linux-kernel - [PATCH 1/2] oom: fix NULL pointer dereference

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Message-Id: <20100819195310.5FC7.A69D9226@jp.fujitsu.com>
Date:	Thu, 19 Aug 2010 19:53:31 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: [PATCH 1/2] oom: fix NULL pointer dereference

commit b940fd7035 (oom: remove unnecessary code and cleanup) added
unnecessary NULL pointer dereference. remove it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
 mm/oom_kill.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 5014e50..17d48a6 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -401,10 +401,9 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
 static int oom_kill_task(struct task_struct *p, struct mem_cgroup *mem)
 {
 	p = find_lock_task_mm(p);
-	if (!p) {
-		task_unlock(p);
+	if (!p)
 		return 1;
-	}
+
 	pr_err("Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB\n",
 		task_pid_nr(p), p->comm, K(p->mm->total_vm),
 		K(get_mm_counter(p->mm, MM_ANONPAGES)),
-- 
1.6.5.2



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