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Message-Id: <1398651958-5103-5-git-send-email-green@linuxhacker.ru>
Date:	Sun, 27 Apr 2014 22:25:58 -0400
From:	Oleg Drokin <green@...uxhacker.ru>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org
Cc:	Oleg Drokin <green@...uxhacker.ru>,
	Oleg Drokin <oleg.drokin@...el.com>,
	Dmitry Eremin <dmitry.eremin@...el.com>,
	Liang Zhen <liang.zhen@...el.com>
Subject: [PATCH v3 4/4] staging/lustre/lnet: fix potential null pointer dereference

Pointer 'ni' checked for NULL at line 1569 may be passed to
function and may be dereferenced there by passing argument 1 to
function 'lnet_ni_notify_locked' at line 1621.
found by Klocwork Insight tool

Signed-off-by: Oleg Drokin <oleg.drokin@...el.com>
CC: Dmitry Eremin <dmitry.eremin@...el.com>
CC: Liang Zhen <liang.zhen@...el.com>
---
 drivers/staging/lustre/lnet/lnet/router.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c
index 995f509..926923a 100644
--- a/drivers/staging/lustre/lnet/lnet/router.c
+++ b/drivers/staging/lustre/lnet/lnet/router.c
@@ -145,7 +145,7 @@ lnet_ni_notify_locked(lnet_ni_t *ni, lnet_peer_t *lp)
 	 * NB individual events can be missed; the only guarantee is that you
 	 * always get the most recent news */
 
-	if (lp->lp_notifying)
+	if (lp->lp_notifying || ni == NULL)
 		return;
 
 	lp->lp_notifying = 1;
-- 
1.9.0

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