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| author | Marc Zyngier <maz@kernel.org> | 2019-11-13 16:05:23 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-11-13 17:13:12 +0100 |
| commit | b9876e6de123adb52ac693bac08c493e989bd93e (patch) | |
| tree | ce6d3de7b302079d4b624276a18007a9118ba838 /arch/x86/kvm/mmu.c | |
| parent | 6cbee2b9eccfc1c93a03aaa286ec93331f7c95e7 (diff) | |
KVM: Forbid /dev/kvm being opened by a compat task when CONFIG_KVM_COMPAT=n
On a system without KVM_COMPAT, we prevent IOCTLs from being issued
by a compat task. Although this prevents most silly things from
happening, it can still confuse a 32bit userspace that is able
to open the kvm device (the qemu test suite seems to be pretty
mad with this behaviour).
Take a more radical approach and return a -ENODEV to the compat
task.
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
0 files changed, 0 insertions, 0 deletions