[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.164' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 694.881648][ C0] hrtimer: interrupt took 209930 ns [ 859.048629][ C0] BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 140s! [ 859.048917][ C0] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 162s! [ 859.049069][ C0] Showing busy workqueues and worker pools: [ 859.049112][ C0] workqueue events: flags=0x0 [ 859.049189][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 859.049226][ C0] pending: ovs_dp_masks_rebalance [ 859.049307][ C0] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 [ 859.049342][ C0] pending: psi_avgs_work, vmstat_shepherd [ 859.049418][ C0] workqueue events_long: flags=0x0 [ 859.049477][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 859.049513][ C0] pending: defense_work_handler [ 859.049555][ C0] workqueue events_unbound: flags=0x2 [ 859.049646][ C0] pwq 4: cpus=0-1 flags=0x5 nice=0 active=2/512 refcnt=5 [ 859.049677][ C0] in-flight: 256:toggle_allocation_gate [ 859.049706][ C0] pending: flush_memcg_stats_dwork [ 859.049744][ C0] workqueue events_power_efficient: flags=0x80 [ 859.049794][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=5/256 refcnt=6 [ 859.049828][ C0] in-flight: 2990:fb_flashcursor [ 859.049855][ C0] pending: fb_flashcursor, neigh_periodic_work, do_cache_clean, gc_worker [ 859.049931][ C0] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 refcnt=4 [ 859.049966][ C0] in-flight: 1051:neigh_periodic_work [ 859.049991][ C0] pending: check_lifetime, neigh_periodic_work [ 859.050090][ C0] workqueue mm_percpu_wq: flags=0x8 [ 859.050152][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 859.050190][ C0] pending: vmstat_update [ 859.050225][ C0] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3 [ 859.050261][ C0] pending: lru_add_drain_per_cpu, vmstat_update [ 859.050338][ C0] workqueue writeback: flags=0x4a [ 859.050368][ C0] pwq 4: cpus=0-1 flags=0x5 nice=0 active=1/256 refcnt=4 [ 859.050401][ C0] pending: wb_workfn [ 859.050627][ C0] workqueue dm_bufio_cache: flags=0x8 [ 859.050657][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2 [ 859.050694][ C0] pending: work_fn [ 859.050823][ C0] workqueue ipv6_addrconf: flags=0x40008 [ 859.050872][ C0] pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2 [ 859.050908][ C0] pending: addrconf_verify_work [ 859.050978][ C0] workqueue krxrpcd: flags=0x0 [ 859.051036][ C0] pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1 refcnt=2 [ 859.051071][ C0] pending: rxrpc_peer_keepalive_worker [ 859.051175][ C0] pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=140s workers=2 idle: 5 [ 859.051263][ C0] pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=162s workers=2 idle: 20 [ 859.051338][ C0] pool 4: cpus=0-1 flags=0x5 nice=0 hung=130s workers=3 manager: 154 idle: 1204 [ 997.298676][ C1] ------------[ cut here ]------------ [ 997.298934][ C1] WARNING: CPU: 1 PID: 6531 at kernel/rcu/tree_stall.h:921 rcu_check_gp_start_stall.part.0+0x325/0x4b0 [ 997.298985][ C1] Modules linked in: [ 997.298997][ C1] CPU: 1 PID: 6531 Comm: syz-executor239 Not tainted 5.15.0-rc6-syzkaller #0 [ 997.299019][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 997.299031][ C1] RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 [ 997.299059][ C1] Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 e0 f7 24 90 e8 8e 7e 5b 