INFO: task kworker/R-ipv6_:3151 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/R-ipv6_ state:D stack:29448 pid:3151  ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work