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Date: Sun, 12 Feb 2017 04:08:24 +0000
From: KY Srinivasan <kys@...rosoft.com>
To: Jess Frazelle <me@...sfraz.com>, Haiyang Zhang <haiyangz@...rosoft.com>,
Stephen Hemminger <sthemmin@...rosoft.com>, Bjorn Helgaas
<bhelgaas@...gle.com>, Keith Busch <keith.busch@...el.com>, "open
list:Hyper-V CORE AND DRIVERS" <devel@...uxdriverproject.org>, "open list:PCI
SUBSYSTEM" <linux-pci@...r.kernel.org>, open list
<linux-kernel@...r.kernel.org>
CC: "kernel-hardening@...ts.openwall.com"
<kernel-hardening@...ts.openwall.com>
Subject: RE: [PATCH v2 3/5] pci: set msi_domain_ops as __ro_after_init
> -----Original Message-----
> From: Jess Frazelle [mailto:me@...sfraz.com]
> Sent: Friday, February 10, 2017 5:38 PM
> To: KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Stephen Hemminger
> <sthemmin@...rosoft.com>; Bjorn Helgaas <bhelgaas@...gle.com>; Keith
> Busch <keith.busch@...el.com>; open list:Hyper-V CORE AND DRIVERS
> <devel@...uxdriverproject.org>; open list:PCI SUBSYSTEM <linux-
> pci@...r.kernel.org>; open list <linux-kernel@...r.kernel.org>
> Cc: kernel-hardening@...ts.openwall.com; Jess Frazelle <me@...sfraz.com>
> Subject: [PATCH v2 3/5] pci: set msi_domain_ops as __ro_after_init
>
> Marked msi_domain_ops structs as __ro_after_init when called only during
> init.
> This protects the data structure from accidental corruption.
>
> Suggested-by: Kees Cook <keescook@...omium.org>
> Signed-off-by: Jess Frazelle <me@...sfraz.com>
Acked-by: K. Y. Srinivasan <kys@...rosoft.com>
K. Y
> ---
> drivers/pci/host/pci-hyperv.c | 2 +-
> drivers/pci/host/vmd.c | 2 +-
> drivers/pci/msi.c | 2 +-
> 3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c
> index 3efcc7bdc5fb..f05b93689d8f 100644
> --- a/drivers/pci/host/pci-hyperv.c
> +++ b/drivers/pci/host/pci-hyperv.c
> @@ -958,7 +958,7 @@ static irq_hw_number_t
> hv_msi_domain_ops_get_hwirq(struct msi_domain_info *info,
> return arg->msi_hwirq;
> }
>
> -static struct msi_domain_ops hv_msi_ops = {
> +static struct msi_domain_ops hv_msi_ops __ro_after_init = {
> .get_hwirq = hv_msi_domain_ops_get_hwirq,
> .msi_prepare = pci_msi_prepare,
> .set_desc = pci_msi_set_desc,
> diff --git a/drivers/pci/host/vmd.c b/drivers/pci/host/vmd.c
> index 18ef1a93c10a..152c461538e4 100644
> --- a/drivers/pci/host/vmd.c
> +++ b/drivers/pci/host/vmd.c
> @@ -253,7 +253,7 @@ static void vmd_set_desc(msi_alloc_info_t *arg,
> struct msi_desc *desc)
> arg->desc = desc;
> }
>
> -static struct msi_domain_ops vmd_msi_domain_ops = {
> +static struct msi_domain_ops vmd_msi_domain_ops __ro_after_init = {
> .get_hwirq = vmd_get_hwirq,
> .msi_init = vmd_msi_init,
> .msi_free = vmd_msi_free,
> diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
> index 50c5003295ca..93141d5e2d1c 100644
> --- a/drivers/pci/msi.c
> +++ b/drivers/pci/msi.c
> @@ -1413,7 +1413,7 @@ static void
> pci_msi_domain_set_desc(msi_alloc_info_t *arg,
> #define pci_msi_domain_set_desc NULL
> #endif
>
> -static struct msi_domain_ops pci_msi_domain_ops_default = {
> +static struct msi_domain_ops pci_msi_domain_ops_default __ro_after_init
> = {
> .set_desc = pci_msi_domain_set_desc,
> .msi_check = pci_msi_domain_check_cap,
> .handle_error = pci_msi_domain_handle_error,
> --
> 2.11.0
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