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| author | Paolo Bonzini <pbonzini@redhat.com> | 2017-03-27 18:53:50 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-03-28 15:08:02 +0300 |
| commit | 2beb6dad2e8f95d710159d5befb390e4f62ab5cf (patch) | |
| tree | de7330624e1508cc44fd21799cc689a7038c9a86 /arch/x86/kvm/page_track.c | |
| parent | 7ad658b693536741c37b16aeb07840a2ce75f5b9 (diff) | |
| download | linux-2beb6dad2e8f95d710159d5befb390e4f62ab5cf.tar.xz | |
KVM: x86: cleanup the page tracking SRCU instance
SRCU uses a delayed work item. Skip cleaning it up, and
the result is use-after-free in the work item callbacks.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Suggested-by: Dmitry Vyukov <dvyukov@google.com>
Cc: stable@vger.kernel.org
Fixes: 0eb05bf290cfe8610d9680b49abef37febd1c38a
Reviewed-by: Xiao Guangrong <xiaoguangrong.eric@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/page_track.c')
| -rw-r--r-- | arch/x86/kvm/page_track.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/page_track.c b/arch/x86/kvm/page_track.c index 37942e419c32..60168cdd0546 100644 --- a/arch/x86/kvm/page_track.c +++ b/arch/x86/kvm/page_track.c @@ -160,6 +160,14 @@ bool kvm_page_track_is_active(struct kvm_vcpu *vcpu, gfn_t gfn, return !!ACCESS_ONCE(slot->arch.gfn_track[mode][index]); } +void kvm_page_track_cleanup(struct kvm *kvm) +{ + struct kvm_page_track_notifier_head *head; + + head = &kvm->arch.track_notifier_head; + cleanup_srcu_struct(&head->track_srcu); +} + void kvm_page_track_init(struct kvm *kvm) { struct kvm_page_track_notifier_head *head; |