linux-kernel - [PATCH 2/2] lib: list_sort_test(): Add extra corruption check

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Date:	Sat, 21 Jun 2014 01:49:02 +0200
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>,
	Don Mullis <don.mullis@...il.com>,
	Dave Chinner <david@...morbit.com>
Cc:	linux-kernel@...r.kernel.org,
	Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: [PATCH 2/2] lib: list_sort_test(): Add extra corruption check

Add a check to make sure that the prev pointer of the list head points
to the last element on the list.

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 lib/list_sort.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/list_sort.c b/lib/list_sort.c
index 291412a..832f525 100644
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -272,6 +272,11 @@ static int __init list_sort_test(void)
 		}
 		count++;
 	}
+	if (head->prev != cur) {
+		printk(KERN_ERR "list_sort_test: error: list is corrupted\n");
+		goto exit;
+	}
+
 
 	if (count != TEST_LIST_LEN) {
 		printk(KERN_ERR "list_sort_test: error: bad list length %d",
-- 
1.9.2

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