linux-kernel - [097/107] kcore: fix test for end of list

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Message-Id: <20111102221458.997237336@clark.kroah.org>
Date:	Wed, 02 Nov 2011 15:15:03 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Dan Carpenter <error27@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	WANG Cong <xiyou.wangcong@...il.com>,
	Leonardo Chiquitto <leonardo.lists@...il.com>
Subject: [097/107] kcore: fix test for end of list

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Dan Carpenter <error27@...il.com>

commit 4fd2c20d964a8fb9861045f1022475c9d200d684 upstream.

"m" is never NULL here.  We need a different test for the end of list
condition.

Signed-off-by: Dan Carpenter <error27@...il.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Acked-by: WANG Cong <xiyou.wangcong@...il.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Leonardo Chiquitto <leonardo.lists@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 fs/proc/kcore.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -490,7 +490,7 @@ read_kcore(struct file *file, char __use
 		}
 		read_unlock(&kclist_lock);
 
-		if (m == NULL) {
+		if (&m->list == &kclist_head) {
 			if (clear_user(buffer, tsz))
 				return -EFAULT;
 		} else if (is_vmalloc_or_module_addr((void *)start)) {


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