From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Nadia Yvette Chambers <nyc@holomorphy.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Matthew Wilcox <willy@linux.intel.com>
Subject: RE: [PATCH] x86, mm: get ASLR work for hugetlb mappings
Date: Mon, 4 Nov 2013 12:41:52 +0200 (EET) [thread overview]
Message-ID: <20131104104152.72F91E0090@blue.fi.intel.com> (raw)
In-Reply-To: <1382449940-24357-1-git-send-email-kirill.shutemov@linux.intel.com>
Kirill A. Shutemov wrote:
> Matthew noticed that hugetlb doesn't participate in ASLR on x86-64.
> The reason is genereic hugetlb_get_unmapped_area() which is used on
> x86-64. It doesn't support randomization and use bottom-up unmapped area
> lookup, instead of usual top-down on x86-64.
>
> x86 has arch-specific hugetlb_get_unmapped_area(), but it's used only on
> x86-32.
>
> Let's use arch-specific hugetlb_get_unmapped_area() on x86-64 too.
> It fixes the issue and make hugetlb use top-down unmapped area lookup.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Matthew Wilcox <willy@linux.intel.com>
Andrew, any comments?
--
Kirill A. Shutemov
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WARNING: multiple messages have this Message-ID (diff)
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Nadia Yvette Chambers <nyc@holomorphy.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Matthew Wilcox <willy@linux.intel.com>
Subject: RE: [PATCH] x86, mm: get ASLR work for hugetlb mappings
Date: Mon, 4 Nov 2013 12:41:52 +0200 (EET) [thread overview]
Message-ID: <20131104104152.72F91E0090@blue.fi.intel.com> (raw)
In-Reply-To: <1382449940-24357-1-git-send-email-kirill.shutemov@linux.intel.com>
Kirill A. Shutemov wrote:
> Matthew noticed that hugetlb doesn't participate in ASLR on x86-64.
> The reason is genereic hugetlb_get_unmapped_area() which is used on
> x86-64. It doesn't support randomization and use bottom-up unmapped area
> lookup, instead of usual top-down on x86-64.
>
> x86 has arch-specific hugetlb_get_unmapped_area(), but it's used only on
> x86-32.
>
> Let's use arch-specific hugetlb_get_unmapped_area() on x86-64 too.
> It fixes the issue and make hugetlb use top-down unmapped area lookup.
>
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Matthew Wilcox <willy@linux.intel.com>
Andrew, any comments?
--
Kirill A. Shutemov
next prev parent reply other threads:[~2013-11-04 10:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-22 13:52 [PATCH] x86, mm: get ASLR work for hugetlb mappings Kirill A. Shutemov
2013-10-22 13:52 ` Kirill A. Shutemov
2013-10-22 15:21 ` Dave Hansen
2013-10-22 15:21 ` Dave Hansen
2013-10-22 17:52 ` Kirill A. Shutemov
2013-10-22 17:52 ` Kirill A. Shutemov
2013-11-04 10:41 ` Kirill A. Shutemov [this message]
2013-11-04 10:41 ` Kirill A. Shutemov
2013-11-04 21:09 ` Andrew Morton
2013-11-04 21:09 ` Andrew Morton
2013-11-11 13:45 ` Kirill A. Shutemov
2013-11-11 13:45 ` Kirill A. Shutemov
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