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KVM: arm64: Tentative fixes for page-table lifetime issues

Will Deacon kvmarm linux-arm-kernel 1 version Applied

Status from this message: Applied to next, thanks!

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  1. v1 Latest2 patches 1 replyApplied

Patches in v1 Applied

#Subject and filesSizeRepliesApplied
1/2KVM: arm64: Don't leave mmu->pgt dangling on kvm_init_stage2_mmu() errorarch/arm64/kvm/mmu.c+1 -00 replies
2/2KVM: arm64: Destroy stage-2 page-table in kvm_arch_destroy_vm()arch/arm64/kvm/arm.c+1 -00 replies

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Cover letter [PATCH 0/2] KVM: arm64: Tentative fixes for page-table lifetime issues

Hi all,

Sashiko highlighted a couple of potential page-table lifetime issues in the upstream code while it was reviewing the pKVM protected memory series. They make sense to me so I've had a crack at fixing them and writing a better description of the problem in the commit message.

For the second issue, I've tested it by forcing the notifier registration to fail and then watching the SecPageTables line in /proc/meminfo after attempting to create VMs.

Cheers,

Will

Cc Marc Zyngier <[email protected]>
Cc Oliver Upton <[email protected]>
Cc Joey Gouly <[email protected]>
Cc Suzuki K Poulose <[email protected]>
Cc Zenghui Yu <[email protected]>

--->8

Will Deacon (2):
KVM: arm64: Don't leave mmu->pgt dangling on kvm_init_stage2_mmu()
error
KVM: arm64: Destroy stage-2 page-table in kvm_arch_destroy_vm()

 arch/arm64/kvm/arm.c | 1 +
 arch/arm64/kvm/mmu.c | 1 +
 2 files changed, 2 insertions(+)
Signature · 1 line
2.53.0.1018.g2bb0e51243-goog

Read the cover letter in its thread