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authorMarc Zyngier <maz@kernel.org>2019-11-13 19:05:23 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2019-11-13 19:13:12 +0300
commitb9876e6de123adb52ac693bac08c493e989bd93e (patch)
treece6d3de7b302079d4b624276a18007a9118ba838 /net/Kconfig
parent6cbee2b9eccfc1c93a03aaa286ec93331f7c95e7 (diff)
downloadlinux-b9876e6de123adb52ac693bac08c493e989bd93e.tar.xz
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 'net/Kconfig')
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