Commit cd5998ebfbc9e6cb44408efa217c15d7eea13675
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18b13e5457
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KVM: MMU: Fix torn shadow pte
The shadow code assigns a pte directly in one place, which is nonatomic on i386 can can cause random memory references. Fix by using an atomic setter. Signed-off-by: Avi Kivity <avi@qumranet.com>
Showing 1 changed file with 1 additions and 1 deletions Side-by-side Diff
arch/x86/kvm/paging_tmpl.h
| ... | ... | @@ -345,7 +345,7 @@ |
| 345 | 345 | shadow_addr = __pa(shadow_page->spt); |
| 346 | 346 | shadow_pte = shadow_addr | PT_PRESENT_MASK | PT_ACCESSED_MASK |
| 347 | 347 | | PT_WRITABLE_MASK | PT_USER_MASK; |
| 348 | - *shadow_ent = shadow_pte; | |
| 348 | + set_shadow_pte(shadow_ent, shadow_pte); | |
| 349 | 349 | } |
| 350 | 350 | |
| 351 | 351 | mmu_set_spte(vcpu, shadow_ent, access, walker->pte_access & access, |