From: Francesco Dolcini <francesco.dolcini@toradex.com>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: "Richard Zhu" <hongxing.zhu@nxp.com>,
"Lucas Stach" <l.stach@pengutronix.de>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Sascha Hauer" <s.hauer@pengutronix.de>,
"Pengutronix Kernel Team" <kernel@pengutronix.de>,
"Fabio Estevam" <festevam@gmail.com>,
"NXP Linux Team" <linux-imx@nxp.com>,
"Jason Liu" <jason.hui.liu@nxp.com>,
linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Shawn Guo" <shawnguo@kernel.org>,
"Francesco Dolcini" <francesco.dolcini@toradex.com>
Subject: Re: [PATCH v1] PCI: imx6: Handle the abort from user-space
Date: Thu, 10 Feb 2022 09:00:50 +0100 [thread overview]
Message-ID: <20220210080050.GA7275@francesco-nb.int.toradex.com> (raw)
In-Reply-To: <20220131075235.787432-1-francesco.dolcini@toradex.com>
Hello Lorenzo,
just a gently ping on this patch.
Francesco
On Mon, Jan 31, 2022 at 08:52:35AM +0100, Francesco Dolcini wrote:
> From: Jason Liu <jason.hui.liu@nxp.com>
>
> The driver install one hook to handle the external abort, but issue
> is that if the abort introduced from user space code, the following
> code unsigned long instr = *(unsigned long *)pc; which will created
> another data-abort(page domain fault) if CONFIG_CPU_SW_DOMAIN_PAN.
>
> The patch does not intent to use copy_from_user and then do the hack
> due to the security consideration. In fact, we can just return and
> report the external abort to user-space.
>
> Link: https://lore.kernel.org/all/20220128082920.591115-1-francesco.dolcini@toradex.com
> Signed-off-by: Jason Liu <jason.hui.liu@nxp.com>
> Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
> Acked-by: Lucas Stach <l.stach@pengutronix.de>
next prev parent reply other threads:[~2022-02-10 8:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-31 7:52 [PATCH v1] PCI: imx6: Handle the abort from user-space Francesco Dolcini
2022-02-10 8:00 ` Francesco Dolcini [this message]
2022-02-23 13:00 ` Lorenzo Pieralisi
2022-02-23 17:46 ` Francesco Dolcini
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