00 b8 01 00 00 00 87 05 73 45 c2 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd c0 a8 98 8b 48 c7 c3 cc b4 6e 8d 74 58 48 b8 00 00 [ 997.299078][ C1] RSP: 0018:ffffc90000dc0e30 EFLAGS: 00010046 [ 997.299101][ C1] RAX: 0000000000000000 RBX: 000000010000d132 RCX: ffffffff8162b262 [ 997.299116][ C1] RDX: fffffbfff2049efc RSI: 0000000000000004 RDI: ffffffff9024f7e0 [ 997.299130][ C1] RBP: ffffffff8b98a8c0 R08: 0000000000000001 R09: 0000000000000003 [ 997.299144][ C1] R10: fffffbfff2049efc R11: 1ffff110173a6536 R12: 1ffffffff16c1e30 [ 997.299158][ C1] R13: 0000000000000246 R14: ffff8880b9d328d2 R15: 0000000000000008 [ 997.299174][ C1] FS: 00007f2a96ccd700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 997.299194][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 997.299209][ C1] CR2: 000055555575d2b8 CR3: 000000001a179000 CR4: 0000000000350ee0 [ 997.299224][ C1] Call Trace: [ 997.299230][ C1] [ 997.299239][ C1] rcu_core+0x4df/0x1470 [ 997.299265][ C1] ? call_timer_fn+0x6b0/0x6b0 [ 997.299291][ C1] ? trace_rcu_stall_warning+0x1b0/0x1b0 [ 997.299317][ C1] ? kvm_sched_clock_read+0x14/0x40 [ 997.299341][ C1] ? sched_clock_cpu+0x15/0x1f0 [ 997.299369][ C1] __do_softirq+0x29b/0x9c2 [ 997.299402][ C1] __irq_exit_rcu+0x123/0x180 [ 997.299427][ C1] irq_exit_rcu+0x5/0x20 [ 997.299448][ C1] sysvec_apic_timer_interrupt+0x93/0xc0 [ 997.299471][ C1] [ 997.299479][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 997.299505][ C1] RIP: 0010:__schedule+0xb4c/0x5960 [ 997.299525][ C1] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 70 4a 00 00 48 8b bd 40 ff ff ff 4c 89 63 10 4c 89 e6 e8 0c 9c c8 f7 48 89 c7 e8 d4 88 18 f8 <48> 8b b5 e8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 c7 04 06 00 [ 997.299544][ C1] RSP: 0018:ffffc90002fff738 EFLAGS: 00000202 [ 997.299561][ C1] RAX: 000000000277e1e3 RBX: 0000000000000001 RCX: 1ffffffff1adcaa9 [ 997.299575][ C1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 997.299587][ C1] RBP: ffffc90002fff888 R08: 0000000000000001 R09: 0000000000000001 [ 997.299601][ C1] R10: ffffffff817d01e8 R11: 0000000000000000 R12: ffff8880b9d32500 [ 997.299614][ C1] R13: 0000000000000000 R14: ffffffff8b332ca0 R15: ffffffff8b332ca0 [ 997.299632][ C1] ? trace_hardirqs_on+0x38/0x1c0 [ 997.299665][ C1] ? __schedule+0x3848/0x5960 [ 997.299685][ C1] ? __phys_addr+0xba/0x140 [ 997.299719][ C1] ? slab_free_freelist_hook+0x8b/0x1c0 [ 997.299745][ C1] ? io_schedule_timeout+0x140/0x140 [ 997.299766][ C1] ? tty_open+0x7e0/0x1000 [ 997.299790][ C1] ? kfree+0xf3/0x550 [ 997.299819][ C1] schedule+0xd3/0x270 [ 997.299839][ C1] tty_open+0x885/0x1000 [ 997.299868][ C1] ? tty_init_dev+0x80/0x80 [ 997.299890][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 997.299920][ C1] ? tty_init_dev+0x80/0x80 [ 997.299943][ C1] chrdev_open+0x266/0x770 [ 997.299964][ C1] ? cdev_device_add+0x210/0x210 [ 997.299984][ C1] ? fsnotify_perm.part.0+0x22d/0x620 [ 997.300017][ C1] do_dentry_open+0x4c8/0x11d0 [ 997.300045][ C1] ? cdev_device_add+0x210/0x210 [ 997.300064][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 997.300096][ C1] ? may_open+0x1f6/0x420 [ 997.300121][ C1] path_openat+0x1c9a/0x2740 [ 997.300155][ C1] ? path_lookupat+0x860/0x860 [ 997.300181][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 997.300215][ C1] do_filp_open+0x1aa/0x400 [ 997.300240][ C1] ? may_open_dev+0xf0/0xf0 [ 