[PATCH v4 5/9] trace/bpf_trace: open access for CAP_SYS_PERFMON privileged process

[Alexey Budankov]

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@xxxxxxxxxxxxxxx>
---
 kernel/trace/bpf_trace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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;
-- 
2.20.1