Comment 2 for bug 1704210

ubuntu@autopkgtest:~$ sysctl -a | grep veth | grep accept
sysctl: permission denied on key 'fs.protected_hardlinks'
sysctl: permission denied on key 'fs.protected_symlinks'
sysctl: permission denied on key 'kernel.cad_pid'
sysctl: permission denied on key 'kernel.unprivileged_userns_apparmor_policy'
sysctl: permission denied on key 'kernel.usermodehelper.bset'
sysctl: permission denied on key 'kernel.usermodehelper.inheritable'
sysctl: permission denied on key 'net.core.bpf_jit_harden'
sysctl: permission denied on key 'net.core.bpf_jit_kallsyms'
sysctl: permission denied on key 'net.ipv4.tcp_fastopen_key'
sysctl: permission denied on key 'net.ipv6.conf.all.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.default.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.ens3.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.eth42.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.eth43.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.hwsim0.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.lo.stable_secret'
net.ipv4.conf.veth42.accept_local = 0
net.ipv4.conf.veth42.accept_redirects = 1
net.ipv4.conf.veth42.accept_source_route = 1
net.ipv4.conf.veth42.arp_accept = 0
net.ipv4.conf.veth43.accept_local = 0
net.ipv4.conf.veth43.accept_redirects = 1
net.ipv4.conf.veth43.accept_source_route = 1
net.ipv4.conf.veth43.arp_accept = 0
net.ipv6.conf.veth42.accept_dad = 1
net.ipv6.conf.veth42.accept_ra = 1
net.ipv6.conf.veth42.accept_ra_defrtr = 1
net.ipv6.conf.veth42.accept_ra_from_local = 0
net.ipv6.conf.veth42.accept_ra_min_hop_limit = 1
net.ipv6.conf.veth42.accept_ra_mtu = 1
net.ipv6.conf.veth42.accept_ra_pinfo = 1
net.ipv6.conf.veth42.accept_ra_rt_info_max_plen = 0
sysctl: permission denied on key 'net.ipv6.conf.veth42.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.veth43.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.wlan0.stable_secret'
sysctl: permission denied on key 'net.ipv6.conf.wlan1.stable_secret'
net.ipv6.conf.veth42.accept_ra_rtr_pref = 1
net.ipv6.conf.veth42.accept_redirects = 1
net.ipv6.conf.veth42.accept_source_route = 0
net.ipv6.conf.veth43.accept_dad = 1
net.ipv6.conf.veth43.accept_ra = 1
net.ipv6.conf.veth43.accept_ra_defrtr = 1
net.ipv6.conf.veth43.accept_ra_from_local = 0
net.ipv6.conf.veth43.accept_ra_min_hop_limit = 1
net.ipv6.conf.veth43.accept_ra_mtu = 1
net.ipv6.conf.veth43.accept_ra_pinfo = 1
net.ipv6.conf.veth43.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.veth43.accept_ra_rtr_pref = 1
net.ipv6.conf.veth43.accept_redirects = 1
net.ipv6.conf.veth43.accept_source_route = 0
sysctl: permission denied on key 'vm.mmap_rnd_bits'
sysctl: permission denied on key 'vm.mmap_rnd_compat_bits'
sysctl: permission denied on key 'vm.stat_refresh'