KVM: nSVM: Mark all of vmcb02 dirty when restoring nested state

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commit e63fb1379f upstream.

When restoring a vCPU in guest mode, any state restored before
KVM_SET_NESTED_STATE (e.g. KVM_SET_SREGS) will mark the corresponding
dirty bits in vmcb01, as it is the active VMCB before switching to
vmcb02 in svm_set_nested_state().

Hence, mark all fields in vmcb02 dirty in svm_set_nested_state() to
capture any previously restored fields.

Fixes: cc440cdad5 ("KVM: nSVM: implement KVM_GET_NESTED_STATE and KVM_SET_NESTED_STATE")
CC: stable@vger.kernel.org
Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev>
Link: https://patch.msgid.link/20260210010806.3204289-1-yosry.ahmed@linux.dev
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Yosry Ahmed 2026-02-10 01:08:06 +00:00 • committed by Greg Kroah-Hartman

parent d8b84e0bc9

commit a8b637dc69

1 changed files with 6 additions and 0 deletions

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arch/x86/kvm/svm/nested.c

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