Messages in this thread Patch in this message | | | Date | Fri, 16 Apr 2021 17:13:42 -0000 | From | "tip-bot2 for Nathan Chancellor" <> | Subject | [tip: perf/core] perf/amd/uncore: Fix sysfs type mismatch |
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The following commit has been merged into the perf/core branch of tip:
Commit-ID: 5deac80d4571dffb51f452f0027979d72259a1b9 Gitweb: https://git.kernel.org/tip/5deac80d4571dffb51f452f0027979d72259a1b9 Author: Nathan Chancellor <nathan@kernel.org> AuthorDate: Wed, 14 Apr 2021 17:11:12 -07:00 Committer: Peter Zijlstra <peterz@infradead.org> CommitterDate: Fri, 16 Apr 2021 18:58:52 +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@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210415001112.3024673-2-nathan@kernel.org --- 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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