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From: "Song Bao Hua (Barry Song)" <song.bao.hua@hisilicon.com>
To: Jonathan Cameron <jonathan.cameron@huawei.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"x86@kernel.org" <x86@kernel.org>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"martin@geanix.com" <martin@geanix.com>,
	"Ingo Molnar" <mingo@redhat.com>,
	"linux-ia64@vger.kernel.org" <linux-ia64@vger.kernel.org>,
	Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Linuxarm <linuxarm@huawei.com>,
	Dan Williams <dan.j.williams@intel.com>
Subject: RE: [PATCH v2 1/6] ACPI: Add out of bounds and numa_off protections to pxm_to_node
Date: Sat, 18 Jul 2020 05:09:16 +0000
Message-ID: <B926444035E5E2439431908E3842AFD2593D39@DGGEMI525-MBS.china.huawei.com> (raw)
In-Reply-To: <20200717175959.899775-2-Jonathan.Cameron@huawei.com>



> -----Original Message-----
> From: Jonathan Cameron
> Sent: Saturday, July 18, 2020 6:00 AM
> To: linux-mm@kvack.org; linux-acpi@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; x86@kernel.org
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>; Bjorn Helgaas
> <bhelgaas@google.com>; linux-pci@vger.kernel.org; martin@geanix.com; Ingo
> Molnar <mingo@redhat.com>; linux-ia64@vger.kernel.org; Tony Luck
> <tony.luck@intel.com>; Fenghua Yu <fenghua.yu@intel.com>; Thomas
> Gleixner <tglx@linutronix.de>; Linuxarm <linuxarm@huawei.com>; Dan
> Williams <dan.j.williams@intel.com>; Song Bao Hua (Barry Song)
> <song.bao.hua@hisilicon.com>; Jonathan Cameron
> <jonathan.cameron@huawei.com>
> Subject: [PATCH v2 1/6] ACPI: Add out of bounds and numa_off protections to
> pxm_to_node
> 
> The function should check the validity of the pxm value before using
> it to index the pxm_to_node_map array.
> 
> Whilst hardening this code may be good in general, the main intent
> here is to enable following patches that use this function to replace
> acpi_map_pxm_to_node for non SRAT usecases which should return
> NO_NUMA_NODE for PXM entries not matching with those in SRAT.
> 
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Reviewed-by: Barry Song <song.bao.hua@hisilicon.com>

> ---
>  drivers/acpi/numa/srat.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c
> index 5be5a977da1b..8ef44ee0d76b 100644
> --- a/drivers/acpi/numa/srat.c
> +++ b/drivers/acpi/numa/srat.c
> @@ -31,7 +31,7 @@ int acpi_numa __initdata;
> 
>  int pxm_to_node(int pxm)
>  {
> -	if (pxm < 0)
> +	if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
>  		return NUMA_NO_NODE;
>  	return pxm_to_node_map[pxm];
>  }
> --
> 2.19.1


  reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-17 17:59 [PATCH v2 0/6] ACPI: Only create NUMA nodes from entries in SRAT or SRAT emulation Jonathan Cameron
2020-07-17 17:59 ` [PATCH v2 1/6] ACPI: Add out of bounds and numa_off protections to pxm_to_node Jonathan Cameron
2020-07-18  5:09   ` Song Bao Hua (Barry Song) [this message]
2020-07-17 17:59 ` [PATCH v2 2/6] ACPI: Do not create new NUMA domains from ACPI static tables that are not SRAT Jonathan Cameron
2020-07-18  5:14   ` Song Bao Hua (Barry Song)
2020-07-17 17:59 ` [PATCH v2 3/6] ACPI: Remove side effect of partly creating a node in acpi_map_pxm_to_online_node Jonathan Cameron
2020-07-17 17:59 ` [PATCH v2 4/6] ACPI: Rename acpi_map_pxm_to_online_node to pxm_to_online_node Jonathan Cameron
2020-07-17 17:59 ` [PATCH v2 5/6] ACPI: Remove side effect of partly creating a node in acpi_get_node Jonathan Cameron
2020-07-18  5:17   ` Song Bao Hua (Barry Song)
2020-07-17 17:59 ` [PATCH v2 6/6] irq-chip/gic-v3-its: Fix crash if ITS is in a proximity domain without processor or memory Jonathan Cameron
2020-07-20  2:02 ` [PATCH v2 0/6] ACPI: Only create NUMA nodes from entries in SRAT or SRAT emulation Hanjun Guo
2020-07-28 16:20 ` Jonathan Cameron

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