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author | Marc Zyngier <marc.zyngier@arm.com> | 2018-06-17 12:16:21 +0300 |
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committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-06-21 19:17:50 +0300 |
commit | 7ddfd3e0df29106c728dda2a6bd6591ee43a4e3c (patch) | |
tree | 881292b233bf620c55ae432583778e59a18f4591 /virt/kvm/Kconfig | |
parent | 47a91b7232fa25abc7e0b7fc1c69ae4f81061594 (diff) | |
download | linux-7ddfd3e0df29106c728dda2a6bd6591ee43a4e3c.tar.xz |
KVM: Enforce error in ioctl for compat tasks when !KVM_COMPAT
The current behaviour of the compat ioctls is a bit odd.
We provide a compat_ioctl method when KVM_COMPAT is set, and NULL
otherwise. But NULL means that the normal, non-compat ioctl should
be used directly for compat tasks, and there is no way to actually
prevent a compat task from issueing KVM ioctls.
This patch changes this behaviour, by always registering a compat_ioctl
method, even if KVM_COMPAT is not selected. In that case, the callback
will always return -EINVAL.
Fixes: de8e5d744051568c8aad ("KVM: Disable compat ioctl for s390")
Reported-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt/kvm/Kconfig')
0 files changed, 0 insertions, 0 deletions