mbox series

[v2,0/4] KVM: Reject vCPU IDs above 2^32

Message ID 20240612215415.3450952-1-minipli@grsecurity.net (mailing list archive)
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Series KVM: Reject vCPU IDs above 2^32 | expand

Message

Mathias Krause June 12, 2024, 9:54 p.m. UTC 
vCPU IDs above 2^32 are currently not rejected as invalid for
KVM_CREATE_VCPU and KVM_SET_BOOT_CPU_ID.

Below patches fix this and add selftests for it.

Please apply!

Thanks,
Mathias

v1: https://lore.kernel.org/kvm/20240605220504.2941958-1-minipli@grsecurity.net/

changes v1->v2:
- add comment and build bug to make truncation check more obvious (Sean)
- handle KVM_SET_BOOT_CPU_ID similar

Mathias Krause (4):
  KVM: Reject overly excessive IDs in KVM_CREATE_VCPU
  KVM: selftests: Test vCPU IDs above 2^32
  KVM: Limit check IDs for KVM_SET_BOOT_CPU_ID
  KVM: selftests: Test vCPU boot IDs above 2^32

 arch/x86/kvm/x86.c                                   | 12 +++++++++---
 .../selftests/kvm/x86_64/max_vcpuid_cap_test.c       | 11 ++++++++++-
 tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c | 11 +++++++++++
 virt/kvm/kvm_main.c                                  | 10 +++++++++-
 4 files changed, 39 insertions(+), 5 deletions(-)