997.300273][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 997.300297][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 997.300321][ C1] ? _find_next_bit+0x1e3/0x260 [ 997.300350][ C1] ? _raw_spin_unlock+0x24/0x40 [ 997.300373][ C1] ? alloc_fd+0x2f0/0x670 [ 997.300402][ C1] do_sys_openat2+0x16d/0x4d0 [ 997.300424][ C1] ? build_open_flags+0x6f0/0x6f0 [ 997.300450][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 997.300481][ C1] __x64_sys_openat+0x13f/0x1f0 [ 997.300502][ C1] ? __ia32_sys_open+0x1c0/0x1c0 [ 997.300528][ C1] ? syscall_enter_from_user_mode+0x2b/0x70 [ 997.300557][ C1] do_syscall_64+0x35/0xb0 [ 997.300576][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 997.300600][ C1] RIP: 0033:0x7f2a96d1baf9 [ 997.300619][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 997.300638][ C1] RSP: 002b:00007f2a96ccd318 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 997.300658][ C1] RAX: ffffffffffffffda RBX: 00007f2a96da33e8 RCX: 00007f2a96d1baf9 [ 997.300673][ C1] RDX: 0000000000000802 RSI: 0000000020000840 RDI: ffffffffffffff9c [ 997.300687][ C1] RBP: 00007f2a96da33e0 R08: 0000000000000000 R09: 0000000000000000 [ 997.300701][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 7974742f7665642f [ 997.300715][ C1] R13: 00007fffcb9c666f R14: 00007f2a96ccd400 R15: 0000000000022000 [ 997.300744][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 997.300753][ C1] CPU: 1 PID: 6531 Comm: syz-executor239 Not tainted 5.15.0-rc6-syzkaller #0 [ 997.300775][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 997.300786][ C1] Call Trace: [ 997.300792][ C1] [ 997.300798][ C1] dump_stack_lvl+0xcd/0x134 [ 997.300822][ C1] panic+0x2b0/0x6dd [ 997.300843][ C1] ? __warn_printk+0xf3/0xf3 [ 997.300871][ C1] ? __warn.cold+0x1a/0x44 [ 997.300895][ C1] ? rcu_check_gp_start_stall.part.0+0x325/0x4b0 [ 997.300921][ C1] __warn.cold+0x35/0x44 [ 997.300942][ C1] ? rcu_check_gp_start_stall.part.0+0x325/0x4b0 [ 997.300968][ C1] report_bug+0x1bd/0x210 [ 997.300997][ C1] handle_bug+0x3c/0x60 [ 997.301016][ C1] exc_invalid_op+0x14/0x40 [ 997.301036][ C1] asm_exc_invalid_op+0x12/0x20 [ 997.301058][ C1] RIP: 0010:rcu_check_gp_start_stall.part.0+0x325/0x4b0 [ 997.301091][ C1] Code: 0f 88 fa 00 00 00 be 04 00 00 00 48 c7 c7 e0 f7 24 90 e8 8e 7e 5b 00 b8 01 00 00 00 87 05 73 45 c2 0e 85 c0 0f 85 c9 00 00 00 <0f> 0b 48 81 fd c0 a8 98 8b 48 c7 c3 cc b4 6e 8d 74 58 48 b8 00 00 [ 997.301110][ C1] RSP: 0018:ffffc90000dc0e30 EFLAGS: 00010046 [ 997.301127][ C1] RAX: 0000000000000000 RBX: 000000010000d132 RCX: ffffffff8162b262 [ 997.301141][ C1] RDX: fffffbfff2049efc RSI: 0000000000000004 RDI: ffffffff9024f7e0 [ 997.301155][ C1] RBP: ffffffff8b98a8c0 R08: 0000000000000001 R09: 0000000000000003 [ 997.301169][ C1] R10: fffffbfff2049efc R11: 1ffff110173a6536 R12: 1ffffffff16c1e30 [ 997.301183][ C1] R13: 0000000000000246 R14: ffff8880b9d328d2 R15: 0000000000000008 [ 997.301204][ C1] ? rcu_check_gp_start_stall.part.0+0x312/0x4b0 [ 997.301237][ C1] rcu_core+0x4df/0x1470 [ 997.301262][ C1] ? call_timer_fn+0x6b0/0x6b0 [ 997.301285][ C1] ? trace_rcu_stall_warning+0x1b0/0x1b0 [ 997.301310][ C1] ? kvm_sched_clock_read+0x14/0x40 [ 997.301333][ C1] ? sched_clock_cpu+0x15/0x1f0 [ 997.301361][ C1] __do_softirq+0x29b/0x9c2 [ 997.301392][ C1] __irq_exit_rcu+0x123/0x180 [ 997.301416][ C1] irq_exit_rcu+0x5/0x20 [ 997.301438][ C1] sysvec_apic_timer_interrupt+0x93/0xc0 [ 997.301460][ C1] [ 