From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Sasha Levin <sasha.levin@oracle.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Dave Jones <davej@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
Pavel Emelyanov <xemul@parallels.com>
Subject: Re: mm: NULL ptr deref handling mmaping of special mappings
Date: Fri, 16 May 2014 01:31:24 +0400 [thread overview]
Message-ID: <20140515213124.GT28328@moon> (raw)
In-Reply-To: <20140515201914.GS28328@moon>
On Fri, May 16, 2014 at 12:19:14AM +0400, Cyrill Gorcunov wrote:
>
> I see what you mean. We're rather targeting on bare x86-64 at the moment
> but compat mode is needed as well (not yet implemented though). I'll take
> a precise look into this area. Thanks!
Indeed, because we were not running 32bit tasks vdso32-setup.c::arch_setup_additional_pages
has never been called. That's the mode we will have to implement one day.
Looking forward the question appear -- will VDSO_PREV_PAGES and rest of variables
be kind of immutable constants? If yes, we could calculate where the additional
vma lives without requiring any kind of [vdso] mark in proc/pid/maps output.
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WARNING: multiple messages have this Message-ID (diff)
From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Sasha Levin <sasha.levin@oracle.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Dave Jones <davej@redhat.com>,
LKML <linux-kernel@vger.kernel.org>,
Pavel Emelyanov <xemul@parallels.com>
Subject: Re: mm: NULL ptr deref handling mmaping of special mappings
Date: Fri, 16 May 2014 01:31:24 +0400 [thread overview]
Message-ID: <20140515213124.GT28328@moon> (raw)
In-Reply-To: <20140515201914.GS28328@moon>
On Fri, May 16, 2014 at 12:19:14AM +0400, Cyrill Gorcunov wrote:
>
> I see what you mean. We're rather targeting on bare x86-64 at the moment
> but compat mode is needed as well (not yet implemented though). I'll take
> a precise look into this area. Thanks!
Indeed, because we were not running 32bit tasks vdso32-setup.c::arch_setup_additional_pages
has never been called. That's the mode we will have to implement one day.
Looking forward the question appear -- will VDSO_PREV_PAGES and rest of variables
be kind of immutable constants? If yes, we could calculate where the additional
vma lives without requiring any kind of [vdso] mark in proc/pid/maps output.
next prev parent reply other threads:[~2014-05-15 21:31 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-14 15:55 mm: NULL ptr deref handling mmaping of special mappings Sasha Levin
2014-05-14 15:55 ` Sasha Levin
2014-05-14 20:23 ` Andrew Morton
2014-05-14 20:23 ` Andrew Morton
2014-05-14 20:41 ` Sasha Levin
2014-05-14 20:41 ` Sasha Levin
2014-05-14 21:03 ` Andrew Morton
2014-05-14 21:03 ` Andrew Morton
2014-05-14 21:11 ` Sasha Levin
2014-05-14 21:11 ` Sasha Levin
2014-05-14 21:31 ` Andrew Morton
2014-05-14 21:31 ` Andrew Morton
2014-05-14 21:33 ` Andy Lutomirski
2014-05-14 21:33 ` Andy Lutomirski
2014-05-14 22:11 ` Cyrill Gorcunov
2014-05-14 22:11 ` Cyrill Gorcunov
2014-05-14 22:23 ` Andy Lutomirski
2014-05-14 22:23 ` Andy Lutomirski
2014-05-15 2:36 ` Pavel Emelyanov
2014-05-15 2:36 ` Pavel Emelyanov
2014-05-15 19:42 ` Andy Lutomirski
2014-05-15 19:42 ` Andy Lutomirski
2014-05-19 8:27 ` Pavel Emelyanov
2014-05-19 8:27 ` Pavel Emelyanov
2014-05-19 8:40 ` Cyrill Gorcunov
2014-05-19 8:40 ` Cyrill Gorcunov
2014-05-15 8:45 ` Cyrill Gorcunov
2014-05-15 8:45 ` Cyrill Gorcunov
2014-05-15 19:46 ` Andy Lutomirski
2014-05-15 19:46 ` Andy Lutomirski
2014-05-15 19:53 ` Cyrill Gorcunov
2014-05-15 19:53 ` Cyrill Gorcunov
2014-05-15 19:59 ` Andy Lutomirski
2014-05-15 19:59 ` Andy Lutomirski
2014-05-15 20:19 ` Cyrill Gorcunov
2014-05-15 20:19 ` Cyrill Gorcunov
2014-05-15 21:31 ` Cyrill Gorcunov [this message]
2014-05-15 21:31 ` Cyrill Gorcunov
2014-05-15 21:42 ` Andy Lutomirski
2014-05-15 21:42 ` Andy Lutomirski
2014-05-15 21:57 ` Cyrill Gorcunov
2014-05-15 21:57 ` Cyrill Gorcunov
2014-05-15 22:15 ` Andy Lutomirski
2014-05-15 22:15 ` Andy Lutomirski
2014-05-16 22:40 ` Andy Lutomirski
2014-05-16 22:40 ` Andy Lutomirski
2014-05-16 22:56 ` H. Peter Anvin
2014-05-16 22:56 ` H. Peter Anvin
2014-05-16 23:10 ` Andy Lutomirski
2014-05-17 6:15 ` Cyrill Gorcunov
2014-05-17 6:15 ` Cyrill Gorcunov
2014-05-14 22:51 ` Andy Lutomirski
2014-05-14 22:51 ` Andy Lutomirski
2014-05-14 21:26 ` Andy Lutomirski
2014-05-14 21:26 ` Andy Lutomirski
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