From d8cdddcd645766cd4d80fa222226ae6ebfb706af Mon Sep 17 00:00:00 2001 From: Vasiliy Kulikov Date: Sat, 30 Oct 2010 13:04:24 +0400 Subject: [PATCH] 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 Signed-off-by: Marcelo Tosatti --- arch/powerpc/kvm/powerpc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 2f87a16..38f756f 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -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; -- 2.7.4