[PATCH RESEND] perf/core: Call LSM hook after copying perf_event_attr

From: Namhyung Kim
Date: Tue Dec 20 2022 - 17:31:50 EST


It passes the attr struct to the security_perf_event_open() but it's
not initialized yet.

Fixes: da97e18458fb ("perf_event: Add support for LSM and SELinux checks")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
kernel/events/core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 65e20c5c3c44..5d7193d3ffef 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -12293,12 +12293,12 @@ SYSCALL_DEFINE5(perf_event_open,
if (flags & ~PERF_FLAG_ALL)
return -EINVAL;

- /* Do we allow access to perf_event_open(2) ? */
- err = security_perf_event_open(&attr, PERF_SECURITY_OPEN);
+ err = perf_copy_attr(attr_uptr, &attr);
if (err)
return err;

- err = perf_copy_attr(attr_uptr, &attr);
+ /* Do we allow access to perf_event_open(2) ? */
+ err = security_perf_event_open(&attr, PERF_SECURITY_OPEN);
if (err)
return err;

--
2.39.0.314.g84b9a713c41-goog