arm/arm64: KVM: Fix ioctl error handling
authorMichael S. Tsirkin <mst@redhat.com>
Sun, 28 Feb 2016 15:32:07 +0000 (17:32 +0200)
committerMarc Zyngier <marc.zyngier@arm.com>
Mon, 29 Feb 2016 09:56:40 +0000 (09:56 +0000)
commit4cad67fca3fc952d6f2ed9e799621f07666a560f
treeeb24441cbebf6d8523ddd9ea1323ab052a431614
parentfd451b90e78c4178bcfc5072f2b2b637500c109a
arm/arm64: KVM: Fix ioctl error handling

Calling return copy_to_user(...) in an ioctl will not
do the right thing if there's a pagefault:
copy_to_user returns the number of bytes not copied
in this case.

Fix up kvm to do
return copy_to_user(...)) ?  -EFAULT : 0;

everywhere.

Cc: stable@vger.kernel.org
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
arch/arm/kvm/guest.c
arch/arm64/kvm/guest.c