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| author | Izik Eidus <ieidus@redhat.com> | 2009-07-28 15:26:58 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-24 08:44:09 -0700 |
| commit | d2854b089b53baaf62cf369e27d21573f3c55a68 (patch) | |
| tree | 527999068e9a10e49de1f632b1bedf3ce2864ebd /arch | |
| parent | 5e98b0c4e3a8881da7633241a9e88a7bc8ac0175 (diff) | |
| download | linux-stable-d2854b089b53baaf62cf369e27d21573f3c55a68.tar.gz linux-stable-d2854b089b53baaf62cf369e27d21573f3c55a68.tar.bz2 linux-stable-d2854b089b53baaf62cf369e27d21573f3c55a68.zip | |
KVM: MMU: make __kvm_mmu_free_some_pages handle empty list
commit 3b80fffe2b31fb716d3ebe729c54464ee7856723 upstream.
First check if the list is empty before attempting to look at list
entries.
Signed-off-by: Izik Eidus <ieidus@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 0ef5bb2b4043..a5cdb35af510 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2633,7 +2633,8 @@ EXPORT_SYMBOL_GPL(kvm_mmu_unprotect_page_virt); void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu) { - while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES) { + while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES && + !list_empty(&vcpu->kvm->arch.active_mmu_pages)) { struct kvm_mmu_page *sp; sp = container_of(vcpu->kvm->arch.active_mmu_pages.prev, |