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Reply-To: monstr@monstr.eu
Subject: Re: [PATCH 2/2] ARM: zynq: Use memcpy_toio instead of memcpy on smp
 bring-up
To:     Luis Araneda <luaraneda@gmail.com>,
        Michal Simek <michal.simek@xilinx.com>
Cc:     Russell King <linux@armlinux.org.uk>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        linux-kernel@vger.kernel.org
References: <20190806030718.29048-1-luaraneda@gmail.com>
 <20190806030718.29048-3-luaraneda@gmail.com>
 <194fe121-151d-0b64-b83e-e4d82c02efa7@xilinx.com>
 <CAHbBuxpM8YKxADGJv2PAPbyS-2FZ6xiwohJwGJ1DMPuGnDV-Jg@mail.gmail.com>
From:   Michal Simek <monstr@monstr.eu>
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Message-ID: <d28323de-6751-0a11-4790-f814539f536f@monstr.eu>
Date:   Thu, 8 Aug 2019 11:19:46 +0200
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In-Reply-To: <CAHbBuxpM8YKxADGJv2PAPbyS-2FZ6xiwohJwGJ1DMPuGnDV-Jg@mail.gmail.com>
Content-Type: multipart/signed; micalg=pgp-sha1;
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 boundary="3VHn5xLLkhWU4W6I4NCgesZwfMtJ2CRpi"
Sender: linux-kernel-owner@vger.kernel.org
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--3VHn5xLLkhWU4W6I4NCgesZwfMtJ2CRpi
Content-Type: multipart/mixed; boundary="DGNIAlcoa3GStLL3YWKXJKhs2omylnh0X";
 protected-headers="v1"
From: Michal Simek <monstr@monstr.eu>
Reply-To: monstr@monstr.eu
To: Luis Araneda <luaraneda@gmail.com>, Michal Simek <michal.simek@xilinx.com>
Cc: Russell King <linux@armlinux.org.uk>,
 linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
 linux-kernel@vger.kernel.org
Message-ID: <d28323de-6751-0a11-4790-f814539f536f@monstr.eu>
Subject: Re: [PATCH 2/2] ARM: zynq: Use memcpy_toio instead of memcpy on smp
 bring-up
References: <20190806030718.29048-1-luaraneda@gmail.com>
 <20190806030718.29048-3-luaraneda@gmail.com>
 <194fe121-151d-0b64-b83e-e4d82c02efa7@xilinx.com>
 <CAHbBuxpM8YKxADGJv2PAPbyS-2FZ6xiwohJwGJ1DMPuGnDV-Jg@mail.gmail.com>
In-Reply-To: <CAHbBuxpM8YKxADGJv2PAPbyS-2FZ6xiwohJwGJ1DMPuGnDV-Jg@mail.gmail.com>

--DGNIAlcoa3GStLL3YWKXJKhs2omylnh0X
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: quoted-printable

On 06. 08. 19 14:49, Luis Araneda wrote:
> Hi Michal,
>=20
> On Tue, Aug 6, 2019 at 2:42 AM Michal Simek <michal.simek@xilinx.com> w=
rote:
>> On 06. 08. 19 5:07, Luis Araneda wrote:
>>> This fixes a kernel panic (read overflow) on memcpy when
>>> FORTIFY_SOURCE is enabled.
>>>
>>> The computed size of memcpy args are:
>>> - p_size (dst): 4294967295 =3D (size_t) -1
>>> - q_size (src): 1
>>> - size (len): 8
>>>
>>> Additionally, the memory is marked as __iomem, so one of
>>> the memcpy_* functions should be used for read/write
>>>
>>> Signed-off-by: Luis Araneda <luaraneda@gmail.com>
> [...]
>> I would consider this one as stable material. Please also add there li=
nk
>> to the patch which this patch fixes.
>=20
> I'm dropping stable CC (for now), as I'm not sure I completely
> understood the process for inclusion in stable trees.
> Do I have to wait for the patch to be on Linus' tree before CCing stabl=
e?

just put Cc: to commit message and they will pick it up.

>=20
> As for the link which this patch fixes, you mean
> aa7eb2bb4e4a22e41bbe4612ff46e5885b13c33e (arm: zynq: Add smp support)?
> where you added SMP support for zynq.

yes but make sha1 only 12char long.

M

--=20
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs


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