak
2017-06-12 17:35 ` [kernel-hardening] " Krzysztof Opasiak
2017-06-12 17:35 ` Krzysztof Opasiak
2017-06-13 7:47 ` Salvatore Mesoraca
2017-06-13 7:47 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-13 7:47 ` Salvatore Mesoraca
2017-06-12 19:38 ` Greg Kroah-Hartman
2017-06-12 19:38 ` [kernel-hardening] " Greg Kroah-Hartman
2017-06-12 19:38 ` Greg Kroah-Hartman
2017-06-13 7:50 ` Salvatore Mesoraca
2017-06-13 7:50 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-13 7:50 ` Salvatore Mesoraca
2017-06-12 21:31 ` Casey Schaufler
2017-06-12 21:31 ` [kernel-hardening] " Casey Schaufler
2017-06-12 21:31 ` Casey Schaufler
2017-06-13 7:51 ` Salvatore Mesoraca
2017-06-13 7:51 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-13 7:51 ` Salvatore Mesoraca
2017-06-13 1:15 ` kbuild test robot
2017-06-13 1:15 ` [kernel-hardening] " kbuild test robot
2017-06-13 1:15 ` kbuild test robot
2017-06-13 3:11 ` kbuild test robot
2017-06-13 3:11 ` [kernel-hardening] " kbuild test robot
2017-06-13 3:11 ` kbuild test robot
2017-06-12 16:56 ` [PATCH 04/11] S.A.R.A. USB Filtering Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-20 7:07 ` Pavel Machek
2017-06-20 7:07 ` [kernel-hardening] " Pavel Machek
2017-06-20 7:53 ` Salvatore Mesoraca
2017-06-20 7:53 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-20 7:53 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 05/11] Creation of "check_vmflags" LSM hook Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 21:31 ` Casey Schaufler
2017-06-12 21:31 ` [kernel-hardening] " Casey Schaufler
2017-06-12 21:31 ` Casey Schaufler
2017-06-12 21:31 ` Casey Schaufler
2017-06-13 7:55 ` Salvatore Mesoraca
2017-06-13 7:55 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-13 7:55 ` Salvatore Mesoraca
2017-06-13 7:55 ` Salvatore Mesoraca
2017-06-13 6:34 ` Christoph Hellwig
2017-06-13 6:34 ` [kernel-hardening] " Christoph Hellwig
2017-06-13 6:34 ` Christoph Hellwig
2017-06-13 6:34 ` Christoph Hellwig
2017-06-13 7:52 ` Salvatore Mesoraca
2017-06-13 7:52 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-13 7:52 ` Salvatore Mesoraca
2017-06-13 7:52 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 06/11] S.A.R.A. cred blob management Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 07/11] S.A.R.A. WX Protection Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 08/11] Creation of "pagefault_handler_x86" LSM hook Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 17:32 ` Thomas Gleixner [this message]
2017-06-12 17:32 ` [kernel-hardening] " Thomas Gleixner
2017-06-12 17:32 ` Thomas Gleixner
2017-06-13 7:41 ` Salvatore Mesoraca
2017-06-13 7:41 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-13 7:41 ` Salvatore Mesoraca
2017-06-12 16:56 ` [PATCH 09/11] Trampoline emulation Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-13 0:02 ` kbuild test robot
2017-06-13 0:02 ` [kernel-hardening] " kbuild test robot
2017-06-13 0:02 ` kbuild test robot
2017-06-12 16:56 ` [PATCH 10/11] Allowing for stacking procattr support in S.A.R.A Salvatore Mesoraca
2017-06-12 16:56 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:56 ` Salvatore Mesoraca
2017-06-12 16:57 ` [PATCH 11/11] S.A.R.A. WX Protection procattr interface Salvatore Mesoraca
2017-06-12 16:57 ` [kernel-hardening] " Salvatore Mesoraca
2017-06-12 16:57 ` Salvatore Mesoraca
2017-07-09 19:35 ` [kernel-hardening] [PATCH 00/11] S.A.R.A. a new stacked LSM Mickaël Salaün
2017-07-10 7:59 ` Salvatore Mesoraca
2017-07-10 7:59 ` Salvatore Mesoraca
2017-07-10 23:40 ` Mickaël Salaün
2017-07-11 16:58 ` Salvatore Mesoraca
2017-07-11 16:58 ` Salvatore Mesoraca
2017-07-11 17:49 ` Matt Brown
2017-07-11 17:49 ` Matt Brown
2017-07-11 19:31 ` Mimi Zohar
2017-07-11 19:31 ` Mimi Zohar
2017-07-13 12:39 ` Matt Brown
2017-07-13 12:39 ` Matt Brown
2017-07-13 15:19 ` Mimi Zohar
2017-07-13 15:19 ` Mimi Zohar
2017-07-13 19:51 ` Serge E. Hallyn
2017-07-13 19:51 ` Serge E. Hallyn
2017-07-13 22:33 ` Matt Brown
2017-07-13 22:33 ` Matt Brown
2017-07-24 0:58 ` Casey Schaufler
2017-07-24 0:58 ` Casey Schaufler
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