Messages in this thread | | | From | Suzuki K Poulose <> | Subject | [PATCH v3 0/2] kvm: arm/arm64: Fixes for race conditions | Date | Tue, 16 May 2017 10:34:53 +0100 |
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The patches fixes race conditions in stage2 pgd accesses.
Patch 1 is a fix up for the patch which has already been pushed to kvmarm/master.
Patch 2 fixes a case where stage2 PGD could be free'd when we release the kvm->mmu_lock to prevent VCPU starvation.
Applies on kvmarm/master tree
Changes since V2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-May/504401.html
- Patch 1 in V2 has been pushed to kvmarm/master. Added a fixup to the original patch to make sure we don't use cached stage2 pgd. - Patch 2: Handle cases where unmap_stage2_range may be called without checking the validity of stage2 pgd.
Changes since v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-April/502867.html
- Dropped patch for fixing mmu_notifier race condition, which couldn't be reproduced. - Added reviewed-by from Christoffer - Added new patch to fix another race condition
Suzuki K Poulose (2): kvm: arm/arm64: Force reading uncached stage2 PGD kvm: arm/arm64: Fix use after free of stage2 page table
virt/kvm/arm/mmu.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)
-- 2.7.4
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