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perf/core: Call LSM hook after copying perf_event_attr 

commit 0a041ebca4 upstream.

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

Fixes: da97e18458 ("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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Namhyung Kim 2022-12-20 14:31:40 -08:00 committed by Greg Kroah-Hartman
parent b4efdc219f
commit 3b480cb214
1 changed files with 3 additions and 3 deletions
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6
kernel/events/core.c
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@ -12176,12 +12176,12 @@ 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;