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KVM: s390: Fix for 4.10 (via kvm/master) 

Fix a kernel memory exposure.
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Merge tag 'kvm-s390-master-4.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux

KVM: s390: Fix for 4.10 (via kvm/master)

Fix a kernel memory exposure.
This commit is contained in:
Radim Krčmář 2017-01-20 17:59:02 +01:00
parent ce2e852ecc 0447819741
commit fec9690123
1 changed files with 2 additions and 2 deletions
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4
arch/s390/kvm/kvm-s390.c
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@ -916,7 +916,7 @@ static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
memcpy(&mach->fac_mask, kvm->arch.model.fac_mask,
S390_ARCH_FAC_LIST_SIZE_BYTE);
memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
S390_ARCH_FAC_LIST_SIZE_BYTE);
sizeof(S390_lowcore.stfle_fac_list));
if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach)))
ret = -EFAULT;
kfree(mach);
@ -1437,7 +1437,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
/* Populate the facility mask initially. */
memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list,
S390_ARCH_FAC_LIST_SIZE_BYTE);
sizeof(S390_lowcore.stfle_fac_list));
for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) {
if (i < kvm_s390_fac_list_mask_size())
kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i];