The following commit has been merged into the perf/core branch of tip:
Commit-ID: bccae9d7b013bd708ece414f74defaee56790e1d
Gitweb: https://git.kernel.org/tip/bccae9d7b013bd708ece414f74defaee56790e1d
Author: Nathan Chancellor <nathan@xxxxxxxxxx>
AuthorDate: Wed, 14 Apr 2021 17:11:11 -07:00
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Fri, 16 Apr 2021 16:32:44 +02:00
x86/events/amd/iommu: Fix sysfs type mismatch
dev_attr_show() calls _iommu_event_show() via an indirect call but
_iommu_event_show()'s 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_iommu_1/events/mem_dte_hit
csource=0x0a
$ dmesg | grep "CFI failure"
[ 3526.735140] CFI failure (target: _iommu_event_show...):
Change _iommu_event_show() and 'struct amd_iommu_event_desc' to
'struct device_attribute' so that there is no more CFI violation.
Fixes: 7be6296fdd75 ("perf/x86/amd: AMD IOMMU Performance Counter PERF uncore PMU implementation")
Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20210415001112.3024673-1-nathan@xxxxxxxxxx
---
arch/x86/events/amd/iommu.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index be50ef8..6a98a76 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -81,12 +81,12 @@ static struct attribute_group amd_iommu_events_group = {
};
struct amd_iommu_event_desc {
- struct kobj_attribute attr;
+ struct device_attribute attr;
const char *event;
};
-static ssize_t _iommu_event_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
+static ssize_t _iommu_event_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct amd_iommu_event_desc *event =
container_of(attr, struct amd_iommu_event_desc, attr);
|