Warning: Permanently added '10.128.0.193' (ECDSA) to the list of known hosts. executing program [ 716.153911][ T29] INFO: task kworker/0:3:1147 blocked for more than 143 seconds. [ 716.161754][ T29] Not tainted 5.19.0-rc3-syzkaller-00145-gab84db251c04 #0 [ 716.169505][ T29] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.178277][ T29] task:kworker/0:3 state:D stack:27664 pid: 1147 ppid: 2 flags:0x00004000 [ 716.187606][ T29] Workqueue: ipv6_addrconf addrconf_verify_work [ 716.193994][ T29] Call Trace: [ 716.197347][ T29] [ 716.200318][ T29] __schedule+0xa00/0x4b50 [ 716.204915][ T29] ? find_held_lock+0x2d/0x110 [ 716.209720][ T29] ? wq_worker_sleeping+0x1e5/0x250 [ 716.215026][ T29] ? mark_held_locks+0x9f/0xe0 [ 716.219821][ T29] ? rwlock_bug.part.0+0x90/0x90 [ 716.224901][ T29] ? io_schedule_timeout+0x140/0x140 [ 716.230213][ T29] ? lockdep_hardirqs_on+0x79/0x100 [ 716.235629][ T29] schedule+0xd2/0x1f0 [ 716.239738][ T29] schedule_preempt_disabled+0xf/0x20 [ 716.245259][ T29] __mutex_lock+0xa70/0x1350 [ 716.249878][ T29] ? addrconf_verify_work+0xe/0x20 [ 716.255098][ T29] ? mutex_lock_io_nested+0x1190/0x1190 [ 716.260658][ T29] ? lock_release+0x780/0x780 [ 716.265457][ T29] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 716.271468][ T29] addrconf_verify_work+0xe/0x20 [ 716.276527][ T29] process_one_work+0x996/0x1610 [ 716.281493][ T29] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 716.287015][ T29] ? rwlock_bug.part.0+0x90/0x90 [ 716.291983][ T29] ? _raw_spin_lock_irq+0x41/0x50 [ 716.297142][ T29] worker_thread+0x665/0x1080 [ 716.301844][ T29] ? __kthread_parkme+0x15f/0x220 [ 716.307189][ T29] ? process_one_work+0x1610/0x1610 [ 716.312457][ T29] kthread+0x2e9/0x3a0 [ 716.316668][ T29] ? kthread_complete_and_exit+0x40/0x40 [ 716.322439][ T29] ret_from_fork+0x1f/0x30 [ 716.327013][ T29] [ 716.330159][ T29] [ 716.330159][ T29] Showing all locks held in the system: [ 716.337987][ T29] 1 lock held by khungtaskd/29: [ 716.342887][ T29] #0: ffffffff8bd86ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 716.353484][ T29] 3 locks held by kworker/1:2/146: [ 716.358708][ T29] #0: ffff888025e05538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 [ 716.369772][ T29] #1: ffffc90002a0fda8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 [ 716.382940][ T29] #2: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xe/0x20 [ 716.392467][ T29] 3 locks held by kworker/0:3/1147: [ 716.397743][ T29] #0: ffff888025e05538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 [ 716.408795][ T29] #1: ffffc90004f5fda8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 [ 716.421947][ T29] #2: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xe/0x20 [ 716.431510][ T29] 2 locks held by getty/3289: [ 716.436271][ T29] #0: ffff88814a6b8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 [ 716.446195][ T29] #1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 [ 716.456410][ T29] 1 lock held by syz-executor389/3544: [ 716.461884][ T29] #0: ffffffff8d58e828 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x180 [ 716.471038][ T29] [ 716.473385][ T29] ============================================= [ 716.473385][ T29] [ 716.481903][ T29] NMI backtrace for cpu 0 [ 716.486248][ T29] CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc3-syzkaller-00145-gab84db251c04 #0 [ 716.496155][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.506209][ T29] Call Trace: [ 716.509490][ T29] [ 716.512418][ T29] dump_stack_lvl+0xcd/0x134 [ 716.517066][ T29] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.522363][ T29] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.527567][ T29] nmi_trigger_cpumask_backtrace+0x1e6/0x230 [ 716.533601][ T29] watchdog+0xc22/0xf90 [ 716.537769][ T29] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 716.543790][ T29] kthread+0x2e9/0x3a0 [ 716.547876][ T29] ? kthread_complete_and_exit+0x40/0x40 [ 716.553542][ T29] ret_from_fork+0x1f/0x30 [ 716.557991][ T29] [ 716.561132][ T29] Sending NMI from CPU 0 to CPUs 1: [ 716.566380][ C1] NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1c9/0x240 [ 716.567452][ T29] Kernel panic - not syncing: hung_task: blocked tasks [ 716.582974][ T29] CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc3-syzkaller-00145-gab84db251c04 #0 [ 716.592881][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.602946][ T29] Call Trace: [ 716.606232][ T29] [ 716.609177][ T29] dump_stack_lvl+0xcd/0x134 [ 716.613791][ T29] panic+0x2d7/0x64a [ 716.617727][ T29] ? panic_print_sys_info.part.0+0x10b/0x10b [ 716.623739][ T29] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.628963][ T29] ? preempt_schedule_thunk+0x16/0x18 [ 716.634349][ T29] ? watchdog.cold+0x5/0x143 [ 716.639004][ T29] watchdog.cold+0x16/0x143 [ 716.643526][ T29] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 716.649524][ T29] kthread+0x2e9/0x3a0 [ 716.653613][ T29] ? kthread_complete_and_exit+0x40/0x40 [ 716.659275][ T29] ret_from_fork+0x1f/0x30 [ 716.663721][ T29] [ 716.666937][ T29] Kernel Offset: disabled [ 716.671278][ T29] Rebooting in 86400 seconds..