INIT: Entering runlevel: 2

[info] Using makefile-style concurrent boot in runlevel 2.
[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added 'ci-upstream-kasan-gce-386-2,10.128.15.204' (ECDSA) to the list of known hosts.
net.ipv6.conf.syz5.accept_dad = 0
net.ipv6.conf.syz2.accept_dad = 0
net.ipv6.conf.syz6.accept_dad = 0
net.ipv6.conf.syz1.accept_dad = 0
net.ipv6.conf.syz4.accept_dad = 0
net.ipv6.conf.syz0.accept_dad = 0
net.ipv6.conf.syz3.accept_dad = 0
net.ipv6.conf.syz7.accept_dad = 0
net.ipv6.conf.syz2.router_solicitations = 0
net.ipv6.conf.syz6.router_solicitations = 0
net.ipv6.conf.syz0.router_solicitations = 0
net.ipv6.conf.syz5.router_solicitations = 0
net.ipv6.conf.syz3.router_solicitations = 0
net.ipv6.conf.syz1.router_solicitations = 0
net.ipv6.conf.syz4.router_solicitations = 0
net.ipv6.conf.syz7.router_solicitations = 0
executing program
syzkaller login: [  221.214054] device gre0 entered promiscuous mode
[  275.424041] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 54s!
[  275.432161] Showing busy workqueues and worker pools:
[  275.437359] workqueue events: flags=0x0
[  275.441380]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  275.447542]     pending: cache_reap
[  275.451175] workqueue events_power_efficient: flags=0x80
[  275.456613]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256
[  275.462735]     pending: neigh_periodic_work, do_cache_clean
[  275.468543] workqueue mm_percpu_wq: flags=0x8
[  275.473033]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  275.479156]     pending: vmstat_update
[  275.483058] workqueue kblockd: flags=0x18
[  275.487194]   pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256
[  275.493490]     pending: blk_timeout_work
[  275.497656] workqueue ipv6_addrconf: flags=0x40008
[  275.502571]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1
[  275.508520]     pending: addrconf_dad_work
[  275.512734]     delayed: addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work