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| author | Sean Christopherson <seanjc@google.com> | 2026-03-10 16:48:13 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-04-22 13:32:20 +0200 |
| commit | c87938fc7d99a06a7e5477c45b4e5a4148f85d66 (patch) | |
| tree | 19c93b0a54914c6bc1244b2ea3273dfe2dd6be3a /scripts/stackusage | |
| parent | fbbd7398a05f2103044af368a5d10319a55bab5f (diff) | |
| download | kernel-c87938fc7d99a06a7e5477c45b4e5a4148f85d66.tar.gz | |
KVM: SEV: Lock all vCPUs when synchronzing VMSAs for SNP launch finish
commit cb923ee6a80f4e604e6242a4702b59251e61a380 upstream.
Lock all vCPUs when synchronizing and encrypting VMSAs for SNP guests, as
allowing userspace to manipulate and/or run a vCPU while its state is being
synchronized would at best corrupt vCPU state, and at worst crash the host
kernel.
Opportunistically assert that vcpu->mutex is held when synchronizing its
VMSA (the SEV-ES path already locks vCPUs).
Fixes: ad27ce155566 ("KVM: SEV: Add KVM_SEV_SNP_LAUNCH_FINISH command")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260310234829.2608037-6-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/stackusage')
0 files changed, 0 insertions, 0 deletions