TCP: request_sock_TCP: Possible SYN flooding on port 20028. Sending cookies.  Check SNMP counters.
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 40s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    in-flight: 800:key_garbage_collector
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256
    pending: e1000_watchdog, vmstat_shepherd
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256
    pending: lru_add_drain_per_cpu BAR(5819), vmstat_update
pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=40s workers=4 idle: 1263 3928 18