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KVM: arm64: vgic: Use {get,put}_user() instead of copy_{from.to}_user

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Tidy-up vgic_get_common_attr() and vgic_set_common_attr() to use
{get,put}_user() instead of the more complex (and less type-safe)
copy_{from,to}_user().

Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2022-07-05 11:27:37 +01:00
parent 7e9f723c2a
commit d7df6f282d
1 changed files with 3 additions and 3 deletions
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6
arch/arm64/kvm/vgic/vgic-kvm-device.c
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@ -170,7 +170,7 @@ static int vgic_set_common_attr(struct kvm_device *dev,
u64 addr;
unsigned long type = (unsigned long)attr->attr;
if (copy_from_user(&addr, uaddr, sizeof(addr)))
if (get_user(addr, uaddr))
return -EFAULT;
r = kvm_vgic_addr(dev->kvm, type, &addr, true);
@ -233,14 +233,14 @@ static int vgic_get_common_attr(struct kvm_device *dev,
u64 addr;
unsigned long type = (unsigned long)attr->attr;
if (copy_from_user(&addr, uaddr, sizeof(addr)))
if (get_user(addr, uaddr))
return -EFAULT;
r = kvm_vgic_addr(dev->kvm, type, &addr, false);
if (r)
return (r == -ENODEV) ? -ENXIO : r;
if (copy_to_user(uaddr, &addr, sizeof(addr)))
if (put_user(addr, uaddr))
return -EFAULT;
break;
}