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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>
This commit is contained in:
Vasiliy Kulikov 2010-10-30 13:04:24 +04:00 committed by Marcelo Tosatti
parent eb45fda45f
commit d8cdddcd64
1 changed files with 1 additions and 0 deletions
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arch/powerpc/kvm/powerpc.c
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@ -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;