lkml.org 
[lkml]   [2017]   [May]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v3 0/2] kvm: arm/arm64: Fixes for race conditions
Date
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

\
 
 \ /
  Last update: 2017-05-16 11:35    [W:0.040 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site