997.301468][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 997.301494][ C1] RIP: 0010:__schedule+0xb4c/0x5960 [ 997.301514][ C1] Code: fa 48 c1 ea 03 80 3c 02 00 0f 85 70 4a 00 00 48 8b bd 40 ff ff ff 4c 89 63 10 4c 89 e6 e8 0c 9c c8 f7 48 89 c7 e8 d4 88 18 f8 <48> 8b b5 e8 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 c7 04 06 00 [ 997.301533][ C1] RSP: 0018:ffffc90002fff738 EFLAGS: 00000202 [ 997.301550][ C1] RAX: 000000000277e1e3 RBX: 0000000000000001 RCX: 1ffffffff1adcaa9 [ 997.301564][ C1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 997.301576][ C1] RBP: ffffc90002fff888 R08: 0000000000000001 R09: 0000000000000001 [ 997.301588][ C1] R10: ffffffff817d01e8 R11: 0000000000000000 R12: ffff8880b9d32500 [ 997.301603][ C1] R13: 0000000000000000 R14: ffffffff8b332ca0 R15: ffffffff8b332ca0 [ 997.301621][ C1] ? trace_hardirqs_on+0x38/0x1c0 [ 997.301652][ C1] ? __schedule+0x3848/0x5960 [ 997.301672][ C1] ? __phys_addr+0xba/0x140 [ 997.301705][ C1] ? slab_free_freelist_hook+0x8b/0x1c0 [ 997.301731][ C1] ? io_schedule_timeout+0x140/0x140 [ 997.301751][ C1] ? tty_open+0x7e0/0x1000 [ 997.301773][ C1] ? kfree+0xf3/0x550 [ 997.301803][ C1] schedule+0xd3/0x270 [ 997.301823][ C1] tty_open+0x885/0x1000 [ 997.301851][ C1] ? tty_init_dev+0x80/0x80 [ 997.301873][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 997.301903][ C1] ? tty_init_dev+0x80/0x80 [ 997.301926][ C1] chrdev_open+0x266/0x770 [ 997.301946][ C1] ? cdev_device_add+0x210/0x210 [ 997.301965][ C1] ? fsnotify_perm.part.0+0x22d/0x620 [ 997.301998][ C1] do_dentry_open+0x4c8/0x11d0 [ 997.302025][ C1] ? cdev_device_add+0x210/0x210 [ 997.302044][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 997.302068][ C1] ? may_open+0x1f6/0x420 [ 997.302100][ C1] path_openat+0x1c9a/0x2740 [ 997.302134][ C1] ? path_lookupat+0x860/0x860 [ 997.302161][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 997.302194][ C1] do_filp_open+0x1aa/0x400 [ 997.302218][ C1] ? may_open_dev+0xf0/0xf0 [ 997.302251][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 997.302275][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 997.302299][ C1] ? _find_next_bit+0x1e3/0x260 [ 997.302327][ C1] ? _raw_spin_unlock+0x24/0x40 [ 997.302349][ C1] ? alloc_fd+0x2f0/0x670 [ 997.302376][ C1] do_sys_openat2+0x16d/0x4d0 [ 997.302399][ C1] ? build_open_flags+0x6f0/0x6f0 [ 997.302425][ C1] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 997.302456][ C1] __x64_sys_openat+0x13f/0x1f0 [ 997.302477][ C1] ? __ia32_sys_open+0x1c0/0x1c0 [ 997.302503][ C1] ? syscall_enter_from_user_mode+0x2b/0x70 [ 997.302530][ C1] do_syscall_64+0x35/0xb0 [ 997.302550][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 997.302574][ C1] RIP: 0033:0x7f2a96d1baf9 [ 997.302589][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 997.302608][ C1] RSP: 002b:00007f2a96ccd318 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 997.302629][ C1] RAX: ffffffffffffffda RBX: 00007f2a96da33e8 RCX: 00007f2a96d1baf9 [ 997.302643][ C1] RDX: 0000000000000802 RSI: 0000000020000840 RDI: ffffffffffffff9c [ 997.302656][ C1] RBP: 00007f2a96da33e0 R08: 0000000000000000 R09: 0000000000000000 [ 997.302670][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 7974742f7665642f [ 997.302683][ C1] R13: 00007fffcb9c666f R14: 00007f2a96ccd400 R15: 0000000000022000 [ 997.303806][ C1] Kernel Offset: disabled [ 998.636201][ C1] Rebooting in 86400 seconds..