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| author | Jan H. Schönherr <jschoenh@amazon.de> | 2017-09-07 19:02:48 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-09-15 16:55:28 +0200 |
| commit | 36ae3c0a36b7456432fedce38ae2f7bd3e01a563 (patch) | |
| tree | f105afd5971726ea0c85b46fd24f62c7235633cb /virt/kvm/eventfd.c | |
| parent | 51aa68e7d57e3217192d88ce90fd5b8ef29ec94f (diff) | |
| download | linux-36ae3c0a36b7456432fedce38ae2f7bd3e01a563.tar.gz linux-36ae3c0a36b7456432fedce38ae2f7bd3e01a563.tar.bz2 linux-36ae3c0a36b7456432fedce38ae2f7bd3e01a563.zip | |
KVM: Don't accept obviously wrong gsi values via KVM_IRQFD
We cannot add routes for gsi values >= KVM_MAX_IRQ_ROUTES -- see
kvm_set_irq_routing(). Hence, there is no sense in accepting them
via KVM_IRQFD. Prevent them from entering the system in the first
place.
Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt/kvm/eventfd.c')
| -rw-r--r-- | virt/kvm/eventfd.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index f2ac53ab8243..c608ab495282 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -565,6 +565,8 @@ kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) { if (args->flags & ~(KVM_IRQFD_FLAG_DEASSIGN | KVM_IRQFD_FLAG_RESAMPLE)) return -EINVAL; + if (args->gsi >= KVM_MAX_IRQ_ROUTES) + return -EINVAL; if (args->flags & KVM_IRQFD_FLAG_DEASSIGN) return kvm_irqfd_deassign(kvm, args); |