From 6597ca09e6c0e5aec7ffd2b8ab48c671d3c28414 Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Sun, 8 Jun 2008 01:48:53 -0300 Subject: [PATCH] KVM: MMU: Fix rmap_write_protect() hugepage iteration bug rmap_next() does not work correctly after rmap_remove(), as it expects the rmap chains not to change during iteration. Fix (for now) by restarting iteration from the beginning. Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index ee3f53098f0..9628091c574 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -640,6 +640,7 @@ static void rmap_write_protect(struct kvm *kvm, u64 gfn) rmap_remove(kvm, spte); --kvm->stat.lpages; set_shadow_pte(spte, shadow_trap_nonpresent_pte); + spte = NULL; write_protected = 1; } spte = rmap_next(kvm, rmapp, spte); -- 2.20.1