From: sunliming <sunliming@xxxxxxxxxx> commit f6d026eea390d59787a6cdc2ef5c983d02e029d0 upstream. The writing operation return the count of writes regardless of whether events are enabled or disabled. Switch it to return -EBADF to indicates that the event is disabled. Link: https://lkml.kernel.org/r/20230626111344.19136-2-sunliming@xxxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx 7f5a08c79df35 ("user_events: Add minimal support for trace_event into ftrace") Acked-by: Beau Belgrave <beaub@xxxxxxxxxxxxxxxxxxx> Signed-off-by: sunliming <sunliming@xxxxxxxxxx> Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- kernel/trace/trace_events_user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1456,7 +1456,8 @@ static ssize_t user_events_write_core(st if (unlikely(faulted)) return -EFAULT; - } + } else + return -EBADF; return ret; }
