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Common KVM changes for 6.8:

Browse Source 
- Use memdup_array_user() to harden against overflow.
 
  - Unconditionally advertise KVM_CAP_DEVICE_CTRL for all architectures.
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Merge tag 'kvm-x86-generic-6.8' of https://github.com/kvm-x86/linux into HEAD

Common KVM changes for 6.8:

 - Use memdup_array_user() to harden against overflow.

 - Unconditionally advertise KVM_CAP_DEVICE_CTRL for all architectures.
This commit is contained in:
Paolo Bonzini 2024-01-08 08:09:57 -05:00
commit fb872da8e7
7 changed files with 7 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm64/kvm/arm.c
View File

@ -221,7 +221,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = vgic_present;
break;
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
case KVM_CAP_USER_MEMORY:
case KVM_CAP_SYNC_MMU:
case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:

1
arch/powerpc/kvm/powerpc.c
View File

@ -528,7 +528,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_ENABLE_CAP:
case KVM_CAP_ONE_REG:
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
case KVM_CAP_IMMEDIATE_EXIT:
case KVM_CAP_SET_GUEST_DEBUG:
r = 1;

1
arch/riscv/kvm/vm.c
View File

@ -179,7 +179,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = kvm_riscv_aia_available();
break;
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
case KVM_CAP_USER_MEMORY:
case KVM_CAP_SYNC_MMU:
case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:

4
arch/s390/kvm/guestdbg.c
View File

@ -213,8 +213,8 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
else if (dbg->arch.nr_hw_bp > MAX_BP_COUNT)
return -EINVAL;
bp_data = memdup_user(dbg->arch.hw_bp,
sizeof(*bp_data) * dbg->arch.nr_hw_bp);
bp_data = memdup_array_user(dbg->arch.hw_bp, dbg->arch.nr_hw_bp,
sizeof(*bp_data));
if (IS_ERR(bp_data))
return PTR_ERR(bp_data);

1
arch/s390/kvm/kvm-s390.c
View File

@ -563,7 +563,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_ENABLE_CAP:
case KVM_CAP_S390_CSS_SUPPORT:
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
case KVM_CAP_S390_IRQCHIP:
case KVM_CAP_VM_ATTRIBUTES:
case KVM_CAP_MP_STATE:

4
arch/x86/kvm/cpuid.c
View File

@ -469,7 +469,7 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
return -E2BIG;
if (cpuid->nent) {
e = vmemdup_user(entries, array_size(sizeof(*e), cpuid->nent));
e = vmemdup_array_user(entries, cpuid->nent, sizeof(*e));
if (IS_ERR(e))
return PTR_ERR(e);
@ -513,7 +513,7 @@ int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu,
return -E2BIG;
if (cpuid->nent) {
e2 = vmemdup_user(entries, array_size(sizeof(*e2), cpuid->nent));
e2 = vmemdup_array_user(entries, cpuid->nent, sizeof(*e2));
if (IS_ERR(e2))
return PTR_ERR(e2);
}

6
virt/kvm/kvm_main.c
View File

@ -4867,6 +4867,7 @@ static int kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
#endif
case KVM_CAP_BINARY_STATS_FD:
case KVM_CAP_SYSTEM_EVENT_DATA:
case KVM_CAP_DEVICE_CTRL:
return 1;
#ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
case KVM_CAP_MEMORY_ATTRIBUTES:
@ -5256,9 +5257,8 @@ static long kvm_vm_ioctl(struct file *filp,
goto out;
if (routing.nr) {
urouting = argp;
entries = vmemdup_user(urouting->entries,
array_size(sizeof(*entries),
routing.nr));
entries = vmemdup_array_user(urouting->entries,
routing.nr, sizeof(*entries));
if (IS_ERR(entries)) {
r = PTR_ERR(entries);
goto out;