pveproxy worker segfault

Hello, everybody ! I'm using kernel version 3.10.0-2 and today watched error in kernel logs .

[534952.224767] pveproxy worker [ 18844 ]: segfault at 4 ip 00007f0d3e465493 sp 00007ffff7885378 error 4 in libqb.so.0.11.1 [7f0d3e44e000 +1 f000]

So often when applying any load on the guest system appears like this:

[461799.759793] kvm: zapping shadow pages for mmio generation wraparound
[461799.760945] kvm: zapping shadow pages for mmio generation wraparound
[470419.454367] kvm: zapping shadow pages for mmio generation wraparound
[470419.455371] kvm: zapping shadow pages for mmio generation wraparound

What it can be connected and how it can threaten the entire system ?

pveversion-v
proxmox-ve-2.6.32: 3.2-126 (running kernel: 3.10.0- 2 -pve)
pve-manager: 3.2-4 (running version: 3.2-4/e24a91c1)
pve-kernel-3.10.0- 2 -pve: 3.10.0-10
pve-kernel-2.6.32- 29 -pve: 2.6.32-126
lvm2: 2.02.98-pve4
clvm: 2.02.98-pve4
corosync-pve: 1.4.5-1
openais-pve: 1.1.4-3
libqb0: 0.11.1-2
redhat-cluster-pve: 3.2.0-2
resource-agents-pve: 3.9.2-4
fence-agents-pve: 4.0.5-1
pve-cluster: 3.0-12
qemu-server: 3.1-16
pve-firmware: 1.1-3
libpve-common-perl: 3.0-18
libpve-access-control: 3.0-11
libpve-storage-perl: 3.0-19
pve-libspice-server1: 0.12.4-3
vncterm: 1.1-6
vzctl: 4.0-1pve5
vzprocps: 2.0.11-2
vzquota: 3.1-2
pve-qemu-kvm: 1.7-8
ksm-control-daemon: 1.1-1
glusterfs-client: 3.4.2-1

Thank you if you help me with this.