executing program syzkaller login: [ 136.035761] device gre0 entered promiscuous mode [ 186.335077] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 50s! [ 186.335845] Showing busy workqueues and worker pools: [ 186.336378] workqueue events: flags=0x0 [ 186.336822] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 [ 186.337422] pending: e1000_watchdog, cache_reap [ 186.337948] workqueue events_power_efficient: flags=0x80 [ 186.338444] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 [ 186.338992] pending: check_lifetime [ 186.339370] workqueue mm_percpu_wq: flags=0x8 [ 186.339769] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 [ 186.340315] pending: vmstat_update [ 186.340698] workqueue ipv6_addrconf: flags=0x40008 [ 186.341150] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 [ 186.341732] pending: addrconf_dad_work