ftrace: disable all tracers on corrupted buffer

If the trace buffer is detected to be corrupted, then we
disable all tracers.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

kernel/trace/trace_selftest.c

diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 4c8a1b2..a6f1ed7 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -67,6 +67,8 @@
 	return 0;
 
  failed:
+	/* disable tracing */
+	tracing_disabled = 1;
 	printk(KERN_CONT ".. corrupted trace buffer .. ");
 	return -1;
 }