Commit d8cdddcd authored Oct 30, 2010 by Vasiliy Kulikov Committed by Marcelo Tosatti Nov 05, 2010

KVM: PPC: fix information leak to userland



Structure kvm_ppc_pvinfo is copied to userland with flags and
pad fields unitialized.  It leads to leaking of contents of
kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

parent eb45fda4

arch/powerpc/kvm/powerpc.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -617,6 +617,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
		switch (ioctl) {
		case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
		memset(&pvinfo, 0, sizeof(pvinfo));
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
		r = -EFAULT;