From: Andrey Konovalov <andreyknvl@google.com>
To: Robin Murphy <robin.murphy@arm.com>
Cc: linux-mips@linux-mips.org, linux-sh@vger.kernel.org,
Lee Smith <Lee.Smith@arm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Will Deacon <will.deacon@arm.com>,
Paul Mackerras <paulus@samba.org>, Shaohua Li <shli@fb.com>,
linux-arch@vger.kernel.org, Jacob Bramley <Jacob.Bramley@arm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
"James E . J . Bottomley" <jejb@parisc-linux.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Matt Turner <mattst88@gmail.com>,
Evgeniy Stepanov <eugenis@google.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
adi-buildroot-devel@lists.sourceforge.net,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>,
Richard Henderson <rth@twiddle.net>,
linux-cris-kernel@axis.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
LKML <linux-kernel
Subject: Re: [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel
Date: Fri, 9 Mar 2018 18:58:00 +0100 [thread overview]
Message-ID: <CAAeHK+xTEp-jcMDxNK4kCKcNtVbu4s4VXxzThsKMMFaTdBv0RQ@mail.gmail.com> (raw)
In-Reply-To: <963e112a-88a0-94bc-e6eb-0e9f9a6ee14a@arm.com>
On Fri, Mar 9, 2018 at 3:15 PM, Robin Murphy <robin.murphy@arm.com> wrote:
> Hi Andrey,
>
> On 09/03/18 14:01, Andrey Konovalov wrote:
>>
>> arm64 has a feature called Top Byte Ignore, which allows to embed pointer
>> tags into the top byte of each pointer. Userspace programs (such as
>> HWASan, a memory debugging tool [1]) might use this feature and pass
>> tagged user pointers to the kernel through syscalls or other interfaces.
>
>
> If you propose changing the ABI, then
> Documentation/arm64/tagged-pointers.txt needs to reflect the new one, since
> passing nonzero tags via syscalls is currently explicitly forbidden.
>
> Robin.
Hi Robin!
I will include changes to Documentation/arm64/tagged-pointers.txt in
the next version.
Thanks!
WARNING: multiple messages have this Message-ID (diff)
From: Andrey Konovalov <andreyknvl@google.com>
To: Robin Murphy <robin.murphy@arm.com>
Cc: "Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will.deacon@arm.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Al Viro" <viro@zeniv.linux.org.uk>,
"Philippe Ombredanne" <pombredanne@nexb.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Kate Stewart" <kstewart@linuxfoundation.org>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
"Ingo Molnar" <mingo@kernel.org>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.vnet.ibm.com>,
"Minchan Kim" <minchan@kernel.org>,
"Michal Hocko" <mhocko@suse.com>, "Shaohua Li" <shli@fb.com>,
"Andrea Arcangeli" <aarcange@redhat.com>,
"Anshuman Khandual" <khandual@linux.vnet.ibm.com>,
"Mike Rapoport" <rppt@linux.vnet.ibm.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Naoya Horiguchi" <n-horiguchi@ah.jp.nec.com>,
"Shakeel Butt" <shakeelb@google.com>,
"Joonsoo Kim" <iamjoonsoo.kim@lge.com>,
"Hugh Dickins" <hughd@google.com>,
"Mel Gorman" <mgorman@techsingularity.net>,
"Jérôme Glisse" <jglisse@redhat.com>,
"Mike Kravetz" <mike.kravetz@oracle.com>,
"Zi Yan" <zi.yan@cs.rutgers.edu>,
"Linux ARM" <linux-arm-kernel@lists.infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
"Linux Memory Management List" <linux-mm@kvack.org>,
"Richard Henderson" <rth@twiddle.net>,
"Ivan Kokshaysky" <ink@jurassic.park.msu.ru>,
"Matt Turner" <mattst88@gmail.com>,
"Vineet Gupta" <vgupta@synopsys.com>,
"Russell King" <linux@armlinux.org.uk>,
"Mark Salter" <msalter@redhat.com>,
"Aurelien Jacquiot" <jacquiot.aurelien@gmail.com>,
"Mikael Starvik" <starvik@axis.com>,
"Jesper Nilsson" <jesper.nilsson@axis.com>,
"Tony Luck" <tony.luck@intel.com>,
"Fenghua Yu" <fenghua.yu@intel.com>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
"James Hogan" <jhogan@kernel.org>,
"Michal Simek" <monstr@monstr.eu>,
"Ralf Baechle" <ralf@linux-mips.org>,
"David Howells" <dhowells@redhat.com>,
"Ley Foon Tan" <lftan@altera.com>,
"Jonas Bonn" <jonas@southpole.se>,
"Stefan Kristiansson" <stefan.kristiansson@saunalahti.fi>,
"Stafford Horne" <shorne@gmail.com>,
"James E . J . Bottomley" <jejb@parisc-linux.org>,
"Helge Deller" <deller@gmx.de>,
"Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
"Paul Mackerras" <paulus@samba.org>,
"Michael Ellerman" <mpe@ellerman.id.au>,
"Palmer Dabbelt" <palmer@sifive.com>,
"Albert Ou" <albert@sifive.com>,
"Chen Liqin" <liqin.linux@gmail.com>,
"Lennox Wu" <lennox.wu@gmail.com>,
"Yoshinori Sato" <ysato@users.sourceforge.jp>,
"Rich Felker" <dalias@libc.org>,
"David S . Miller" <davem@davemloft.net>,
"Ingo Molnar" <mingo@redhat.com>,
"the arch/x86 maintainers" <x86@kernel.org>,
"Chris Zankel" <chris@zankel.net>,
"Max Filippov" <jcmvbkbc@gmail.com>,
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"Ramana Radhakrishnan" <Ramana.Radhakrishnan@arm.com>,
"Jacob Bramley" <Jacob.Bramley@arm.com>,
"Ruben Ayrapetyan" <Ruben.Ayrapetyan@arm.com>
Subject: Re: [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel
Date: Fri, 9 Mar 2018 18:58:00 +0100 [thread overview]
Message-ID: <CAAeHK+xTEp-jcMDxNK4kCKcNtVbu4s4VXxzThsKMMFaTdBv0RQ@mail.gmail.com> (raw)
In-Reply-To: <963e112a-88a0-94bc-e6eb-0e9f9a6ee14a@arm.com>
On Fri, Mar 9, 2018 at 3:15 PM, Robin Murphy <robin.murphy@arm.com> wrote:
> Hi Andrey,
>
> On 09/03/18 14:01, Andrey Konovalov wrote:
>>
>> arm64 has a feature called Top Byte Ignore, which allows to embed pointer
>> tags into the top byte of each pointer. Userspace programs (such as
>> HWASan, a memory debugging tool [1]) might use this feature and pass
>> tagged user pointers to the kernel through syscalls or other interfaces.
>
>
> If you propose changing the ABI, then
> Documentation/arm64/tagged-pointers.txt needs to reflect the new one, since
> passing nonzero tags via syscalls is currently explicitly forbidden.
>
> Robin.
Hi Robin!
I will include changes to Documentation/arm64/tagged-pointers.txt in
the next version.
Thanks!
WARNING: multiple messages have this Message-ID (diff)
From: Andrey Konovalov <andreyknvl@google.com>
To: Robin Murphy <robin.murphy@arm.com>
Cc: linux-mips@linux-mips.org, linux-sh@vger.kernel.org,
Lee Smith <Lee.Smith@arm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Will Deacon <will.deacon@arm.com>,
Paul Mackerras <paulus@samba.org>, Shaohua Li <shli@fb.com>,
linux-arch@vger.kernel.org, Jacob Bramley <Jacob.Bramley@arm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
"James E . J . Bottomley" <jejb@parisc-linux.org>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Matt Turner <mattst88@gmail.com>,
Evgeniy Stepanov <eugenis@google.com>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
adi-buildroot-devel@lists.sourceforge.net,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Thomas Gleixner <tglx@linutronix.de>,
Richard Henderson <rth@twiddle.net>,
linux-cris-kernel@axis.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
LKML <linux-kernel>
Subject: Re: [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel
Date: Fri, 9 Mar 2018 18:58:00 +0100 [thread overview]
Message-ID: <CAAeHK+xTEp-jcMDxNK4kCKcNtVbu4s4VXxzThsKMMFaTdBv0RQ@mail.gmail.com> (raw)
In-Reply-To: <963e112a-88a0-94bc-e6eb-0e9f9a6ee14a@arm.com>
On Fri, Mar 9, 2018 at 3:15 PM, Robin Murphy <robin.murphy@arm.com> wrote:
> Hi Andrey,
>
> On 09/03/18 14:01, Andrey Konovalov wrote:
>>
>> arm64 has a feature called Top Byte Ignore, which allows to embed pointer
>> tags into the top byte of each pointer. Userspace programs (such as
>> HWASan, a memory debugging tool [1]) might use this feature and pass
>> tagged user pointers to the kernel through syscalls or other interfaces.
>
>
> If you propose changing the ABI, then
> Documentation/arm64/tagged-pointers.txt needs to reflect the new one, since
> passing nonzero tags via syscalls is currently explicitly forbidden.
