linux-kernel - [PATCH] mISDN: correctly handling failed allocation in fsm

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Message-Id: <1451425293-30262-1-git-send-email-wuninsu@gmail.com>
Date:	Tue, 29 Dec 2015 16:41:33 -0500
From:	Insu Yun <wuninsu@...il.com>
To:	isdn@...ux-pingi.de, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	taesoo@...ech.edu, yeongjin.jang@...ech.edu, insu@...ech.edu,
	changwoo@...ech.edu, Insu Yun <wuninsu@...il.com>
Subject: [PATCH] mISDN: correctly handling failed allocation in fsm

Since kzalloc can be failed in memory pressure,
NULL dereference can be happened.

Signed-off-by: Insu Yun <wuninsu@...il.com>
---
 drivers/isdn/mISDN/fsm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/isdn/mISDN/fsm.c b/drivers/isdn/mISDN/fsm.c
index 26477d4..3c3ffb0 100644
--- a/drivers/isdn/mISDN/fsm.c
+++ b/drivers/isdn/mISDN/fsm.c
@@ -34,6 +34,8 @@ mISDN_FsmNew(struct Fsm *fsm,
 
 	fsm->jumpmatrix = kzalloc(sizeof(FSMFNPTR) * fsm->state_count *
 				  fsm->event_count, GFP_KERNEL);
+	if (!fsm->jumpmatrix)
+		return;
 
 	for (i = 0; i < fncount; i++)
 		if ((fnlist[i].state >= fsm->state_count) ||
-- 
1.9.1

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