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vfio: simplify kmalloc+copy_from_user to memdup_user

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Generated by: coccinelle/api/memdup_user.cocci

Acked-by: Julia Lawall <[email protected]>
Reported-by: Fengguang Wu <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>
This commit is contained in:
Fengguang Wu 2012-12-07 13:43:49 -07:00 • committed by Alex Williamson
commit 3a1f7041dd
1 changed files with 4 additions and 9 deletions
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13
drivers/vfio/pci/vfio_pci.c
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@ -327,15 +327,10 @@ static long vfio_pci_ioctl(void *device_data,
hdr.count > vfio_pci_get_irq_count(vdev, hdr.index))
return -EINVAL;
data = kmalloc(hdr.count * size, GFP_KERNEL);
if (!data)
return -ENOMEM;
if (copy_from_user(data, (void __user *)(arg + minsz),
hdr.count * size)) {
kfree(data);
return -EFAULT;
}
data = memdup_user((void __user *)(arg + minsz),
hdr.count * size);
if (IS_ERR(data))
return PTR_ERR(data);
}
mutex_lock(&vdev->igate);