[v5,08/10] parisc/perf: open access for CAP_PERFMON privileged process
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Message ID cf23b65c-00cd-f3b5-5e74-fa3832bfb583@linux.intel.com
State Changes Requested
Headers show
Series
  • Introduce CAP_PERFMON to secure system performance monitoring and observability
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Commit Message

Alexey Budankov Jan. 20, 2020, 11:31 a.m. UTC
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 <alexey.budankov@linux.intel.com>
---
 arch/parisc/kernel/perf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch
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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))