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| author | Avi Kivity <avi@qumranet.com> | 2008-07-13 10:33:54 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-07-20 11:42:40 +0200 |
| commit | 722c05f2192070bac0208b2c16ce13929b32d92f (patch) | |
| tree | 918037277cd65ec4abc1a9b5b15dcf0b8bb8fe25 /virt/kvm/kvm_main.c | |
| parent | KVM: x86 emulator: emulate clflush (diff) | |
| download | linux-722c05f2192070bac0208b2c16ce13929b32d92f.tar.xz linux-722c05f2192070bac0208b2c16ce13929b32d92f.zip | |
KVM: MMU: Fix potential race setting upper shadow ptes on nonpae hosts
The direct mapped shadow code (used for real mode and two dimensional paging)
sets upper-level ptes using direct assignment rather than calling
set_shadow_pte(). A nonpae host will split this into two writes, which opens
up a race if another vcpu accesses the same memory area.
Fix by calling set_shadow_pte() instead of assigning directly.
Noticed by Izik Eidus.
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
0 files changed, 0 insertions, 0 deletions