[PATCH v5 08/10] parisc/perf: open access for CAP_PERFMON privileged process
Alexey Budankov <[email protected]> Mon, 20 Jan 2020 14:31:49 +0300
| Newsgroups | gmane.linux.kernel.lsm,gmane.linux.kernel,gmane.comp.freedesktop.xorg.drivers.intel,gmane.linux.ports.parisc,gmane.linux.ports.ppc64.devel,gmane.linux.ports.arm.kernel,gmane.linux.kernel.perf.user,gmane.linux.oprofile |
|---|---|
| Organization | Intel Corp. |
| Message-ID | <[email protected]> |
Open access to monitoring for CAP_PERFMON privileged processes. For backward compatibility reasons access to the monitoring remains open for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN usage for secure monitoring is discouraged with respect to CAP_PERFMON capability. Providing the access under CAP_PERFMON capability singly, without the rest of CAP_SYS_ADMIN credentials, excludes chances to misuse the credentials and makes the operations more secure. Signed-off-by: Alexey Budankov <[email protected]> --- arch/parisc/kernel/perf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/parisc/kernel/perf.c b/arch/parisc/kernel/perf.c index 676683641d00..c4208d027794 100644 --- a/arch/parisc/kernel/perf.c +++ b/arch/parisc/kernel/perf.c @@ -300,7 +300,7 @@ static ssize_t perf_write(struct file *file, const char __user *buf, else return -EFAULT; - if (!capable(CAP_SYS_ADMIN)) + if (!perfmon_capable()) return -EACCES; if (count != sizeof(uint32_t)) -- 2.20.1