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UPSTREAM: perf/core: Call LSM hook after copying perf_event_attr

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

Bug: 254441685
Fixes: da97e18458fb ("perf_event: Add support for LSM and SELinux checks")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20221220223140.4020470-1-namhyung@kernel.org
(cherry picked from commit 0a041ebca4956292cadfb14a63ace3a9c1dcb0a3)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I0bda5722f4cff80252e2ec483b5b1f18b1194356
This commit is contained in:
Namhyung Kim
2022-12-20 14:31:40 -08:00
committed by Lee Jones
parent bee81d3469
commit 2b1ca43460
1 changed files with 3 additions and 3 deletions
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6
kernel/events/core.c
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@@ -10596,12 +10596,12 @@ 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;