From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120527002522.367563701@linuxfoundation.org> Date: Sun, 27 May 2012 09:26:17 +0900 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Stefano Stabellini , Dan Carpenter , Konrad Rzeszutek Wilk Subject: [ 71/91] hvc_xen: NULL dereference on allocation failure In-Reply-To: <20120527010903.GA18244@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dan Carpenter commit 201a52bea928687b7557728b176ac4f8a37d5cbd upstream. If kzalloc() returns a NULL here, we pass a NULL to xencons_disconnect_backend() which will cause an Oops. Also I removed the __GFP_ZERO while I was at it since kzalloc() implies __GFP_ZERO. Acked-by: Stefano Stabellini Signed-off-by: Dan Carpenter Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvc_xen.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/tty/hvc/hvc_xen.c +++ b/drivers/tty/hvc/hvc_xen.c @@ -430,9 +430,9 @@ static int __devinit xencons_probe(struc if (devid == 0) return -ENODEV; - info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL | __GFP_ZERO); + info = kzalloc(sizeof(struct xencons_info), GFP_KERNEL); if (!info) - goto error_nomem; + return -ENOMEM; dev_set_drvdata(&dev->dev, info); info->xbdev = dev; info->vtermno = xenbus_devid_to_vtermno(devid);