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-9,10.128.15.207' (ECDSA) to the list of known hosts.
executing program
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syzkaller login: [   87.894331] device gre0 entered promiscuous mode
[  121.823041] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 33s!
[  121.831209] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 33s!
[  121.839305] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 33s!
[  121.847550] Showing busy workqueues and worker pools:
[  121.852745] workqueue events: flags=0x0
[  121.856782]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  121.862976]     pending: cache_reap
[  121.866610]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256
[  121.872745]     pending: vmstat_shepherd, cache_reap
[  121.877860] workqueue events_long: flags=0x0
[  121.882260]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  121.888396]     pending: gc_worker
[  121.891946] workqueue events_power_efficient: flags=0x80
[  121.897386]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256
[  121.903519]     pending: neigh_periodic_work, do_cache_clean, reg_check_chans_work
[  121.911248]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  121.917386]     pending: neigh_periodic_work
[  121.921802] workqueue mm_percpu_wq: flags=0x8
[  121.926289]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  121.932424]     pending: vmstat_update
[  121.936317]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  121.942452]     pending: vmstat_update
[  121.946347] workqueue writeback: flags=0x4e
[  121.950703]   pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256
[  121.956454]     pending: wb_workfn
[  121.960000] workqueue kblockd: flags=0x18
[  121.964157]   pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256
[  121.970477]     pending: blk_timeout_work
[  121.974644] workqueue ipv6_addrconf: flags=0x40008
[  121.979563]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1
[  121.985528]     pending: addrconf_dad_work