From ab4424545f702494d665d95cc2c7ef745d726f8c Mon Sep 17 00:00:00 2001
From: Steven Rostedt <srostedt@redhat.com>
Date: Wed, 18 Feb 2009 22:50:01 -0500
Subject: [PATCH] --- yaml --- r: 131544 b: refs/heads/master c:
 4b3e3d228429c75d398f1aa24532e468d3220c49 h: refs/heads/master v: v3

---
 [refs]                              |  2 +-
 trunk/kernel/trace/trace_selftest.c | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index d67a32d7705b..3476cd0971ba 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4d7a077c0c7bfdba04cf0aa0b79053cf4ebaacf8
+refs/heads/master: 4b3e3d228429c75d398f1aa24532e468d3220c49
diff --git a/trunk/kernel/trace/trace_selftest.c b/trunk/kernel/trace/trace_selftest.c
index a7e0ef662f9f..bc8e80a86bca 100644
--- a/trunk/kernel/trace/trace_selftest.c
+++ b/trunk/kernel/trace/trace_selftest.c
@@ -23,10 +23,20 @@ static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
 {
 	struct ring_buffer_event *event;
 	struct trace_entry *entry;
+	unsigned int loops = 0;
 
 	while ((event = ring_buffer_consume(tr->buffer, cpu, NULL))) {
 		entry = ring_buffer_event_data(event);
 
+		/*
+		 * The ring buffer is a size of trace_buf_size, if
+		 * we loop more than the size, there's something wrong
+		 * with the ring buffer.
+		 */
+		if (loops++ > trace_buf_size) {
+			printk(KERN_CONT ".. bad ring buffer ");
+			goto failed;
+		}
 		if (!trace_valid_entry(entry)) {
 			printk(KERN_CONT ".. invalid entry %d ",
 				entry->type);