The following commit has been merged into the perf/core branch of tip:
Commit-ID: b04c0cddff6d1d6656c7f7c08c0b8f07eb287564
Gitweb: https://git.kernel.org/tip/b04c0cddff6d1d6656c7f7c08c0b8f07eb287564
Author: Nathan Chancellor <nathan@xxxxxxxxxx>
AuthorDate: Wed, 14 Apr 2021 17:11:12 -07:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 16 Apr 2021 16:32:44 +02:00
perf/amd/uncore: Fix sysfs type mismatch
dev_attr_show() calls the __uncore_*_show() functions via an indirect
call but their type does not currently match the type of the show()
member in 'struct device_attribute', resulting in a Control Flow
Integrity violation.
$ cat /sys/devices/amd_l3/format/umask
config:8-15
$ dmesg | grep "CFI failure"
[ 1258.174653] CFI failure (target: __uncore_umask_show...):
Update the type in the DEFINE_UNCORE_FORMAT_ATTR macro to match
'struct device_attribute' so that there is no more CFI violation.
Fixes: 06f2c24584f3 ("perf/amd/uncore: Prepare to scale for more attributes that vary per family")
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20210415001112.3024673-2-nathan@xxxxxxxxxx
---
arch/x86/events/amd/uncore.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index 7f014d4..582c0ff 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -275,14 +275,14 @@ static struct attribute_group amd_uncore_attr_group = {
};
#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)
DEFINE_UNCORE_FORMAT_ATTR(event12, event, "config:0-7,32-35");
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