arm/arm64: KVM: Fix ioctl error handling

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[ Upstream commit 4cad67fca3 ]

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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

...

This commit is contained in:

Michael S. Tsirkin 2016-02-28 17:32:07 +02:00 • committed by Sasha Levin

parent 092bb6bd43

commit 222b341c10

2 changed files with 2 additions and 2 deletions

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arch/arm/kvm/guest.c

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2

arch/arm64/kvm/guest.c

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