[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.91' (ECDSA) to the list of known hosts. syzkaller login: [ 76.535208] IPVS: ftp: loaded support on port[0] = 21 [ 76.713497] IPVS: ftp: loaded support on port[0] = 21 [ 99.308969] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [kworker/u4:1:23] [ 99.316505] Modules linked in: [ 99.319697] irq event stamp: 22753 [ 99.323242] hardirqs last enabled at (22752): [] trace_hardirqs_on_thunk+0x1a/0x1c [ 99.332586] hardirqs last disabled at (22753): [] trace_hardirqs_off_thunk+0x1a/0x1c [ 99.342014] softirqs last enabled at (18234): [] tipc_shutdown+0x121/0x310 [ 99.350660] softirqs last disabled at (18236): [] tipc_topsrv_exit_net+0x283/0x5c0 [ 99.360708] CPU: 1 PID: 23 Comm: kworker/u4:1 Not tainted 4.19.211-syzkaller #0 [ 99.368133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 99.377574] Workqueue: netns cleanup_net [ 99.381623] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 [ 99.387067] Code: ff 48 89 df e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 [ 99.406120] RSP: 0018:ffff8880b5047bd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 99.413988] RAX: 0000000000000000 RBX: 00000000258470c4 RCX: ffffffff87eef30a [ 99.421250] RDX: 0000000000000000 RSI: ffffffff87eef456 RDI: 0000000000000006 [ 99.428610] RBP: ffff8880a8c9ea00 R08: 0000000000000001 R09: 00000000258470c4 [ 99.435862] R10: 0000000000000006 R11: 0000000000000000 R12: ffff8880a8c9ea50 [ 99.443305] R13: ffffed1015193d51 R14: ffff88808ac45080 R15: 0000000000000000 [ 99.450573] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 99.458879] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.464743] CR2: 00007ffdc216f438 CR3: 00000000b4daf000 CR4: 00000000003406e0 [ 99.472092] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 99.479354] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 99.486690] Call Trace: [ 99.489373] tipc_topsrv_exit_net+0x288/0x5c0 [ 99.494018] ? tipc_topsrv_init_net+0xb90/0xb90 [ 99.498781] ops_exit_list+0xa5/0x150 [ 99.502655] cleanup_net+0x3b4/0x8b0 [ 99.506379] ? net_drop_ns+0x90/0x90 [ 99.510103] ? check_preemption_disabled+0x10/0x280 [ 99.515134] process_one_work+0x864/0x1570 [ 99.519368] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 99.524064] worker_thread+0x64c/0x1130 [ 99.528050] ? process_one_work+0x1570/0x1570 [ 99.532533] kthread+0x33f/0x460 [ 99.535885] ? kthread_park+0x180/0x180 [ 99.539861] ret_from_fork+0x24/0x30 [ 99.543568] Kernel panic - not syncing: softlockup: hung tasks [ 99.549609] CPU: 1 PID: 23 Comm: kworker/u4:1 Tainted: G L 4.19.211-syzkaller #0 [ 99.558533] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 99.567890] Workqueue: netns cleanup_net [ 99.571947] Call Trace: [ 99.574552] [ 99.576724] dump_stack+0x1fc/0x2ef [ 99.580344] panic+0x26a/0x50e [ 99.583535] ? __warn_printk+0xf3/0xf3 [ 99.587454] ? watchdog_timer_fn.cold+0x5/0x25 [ 99.592033] ? watchdog_timer_fn+0x53e/0x580 [ 99.596436] watchdog_timer_fn.cold+0x16/0x25 [ 99.600923] __hrtimer_run_queues+0x3f6/0xe60 [ 99.605413] ? softlockup_fn+0xb0/0xb0 [ 99.609288] ? hrtimer_fixup_free+0xa0/0xa0 [ 99.613592] ? kvm_clock_get_cycles+0x14/0x30 [ 99.618065] ? ktime_get_update_offsets_now+0x2ec/0x460 [ 99.623515] hrtimer_interrupt+0x326/0x9e0 [ 99.627753] smp_apic_timer_interrupt+0x10c/0x550 [ 99.632935] apic_timer_interrupt+0xf/0x20 [ 99.637212] [ 99.639558] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 [ 99.644919] Code: ff 48 89 df e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 [ 99.663892] RSP: 0018:ffff8880b5047bd8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 99.671588] RAX: 0000000000000000 RBX: 00000000258470c4 RCX: ffffffff87eef30a [ 99.678847] RDX: 0000000000000000 RSI: ffffffff87eef456 RDI: 0000000000000006 [ 99.686109] RBP: ffff8880a8c9ea00 R08: 0000000000000001 R09: 00000000258470c4 [ 99.693378] R10: 0000000000000006 R11: 0000000000000000 R12: ffff8880a8c9ea50 [ 99.700626] R13: ffffed1015193d51 R14: ffff88808ac45080 R15: 0000000000000000 [ 99.707925] ? __radix_tree_lookup+0xca/0x370 [ 99.712447] ? __radix_tree_lookup+0x216/0x370 [ 99.717018] tipc_topsrv_exit_net+0x288/0x5c0 [ 99.721802] ? tipc_topsrv_init_net+0xb90/0xb90 [ 99.726459] ops_exit_list+0xa5/0x150 [ 99.730240] cleanup_net+0x3b4/0x8b0 [ 99.733988] ? net_drop_ns+0x90/0x90 [ 99.737725] ? check_preemption_disabled+0x10/0x280 [ 99.742742] process_one_work+0x864/0x1570 [ 99.746970] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 99.751628] worker_thread+0x64c/0x1130 [ 99.755601] ? process_one_work+0x1570/0x1570 [ 99.760169] kthread+0x33f/0x460 [ 99.763515] ? kthread_park+0x180/0x180 [ 99.767480] ret_from_fork+0x24/0x30 [ 99.771452] Kernel Offset: disabled [ 99.775136] Rebooting in 86400 seconds..