>
> Robin.
Hi Robin!
I will include changes to Documentation/arm64/tagged-pointers.txt in
the next version.
Thanks!
WARNING: multiple messages have this Message-ID (diff)
From: andreyknvl@google.com (Andrey Konovalov)
To: linux-riscv@lists.infradead.org
Subject: [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel
Date: Fri, 9 Mar 2018 18:58:00 +0100 [thread overview]
Message-ID: <CAAeHK+xTEp-jcMDxNK4kCKcNtVbu4s4VXxzThsKMMFaTdBv0RQ@mail.gmail.com> (raw)
In-Reply-To: <963e112a-88a0-94bc-e6eb-0e9f9a6ee14a@arm.com>
On Fri, Mar 9, 2018 at 3:15 PM, Robin Murphy <robin.murphy@arm.com> wrote:
> Hi Andrey,
>
> On 09/03/18 14:01, Andrey Konovalov wrote:
>>
>> arm64 has a feature called Top Byte Ignore, which allows to embed pointer
>> tags into the top byte of each pointer. Userspace programs (such as
>> HWASan, a memory debugging tool [1]) might use this feature and pass
>> tagged user pointers to the kernel through syscalls or other interfaces.
>
>
> If you propose changing the ABI, then
> Documentation/arm64/tagged-pointers.txt needs to reflect the new one, since
> passing nonzero tags via syscalls is currently explicitly forbidden.
>
> Robin.
Hi Robin!
I will include changes to Documentation/arm64/tagged-pointers.txt in
the next version.
Thanks!
WARNING: multiple messages have this Message-ID (diff)
From: andreyknvl@google.com (Andrey Konovalov)
To: linux-snps-arc@lists.infradead.org
Subject: [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel
Date: Fri, 9 Mar 2018 18:58:00 +0100 [thread overview]
Message-ID: <CAAeHK+xTEp-jcMDxNK4kCKcNtVbu4s4VXxzThsKMMFaTdBv0RQ@mail.gmail.com> (raw)
In-Reply-To: <963e112a-88a0-94bc-e6eb-0e9f9a6ee14a@arm.com>
On Fri, Mar 9, 2018@3:15 PM, Robin Murphy <robin.murphy@arm.com> wrote:
> Hi Andrey,
>
> On 09/03/18 14:01, Andrey Konovalov wrote:
>>
>> arm64 has a feature called Top Byte Ignore, which allows to embed pointer
>> tags into the top byte of each pointer. Userspace programs (such as
>> HWASan, a memory debugging tool [1]) might use this feature and pass
>> tagged user pointers to the kernel through syscalls or other interfaces.
>
>
> If you propose changing the ABI, then
> Documentation/arm64/tagged-pointers.txt needs to reflect the new one, since
> passing nonzero tags via syscalls is currently explicitly forbidden.
>
> Robin.
Hi Robin!
I will include changes to Documentation/arm64/tagged-pointers.txt in
the next version.
Thanks!
WARNING: multiple messages have this Message-ID (diff)
From: Andrey Konovalov <andreyknvl@google.com>
To: openrisc@lists.librecores.org
Subject: [OpenRISC] [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel
Date: Fri, 9 Mar 2018 18:58:00 +0100 [thread overview]
Message-ID: <CAAeHK+xTEp-jcMDxNK4kCKcNtVbu4s4VXxzThsKMMFaTdBv0RQ@mail.gmail.com> (raw)
In-Reply-To: <963e112a-88a0-94bc-e6eb-0e9f9a6ee14a@arm.com>
On Fri, Mar 9, 2018 at 3:15 PM, Robin Murphy <robin.murphy@arm.com> wrote:
> Hi Andrey,
>
> On 09/03/18 14:01, Andrey Konovalov wrote:
>>
>> arm64 has a feature called Top Byte Ignore, which allows to embed pointer
>> tags into the top byte of each pointer. Userspace programs (such as
>> HWASan, a memory debugging tool [1]) might use this feature and pass
>> tagged user pointers to the kernel through syscalls or other interfaces.
>
>
> If you propose changing the ABI, then
> Documentation/arm64/tagged-pointers.txt needs to reflect the new one, since
> passing nonzero tags via syscalls is currently explicitly forbidden.
>
> Robin.
Hi Robin!
I will include changes to Documentation/arm64/tagged-pointers.txt in
the next version.
