From: Tao Chen chentao.kernel@linux.alibaba.com

The event dir will alloc failed when event name no set, using the command: "echo "e:esys/ syscalls/sys_enter_openat file=$filename:string"

...

dynamic_events"

It seems that dir name="syscalls/sys_enter_openat" is not allowed in debugfs. So just use the "sys_enter_openat" as the event name.

Link: https://lkml.kernel.org/r/1664028814-45923-1-git-send-email-chentao.kernel@l...

Cc: Ingo Molnar mingo@redhat.com Cc: Tom Zanussi zanussi@kernel.org Cc: Linyu Yuan quic_linyyuan@quicinc.com Cc: Tao Chen <chentao.kernel@linux.alibaba.com Cc: stable@vger.kernel.org Fixes: 95c104c378dc ("tracing: Auto generate event name when creating a group of events") Acked-by: Masami Hiramatsu (Google) mhiramat@kernel.org Signed-off-by: Tao Chen chentao.kernel@linux.alibaba.com Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org --- kernel/trace/trace_eprobe.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c index 78299d3724a2..c08bde9871ec 100644 --- a/kernel/trace/trace_eprobe.c +++ b/kernel/trace/trace_eprobe.c @@ -1039,8 +1039,7 @@ static int __trace_eprobe_create(int argc, const char *argv[]) }

if (!event) { - strscpy(buf1, argv[1], MAX_EVENT_NAME_LEN); - sanitize_event_name(buf1); + strscpy(buf1, sys_event, MAX_EVENT_NAME_LEN); event = buf1; }