Structure kvm_ppc_pvinfo is copied to userland with pad field
unitialized. Structure kvm_clock_data 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@xxxxxxxxx>
---
I cannot compile this driver, so it is not tested at all.
As it is not compilable, I've missed and typed wrong var name in v1, sorry.
arch/x86/kvm/x86.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b0818f6..261f3d0 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2896,6 +2896,7 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
case KVM_GET_DEBUGREGS: {
struct kvm_debugregs dbgregs;
+ memset(&dbgregs, 0, sizeof(dbgregs));
kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
r = -EFAULT;
@@ -3481,11 +3482,11 @@ long kvm_arch_vm_ioctl(struct file *filp,
struct kvm_clock_data user_ns;
u64 now_ns;
+ memset(&user_ns, 0, sizeof(user_ns));
local_irq_disable();
now_ns = get_kernel_ns();
user_ns.clock = kvm->arch.kvmclock_offset + now_ns;
local_irq_enable();
- user_ns.flags = 0;
r = -EFAULT;
if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
--
1.7.0.4
--
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