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| author | Avi Kivity <avi@qumranet.com> | 2008-07-13 11:33:54 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-07-20 12:42:40 +0300 |
| commit | 722c05f2192070bac0208b2c16ce13929b32d92f (patch) | |
| tree | 918037277cd65ec4abc1a9b5b15dcf0b8bb8fe25 /virt | |
| parent | 2a7c5b8b550b1fb1db9eb490420132e637f5dcb4 (diff) | |
| download | linux-722c05f2192070bac0208b2c16ce13929b32d92f.tar.gz linux-722c05f2192070bac0208b2c16ce13929b32d92f.tar.bz2 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')
0 files changed, 0 insertions, 0 deletions