Debian GNU/Linux 7 syzkaller ttyS0

executing program
syzkaller login: [  250.848102] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 32s!
[  250.848771] Showing busy workqueues and worker pools:
[  250.849170] workqueue events: flags=0x0
[  250.849485]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  250.849946]     pending: cache_reap
[  250.850218] workqueue events_power_efficient: flags=0x80
[  250.850614]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  250.851093]     pending: fb_flashcursor
[  250.851456] workqueue mm_percpu_wq: flags=0x8
[  250.851797]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  250.852270]     pending: vmstat_update
[  250.852604] workqueue ipv6_addrconf: flags=0x40008
[  250.852960]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1
[  250.853425]     pending: addrconf_dad_work