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-7,10.128.15.202' (ECDSA) to the list of known hosts.
executing program
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syzkaller login: [  126.032092] device gre0 entered promiscuous mode
[  182.751041] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 56s!
[  182.759199] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 56s!
[  182.767303] BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 51s!
[  182.774936] Showing busy workqueues and worker pools:
[  182.780136] workqueue events: flags=0x0
[  182.784172]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  182.790371]     pending: cache_reap
[  182.794021]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
[  182.800160]     pending: once_deferred, vmstat_shepherd, cache_reap
[  182.806587] workqueue events_long: flags=0x0
[  182.810990]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  182.817129]     pending: gc_worker
[  182.820852] workqueue events_power_efficient: flags=0x80
[  182.826297]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  182.832435]     pending: check_lifetime
[  182.836414]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
[  182.842549]     pending: neigh_periodic_work, neigh_periodic_work, do_cache_clean
[  182.850193] workqueue mm_percpu_wq: flags=0x8
[  182.854680]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  182.860815]     pending: vmstat_update
[  182.864704]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
[  182.870841]     pending: vmstat_update
[  182.874734] workqueue writeback: flags=0x4e
[  182.879090]   pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256
[  182.884841]     pending: wb_workfn
[  182.888388] workqueue kblockd: flags=0x18
[  182.892531]   pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256
[  182.898840]     pending: blk_timeout_work
[  182.903028] workqueue ipv6_addrconf: flags=0x40008
[  182.907952]   pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1
[  182.913915]     pending: addrconf_dad_work