Thanks!
next prev parent reply other threads:[~2018-03-09 17:58 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-09 14:01 [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel Andrey Konovalov
2018-03-09 14:01 ` [OpenRISC] " Andrey Konovalov
2018-03-09 14:01 ` Andrey Konovalov
2018-03-09 14:01 ` Andrey Konovalov
2018-03-09 14:01 ` [RFC PATCH 1/6] arm64: add type casts to untagged_addr macro Andrey Konovalov
2018-03-09 14:01 ` [OpenRISC] " Andrey Konovalov
2018-03-09 14:01 ` Andrey Konovalov
2018-03-09 14:01 ` Andrey Konovalov
2018-03-09 14:02 ` [RFC PATCH 2/6] arm64: untag user addresses in copy_from_user and others Andrey Konovalov
2018-03-09 14:02 ` [OpenRISC] " Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 15:03 ` Mark Rutland
2018-03-09 15:03 ` Mark Rutland
2018-03-09 15:58 ` Catalin Marinas
2018-03-09 15:58 ` Catalin Marinas
2018-03-09 15:58 ` Catalin Marinas
2018-03-09 15:58 ` Catalin Marinas
2018-03-09 17:57 ` Andrey Konovalov
2018-03-09 17:57 ` Andrey Konovalov
2018-03-09 14:02 ` [RFC PATCH 3/6] mm, arm64: untag user addresses in memory syscalls Andrey Konovalov
2018-03-09 14:02 ` [OpenRISC] " Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 15:53 ` Catalin Marinas
2018-03-09 15:53 ` Catalin Marinas
2018-03-09 17:31 ` Andrey Konovalov
2018-03-09 17:31 ` Andrey Konovalov
2018-03-09 17:42 ` Evgenii Stepanov
2018-03-09 17:42 ` Evgenii Stepanov
2018-03-14 15:45 ` Andrey Konovalov
2018-03-14 15:45 ` Andrey Konovalov
2018-03-14 17:44 ` Catalin Marinas
2018-03-14 17:44 ` Catalin Marinas
2018-03-16 1:11 ` Evgenii Stepanov
2018-03-16 1:11 ` Evgenii Stepanov
2018-03-09 14:02 ` [RFC PATCH 4/6] mm, arm64: untag user addresses in mm/gup.c Andrey Konovalov
2018-03-09 14:02 ` [OpenRISC] " Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:02 ` [RFC PATCH 5/6] lib, arm64: untag addrs passed to strncpy_from_user and strnlen_user Andrey Konovalov
2018-03-09 14:02 ` [OpenRISC] " Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:02 ` [RFC PATCH 6/6] arch: add untagged_addr definition for other arches Andrey Konovalov
2018-03-09 14:02 ` [OpenRISC] " Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:02 ` Andrey Konovalov
2018-03-09 14:11 ` Arnd Bergmann
2018-03-09 14:11 ` [OpenRISC] " Arnd Bergmann
2018-03-09 14:11 ` Arnd Bergmann
2018-03-09 14:11 ` Arnd Bergmann
2018-03-09 14:11 ` Arnd Bergmann
2018-03-09 14:11 ` Arnd Bergmann
2018-03-09 14:16 ` Robin Murphy
2018-03-09 14:16 ` [OpenRISC] " Robin Murphy
2018-03-09 14:16 ` Robin Murphy
2018-03-09 14:16 ` Robin Murphy
2018-03-09 15:47 ` Andrey Konovalov
2018-03-09 15:47 ` [OpenRISC] " Andrey Konovalov
2018-03-09 15:47 ` Andrey Konovalov
2018-03-09 15:47 ` Andrey Konovalov
2018-03-09 15:47 ` Andrey Konovalov
2018-03-09 15:47 ` Andrey Konovalov
2018-03-09 14:15 ` [RFC PATCH 0/6] arm64: untag user pointers passed to the kernel Robin Murphy
2018-03-09 14:15 ` [OpenRISC] " Robin Murphy
2018-03-09 14:15 ` Robin Murphy
2018-03-09 14:15 ` Robin Murphy
2018-03-09 17:58 ` Andrey Konovalov [this message]
2018-03-09 17:58 ` [OpenRISC] " Andrey Konovalov
2018-03-09 17:58 ` Andrey Konovalov
2018-03-09 17:58 ` Andrey Konovalov
2018-03-09 17:58 ` Andrey Konovalov
2018-03-09 17:58 ` Andrey Konovalov
2018-03-09 14:55 ` Mark Rutland
2018-03-09 14:55 ` Mark Rutland
2018-03-09 15:16 ` Geert Uytterhoeven
2018-03-09 15:16 ` Geert Uytterhoeven
2018-03-09 17:58 ` Andrey Konovalov
2018-03-09 17:58 ` Andrey Konovalov
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