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Groups > linux.kernel > #1578913

[PATCH v2 3/5] pci: set msi_domain_ops as __ro_after_init

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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@chromium.org>
Signed-off-by: Jess Frazelle <me@jessfraz.com>
---
 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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Thread

[PATCH v2 1/5] irq: set {msi_domain,syscore}_ops as __ro_after_init Jess Frazelle <me@jessfraz.com> - 2017-02-11 02:40 +0100
  [PATCH v2 5/5] x86: set msi_domain_ops as __ro_after_init Jess Frazelle <me@jessfraz.com> - 2017-02-11 02:40 +0100
  [PATCH v2 3/5] pci: set msi_domain_ops as __ro_after_init Jess Frazelle <me@jessfraz.com> - 2017-02-11 02:40 +0100
    RE: [PATCH v2 3/5] pci: set msi_domain_ops as __ro_after_init KY Srinivasan <kys@microsoft.com> - 2017-02-12 05:10 +0100
    Re: [PATCH v2 3/5] pci: set msi_domain_ops as __ro_after_init Keith Busch <keith.busch@intel.com> - 2017-02-13 19:10 +0100
  Re: [PATCH v2 1/5] irq: set {msi_domain,syscore}_ops as  __ro_after_init Thomas Gleixner <tglx@linutronix.de> - 2017-02-11 10:20 +0100
    Re: [PATCH v2 1/5] irq: set {msi_domain,syscore}_ops as  __ro_after_init Thomas Gleixner <tglx@linutronix.de> - 2017-02-11 10:30 +0100
    Re: [PATCH v2 1/5] irq: set {msi_domain,syscore}_ops as __ro_after_init Jess Frazelle <me@jessfraz.com> - 2017-02-11 11:50 +0100
      Re: [PATCH v2 1/5] irq: set {msi_domain,syscore}_ops as  __ro_after_init Thomas Gleixner <tglx@linutronix.de> - 2017-02-11 13:10 +0100
        Re: [PATCH v2 1/5] irq: set {msi_domain,syscore}_ops as __ro_after_init Jessica Frazelle <me@jessfraz.com> - 2017-02-11 13:20 +0100

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