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-next-kasan-gce-0,10.128.0.60' (ECDSA) to the list of known hosts.
net.ipv6.conf.syz0.accept_dad = 0
net.ipv6.conf.syz4.accept_dad = 0
net.ipv6.conf.syz2.accept_dad = 0
net.ipv6.conf.syz5.accept_dad = 0
net.ipv6.conf.syz7.accept_dad = 0
net.ipv6.conf.syz3.accept_dad = 0
net.ipv6.conf.syz6.accept_dad = 0
net.ipv6.conf.syz0.router_solicitations = 0
net.ipv6.conf.syz1.accept_dad = 0
net.ipv6.conf.syz2.router_solicitations = 0
net.ipv6.conf.syz4.router_solicitations = 0
net.ipv6.conf.syz1.router_solicitations = 0
net.ipv6.conf.syz5.router_solicitations = 0
net.ipv6.conf.syz7.router_solicitations = 0
net.ipv6.conf.syz3.router_solicitations = 0
net.ipv6.conf.syz6.router_solicitations = 0
executing program
executing program
syzkaller login: [  177.514394] device gre0 entered promiscuous mode
[  177.545330] device gre0 entered promiscuous mode
[  214.495040] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 36s!
[  214.503210] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 36s!
[  214.511297] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 32s!
[  214.519542] BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 32s!
[  214.527174] Showing busy workqueues and worker pools:
[  214.532373] workqueue events: flags=0x0
[  214.536415]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  214.542617]     pending: cache_reap
[  214.546254]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
[  214.552391]     pending: vmstat_shepherd, cache_reap, check_corruption
[  214.559082] workqueue events_long: flags=0x0
[  214.563488]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  214.569627]     pending: gc_worker
[  214.573173] workqueue events_power_efficient: flags=0x80
[  214.578626]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
[  214.584762]     pending: neigh_periodic_work, do_cache_clean, neigh_periodic_work
[  214.592406] workqueue mm_percpu_wq: flags=0x8
[  214.596897]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  214.603031]     pending: vmstat_update
[  214.606922]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  214.613056]     pending: vmstat_update
[  214.616952] workqueue writeback: flags=0x4e
[  214.621311]   pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256
[  214.627063]     pending: wb_workfn
[  214.630616] workqueue kblockd: flags=0x18
[  214.634759]   pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256
[  214.641164]     pending: blk_timeout_work
[  214.645334] workqueue ipv6_addrconf: flags=0x40008
[  214.650259]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1
[  214.656221]     pending: addrconf_dad_work
[  214.660441]     delayed: addrconf_dad_work, addrconf_dad_work, addrconf_dad_work
[  214.667990]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1
[  214.673955]     pending: addrconf_dad_work
[  214.678173]     delayed: addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work, addrconf_dad_work