From: Namhyung Kim <namhyung@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Stephane Eranian <eranian@google.com>,
Andi Kleen <ak@linux.intel.com>, Ian Rogers <irogers@google.com>,
James Morris <jmorris@namei.org>,
Joel Fernandes <joel@joelfernandes.org>
Subject: [PATCH] perf/core: Call LSM hook after copying perf_event_attr
Date: Thu, 2 Jun 2022 15:47:54 -0700 [thread overview]
Message-ID: <20220602224754.602074-1-namhyung@kernel.org> (raw)
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: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
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 7858bafffa9d..e035545f624f 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -12033,12 +12033,12 @@ 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;
--
2.36.1.255.ge46751e96f-goog
next reply other threads:[~2022-06-02 22:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-02 22:47 Namhyung Kim [this message]
2022-06-03 15:05 ` [PATCH] perf/core: Call LSM hook after copying perf_event_attr Joel Fernandes
2022-06-24 17:30 ` Namhyung Kim
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