Re: [PATCH] KVM: hyperv: idr_find needs RCU protection

[Roman Kagan]

On Mon, May 07, 2018 at 07:25:00PM +0200, Paolo Bonzini wrote:
> Even though the eventfd is released after the KVM SRCU grace period
> elapses, the conn_to_evt data structure itself is not; it uses RCU
> internally, instead.  Fix the read-side critical section to happen
> under rcu_read_lock/unlock; the result is still protected by
> vcpu->kvm->srcu.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> ---
>  arch/x86/kvm/hyperv.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Reviewed-by: Roman Kagan <rkagan@xxxxxxxxxxxxx>