| commit | 722c05f2192070bac0208b2c16ce13929b32d92f | [log] [tgz] |
|---|---|---|
| author | Avi Kivity <avi@qumranet.com> | Sun Jul 13 11:33:54 2008 +0300 |
| committer | Avi Kivity <avi@qumranet.com> | Sun Jul 20 12:42:40 2008 +0300 |
| tree | 918037277cd65ec4abc1a9b5b15dcf0b8bb8fe25 | |
| parent | 2a7c5b8b550b1fb1db9eb490420132e637f5dcb4 [diff] |
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>