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| author | Paolo Bonzini <[email protected]> | 2025-03-06 20:29:22 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2025-03-14 18:20:03 +0000 |
| commit | 74c1807f6c4feddb3c3cb1056c54531d4adbaea6 (patch) | |
| tree | e39bef76c21a6af069d528e18e1a4dc568886712 /net/unix/unix_bpf.c | |
| parent | KVM: x86: Add infrastructure for secure TSC (diff) | |
| download | kernel-74c1807f6c4feddb3c3cb1056c54531d4adbaea6.tar.gz kernel-74c1807f6c4feddb3c3cb1056c54531d4adbaea6.zip | |
KVM: x86: block KVM_CAP_SYNC_REGS if guest state is protected
KVM_CAP_SYNC_REGS does not make sense for VMs with protected guest state,
since the register values cannot actually be written. Return 0
when using the VM-level KVM_CHECK_EXTENSION ioctl, and accordingly
return -EINVAL from KVM_RUN if the valid/dirty fields are nonzero.
However, on exit from KVM_RUN userspace could have placed a nonzero
value into kvm_run->kvm_valid_regs, so check guest_state_protected
again and skip store_regs() in that case.
Cc: [email protected]
Fixes: 517987e3fb19 ("KVM: x86: add fields to struct kvm_arch for CoCo features")
Signed-off-by: Paolo Bonzini <[email protected]>
Message-ID: <[email protected]>
Reviewed-by: Pankaj Gupta <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'net/unix/unix_bpf.c')
0 files changed, 0 insertions, 0 deletions