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authorSami Tolvanen <samitolvanen@google.com>2020-11-13 10:31:26 -0800
committerPeter Zijlstra <peterz@infradead.org>2020-11-17 13:15:38 +0100
commitebd19fc372e3e78bf165f230e7c084e304441c08 (patch)
tree1457a5636b1f6f0ed0fca74b32029024b647ff2e /arch/x86/events
parent1a8cfa24e21c2f154791f0cdd85fc28496918722 (diff)
perf/x86: fix sysfs type mismatches
This change switches rapl to use PMU_FORMAT_ATTR, and fixes two other macros to use device_attribute instead of kobj_attribute to avoid callback type mismatches that trip indirect call checking with Clang's Control-Flow Integrity (CFI). Reported-by: Sedat Dilek <sedat.dilek@gmail.com> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lkml.kernel.org/r/20201113183126.1239404-1-samitolvanen@google.com
Diffstat (limited to 'arch/x86/events')
-rw-r--r--arch/x86/events/intel/cstate.c6
-rw-r--r--arch/x86/events/intel/uncore.c4
-rw-r--r--arch/x86/events/intel/uncore.h12
-rw-r--r--arch/x86/events/rapl.c14
4 files changed, 12 insertions, 24 deletions
diff --git a/arch/x86/events/intel/cstate.c b/arch/x86/events/intel/cstate.c
index 442e1ed4acd4..4eb7ee5fed72 100644
--- a/arch/x86/events/intel/cstate.c
+++ b/arch/x86/events/intel/cstate.c
@@ -107,14 +107,14 @@
MODULE_LICENSE("GPL");
#define DEFINE_CSTATE_FORMAT_ATTR(_var, _name, _format) \
-static ssize_t __cstate_##_var##_show(struct kobject *kobj, \
- struct kobj_attribute *attr, \
+static ssize_t __cstate_##_var##_show(struct device *dev, \
+ struct device_attribute *attr, \
char *page) \
{ \
BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
return sprintf(page, _format "\n"); \
} \
-static struct kobj_attribute format_attr_##_var = \
+static struct device_attribute format_attr_##_var = \
__ATTR(_name, 0444, __cstate_##_var##_show, NULL)
static ssize_t cstate_get_attr_cpumask(struct device *dev,
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 86d012b3e0b4..80d52cbe2fde 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -94,8 +94,8 @@ end:
return map;
}
-ssize_t uncore_event_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
+ssize_t uncore_event_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct uncore_event_desc *event =
container_of(attr, struct uncore_event_desc, attr);
diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h
index 83d2a7d490e0..9efea154349d 100644
--- a/arch/x86/events/intel/uncore.h
+++ b/arch/x86/events/intel/uncore.h
@@ -157,7 +157,7 @@ struct intel_uncore_box {
#define UNCORE_BOX_FLAG_CFL8_CBOX_MSR_OFFS 2
struct uncore_event_desc {
- struct kobj_attribute attr;
+ struct device_attribute attr;
const char *config;
};
@@ -179,8 +179,8 @@ struct pci2phy_map {
struct pci2phy_map *__find_pci2phy_map(int segment);
int uncore_pcibus_to_physid(struct pci_bus *bus);
-ssize_t uncore_event_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf);
+ssize_t uncore_event_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
static inline struct intel_uncore_pmu *dev_to_uncore_pmu(struct device *dev)
{
@@ -201,14 +201,14 @@ extern int __uncore_max_dies;
}
#define DEFINE_UNCORE_FORMAT_ATTR(_var, _name, _format) \
-static ssize_t __uncore_##_var##_show(struct kobject *kobj, \
- struct kobj_attribute *attr, \
+static ssize_t __uncore_##_var##_show(struct device *dev, \
+ struct device_attribute *attr, \
char *page) \
{ \
BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
return sprintf(page, _format "\n"); \
} \
-static struct kobj_attribute format_attr_##_var = \
+static struct device_attribute format_attr_##_var = \
__ATTR(_name, 0444, __uncore_##_var##_show, NULL)
static inline bool uncore_pmc_fixed(int idx)
diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index 7c0120e2e957..7dbbeaacd995 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -93,18 +93,6 @@ static const char *const rapl_domain_names[NR_RAPL_DOMAINS] __initconst = {
* any other bit is reserved
*/
#define RAPL_EVENT_MASK 0xFFULL
-
-#define DEFINE_RAPL_FORMAT_ATTR(_var, _name, _format) \
-static ssize_t __rapl_##_var##_show(struct kobject *kobj, \
- struct kobj_attribute *attr, \
- char *page) \
-{ \
- BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \
- return sprintf(page, _format "\n"); \
-} \
-static struct kobj_attribute format_attr_##_var = \
- __ATTR(_name, 0444, __rapl_##_var##_show, NULL)
-
#define RAPL_CNTR_WIDTH 32
#define RAPL_EVENT_ATTR_STR(_name, v, str) \
@@ -441,7 +429,7 @@ static struct attribute_group rapl_pmu_events_group = {
.attrs = attrs_empty,
};
-DEFINE_RAPL_FORMAT_ATTR(event, event, "config:0-7");
+PMU_FORMAT_ATTR(event, "config:0-7");
static struct attribute *rapl_formats_attr[] = {
&format_attr_event.attr,
NULL,