linux-kernel - [PATCH] cfs: NULL pointer check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 16 Sep 2011 13:48:53 -0400
From:	Wang Xingchao <xingchao.wang@...el.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, peterz@...radead.org, yong.zhang0@...il.com,
	alex.shi@...el.com, Wang Xingchao <xingchao.wang@...el.com>
Subject: [PATCH] cfs: NULL pointer check

se maybe NULL if cfs_rq->rb_leftmost is NULL

Signed-off-by: Wang Xingchao <xingchao.wang@...el.com>
---
 kernel/sched_fair.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index fef0bfd..109b232 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1130,6 +1130,10 @@ check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr)
 		return;
 
 	se = __pick_first_entity(cfs_rq);
+
+	if (!se)
+		return;
+
 	delta = curr->vruntime - se->vruntime;
 
 	if (delta < 0)
-- 
1.7.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/