[v4,5/9] trace/bpf_trace: open access for CAP_SYS_PERFMON privileged process
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Message ID 1d46cc07-ced7-9a29-a9a3-3cba6ef2df21@linux.intel.com
State Superseded
Headers show
  • Introduce CAP_SYS_PERFMON to secure system performance monitoring and observability
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Commit Message

Alexey Budankov Dec. 18, 2019, 9:28 a.m. UTC
Open access to bpf_trace monitoring for CAP_SYS_PERFMON privileged
processes. For backward compatibility reasons access to bpf_trace
monitoring remains open for CAP_SYS_ADMIN privileged processes but
CAP_SYS_ADMIN usage for secure bpf_trace monitoring is discouraged
with respect to CAP_SYS_PERFMON capability.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
 kernel/trace/bpf_trace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 44bd08f2443b..bafe21ac6d92 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1272,7 +1272,7 @@  int perf_event_query_prog_array(struct perf_event *event, void __user *info)
 	u32 *ids, prog_cnt, ids_len;
 	int ret;
-	if (!capable(CAP_SYS_ADMIN))
+	if (!perfmon_capable())
 		return -EPERM;
 	if (event->attr.type != PERF_TYPE_TRACEPOINT)
 		return -EINVAL;