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hvc_xen: NULL dereference on allocation failure

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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.

CC: stable@kernel.org
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Dan Carpenter 2012-05-15 11:47:47 +03:00 committed by Konrad Rzeszutek Wilk
parent d79d5959a0
commit 201a52bea9
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/hvc/hvc_xen.c
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@ -430,9 +430,9 @@ static int __devinit xencons_probe(struct xenbus_device *dev,
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);