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Commit 760a9a30 authored by Alan Cox's avatar Alan Cox Committed by Marcelo Tosatti
Browse files

kvm: Fix nonsense handling of compat ioctl 



KVM_SET_SIGNAL_MASK passed a NULL argument leaves the on stack signal
sets uninitialized. It then passes them through to
kvm_vcpu_ioctl_set_sigmask.

We should be passing a NULL in this case not translated garbage.

Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 9acb1725

virt/kvm/kvm_main.c

+4 −3
Original line number Diff line number Diff line
@@ -1976,9 +1976,10 @@ static long kvm_vcpu_compat_ioctl(struct file *filp, 
			if (copy_from_user(&csigset, sigmask_arg->sigset,

					   sizeof csigset))

				goto out;

		}

			sigset_from_compat(&sigset, &csigset);

			r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);

		} else

			r = kvm_vcpu_ioctl_set_sigmask(vcpu, NULL);

		break;

	}

	default: