[ 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 '10.128.1.3' (ECDSA) to the list of known hosts. syzkaller login: [ 296.522231][ T6867] IPVS: ftp: loaded support on port[0] = 21 [ 296.606537][ T6867] chnl_net:caif_netlink_parms(): no params data found [ 296.656578][ T6867] bridge0: port 1(bridge_slave_0) entered blocking state [ 296.664135][ T6867] bridge0: port 1(bridge_slave_0) entered disabled state [ 296.672767][ T6867] device bridge_slave_0 entered promiscuous mode [ 296.681572][ T6867] bridge0: port 2(bridge_slave_1) entered blocking state [ 296.688734][ T6867] bridge0: port 2(bridge_slave_1) entered disabled state [ 296.696268][ T6867] device bridge_slave_1 entered promiscuous mode [ 296.715092][ T6867] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 296.725845][ T6867] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 296.748858][ T6867] team0: Port device team_slave_0 added [ 296.756018][ T6867] team0: Port device team_slave_1 added [ 296.772296][ T6867] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 296.779297][ T6867] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 296.805322][ T6867] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 296.817446][ T6867] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 296.824456][ T6867] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 296.850405][ T6867] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 296.876565][ T6867] device hsr_slave_0 entered promiscuous mode [ 296.883265][ T6867] device hsr_slave_1 entered promiscuous mode [ 296.973402][ T6867] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 296.983043][ T6867] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 296.992743][ T6867] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 297.002988][ T6867] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 297.026249][ T6867] bridge0: port 2(bridge_slave_1) entered blocking state [ 297.033482][ T6867] bridge0: port 2(bridge_slave_1) entered forwarding state [ 297.041212][ T6867] bridge0: port 1(bridge_slave_0) entered blocking state [ 297.048352][ T6867] bridge0: port 1(bridge_slave_0) entered forwarding state [ 297.091846][ T6867] 8021q: adding VLAN 0 to HW filter on device bond0 [ 297.104191][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 297.115315][ T2545] bridge0: port 1(bridge_slave_0) entered disabled state [ 297.123878][ T2545] bridge0: port 2(bridge_slave_1) entered disabled state [ 297.131873][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 297.143849][ T6867] 8021q: adding VLAN 0 to HW filter on device team0 [ 297.154633][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 297.163603][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 297.170713][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 297.188293][ T2545] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 297.196679][ T2545] bridge0: port 2(bridge_slave_1) entered blocking state [ 297.203796][ T2545] bridge0: port 2(bridge_slave_1) entered forwarding state [ 297.223843][ T6867] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 297.234389][ T6867] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 297.248501][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 297.256843][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 297.265507][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 297.275233][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 297.283613][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 297.291309][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 297.309343][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 297.316680][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 297.331830][ T6867] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 297.349374][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 297.368329][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 297.376445][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 297.385217][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 297.394410][ T6867] device veth0_vlan entered promiscuous mode [ 297.407214][ T6867] device veth1_vlan entered promiscuous mode [ 297.426583][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 297.435383][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 297.444022][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 297.454512][ T6867] device veth0_macvtap entered promiscuous mode [ 297.464281][ T6867] device veth1_macvtap entered promiscuous mode [ 297.481043][ T6867] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 297.490374][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 297.500245][ T7073] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 297.512417][ T6867] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 297.519949][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 297.531154][ T6867] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 297.540888][ T6867] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 297.550033][ T6867] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 297.559506][ T6867] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 297.640998][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 316.858385][ T0] NOHZ: local_softirq_pending 08 [ 357.824549][ T0] NOHZ: local_softirq_pending 08 [ 378.292828][ T0] NOHZ: local_softirq_pending 08 [ 388.542726][ T0] NOHZ: local_softirq_pending 08 [ 409.012446][ T0] NOHZ: local_softirq_pending 08 [ 439.731514][ T0] NOHZ: local_softirq_pending 08 [ 449.969440][ T0] NOHZ: local_softirq_pending 08 [ 452.539373][ T1173] INFO: task syz-executor421:6867 blocked for more than 143 seconds. [ 452.547595][ T1173] Not tainted 5.9.0-rc1-syzkaller #0 [ 452.555308][ T1173] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 452.564421][ T1173] task:syz-executor421 state:D stack:24440 pid: 6867 ppid: 6866 flags:0x00004000 [ 452.574118][ T1173] Call Trace: [ 452.577495][ T1173] __schedule+0x8e5/0x21e0 [ 452.582535][ T1173] ? io_schedule_timeout+0x140/0x140 [ 452.587892][ T1173] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 452.594579][ T1173] ? mark_held_locks+0x9f/0xe0 [ 452.600367][ T1173] schedule+0xd0/0x2a0 [ 452.604440][ T1173] schedule_timeout+0x1d8/0x250 [ 452.610331][ T1173] ? usleep_range+0x170/0x170 [ 452.615001][ T1173] ? mark_held_locks+0x9f/0xe0 [ 452.620895][ T1173] ? _raw_spin_unlock_irq+0x1f/0x80 [ 452.626097][ T1173] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.632719][ T1173] ? trace_hardirqs_on+0x5f/0x220 [ 452.637728][ T1173] wait_for_completion+0x163/0x260 [ 452.643900][ T1173] ? wait_for_completion_interruptible+0x2e0/0x2e0 [ 452.650844][ T1173] ? lockdep_hardirqs_off+0x89/0xc0 [ 452.656110][ T1173] __flush_work+0x51f/0xab0 [ 452.661204][ T1173] ? queue_work_node+0x370/0x370 [ 452.666201][ T1173] ? debug_object_init_on_stack+0x20/0x20 [ 452.672526][ T1173] ? flush_workqueue_prep_pwqs+0x4f0/0x4f0 [ 452.678325][ T1173] ? mark_held_locks+0x9f/0xe0 [ 452.683702][ T1173] ? __cancel_work_timer+0x516/0x700 [ 452.688972][ T1173] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 452.695544][ T1173] __cancel_work_timer+0x5de/0x700 [ 452.701028][ T1173] ? try_to_grab_pending.part.0+0x7d0/0x7d0 [ 452.706932][ T1173] ? lock_acquire+0x1f1/0xad0 [ 452.712267][ T1173] ? __sock_release+0x86/0x280 [ 452.717018][ T1173] ? lock_release+0x8e0/0x8e0 [ 452.722323][ T1173] tls_sk_proto_close+0x4a7/0xaf0 [ 452.727334][ T1173] ? wait_on_pending_writer+0x3f0/0x3f0 [ 452.733555][ T1173] ? ip_mc_drop_socket+0x16/0x260 [ 452.738566][ T1173] inet_release+0x12e/0x280 [ 452.743688][ T1173] inet6_release+0x4c/0x70 [ 452.748093][ T1173] __sock_release+0xcd/0x280 [ 452.753255][ T1173] sock_close+0x18/0x20 [ 452.757519][ T1173] __fput+0x285/0x920 [ 452.762114][ T1173] ? __sock_release+0x280/0x280 [ 452.766953][ T1173] task_work_run+0xdd/0x190 [ 452.772115][ T1173] exit_to_user_mode_prepare+0x195/0x1c0 [ 452.777735][ T1173] syscall_exit_to_user_mode+0x59/0x2b0 [ 452.783889][ T1173] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 452.790150][ T1173] RIP: 0033:0x403960 [ 452.794023][ T1173] Code: Bad RIP value. [ 452.798085][ T1173] RSP: 002b:00007ffe2301cba8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 452.807445][ T1173] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000403960 [ 452.815841][ T1173] RDX: 00000000000000d8 RSI: 00000000200005c0 RDI: 0000000000000004 [ 452.824114][ T1173] RBP: 00007ffe2301cbb0 R08: 0000000000000000 R09: 00000000000000d8 [ 452.832469][ T1173] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe2301cbc0 [ 452.840846][ T1173] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 452.848827][ T1173] [ 452.848827][ T1173] Showing all locks held in the system: [ 452.857466][ T1173] 2 locks held by kworker/u4:3/29: [ 452.862959][ T1173] #0: ffff8880ae635e58 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x77f/0xe30 [ 452.872502][ T1173] #1: ffffffff89bd6b40 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x39/0x3e0 [ 452.882513][ T1173] 1 lock held by khungtaskd/1173: [ 452.887512][ T1173] #0: ffffffff89bd6b40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 452.897905][ T1173] 3 locks held by kworker/0:2/2832: [ 452.903452][ T1173] #0: ffff8880aa063d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x82b/0x1670 [ 452.914166][ T1173] #1: ffffc90009727da8 ((work_completion)(&(&sw_ctx_tx->tx_work.work)->work)){+.+.}-{0:0}, at: process_one_work+0x85f/0x1670 [ 452.927608][ T1173] #2: ffff8880a92850d8 (&ctx->tx_lock){+.+.}-{3:3}, at: tx_work_handler+0x127/0x190 [ 452.937519][ T1173] 1 lock held by in:imklog/6762: [ 452.942815][ T1173] #0: ffff8880a1aa9130 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 452.952394][ T1173] 1 lock held by syz-executor421/6867: [ 452.957829][ T1173] #0: ffff8880850e5c90 (&sb->s_type->i_mutex_key#13){+.+.}-{3:3}, at: __sock_release+0x86/0x280 [ 452.968928][ T1173] [ 452.972110][ T1173] ============================================= [ 452.972110][ T1173] [ 452.981011][ T1173] NMI backtrace for cpu 1 [ 452.985327][ T1173] CPU: 1 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 452.993541][ T1173] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.003567][ T1173] Call Trace: [ 453.006888][ T1173] dump_stack+0x18f/0x20d [ 453.011217][ T1173] nmi_cpu_backtrace.cold+0x70/0xb1 [ 453.016424][ T1173] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 453.022031][ T1173] nmi_trigger_cpumask_backtrace+0x1b3/0x223 [ 453.028028][ T1173] watchdog+0xd7d/0x1000 [ 453.032249][ T1173] ? reset_hung_task_detector+0x30/0x30 [ 453.037779][ T1173] kthread+0x3b5/0x4a0 [ 453.041822][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 453.046917][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 453.052053][ T1173] ret_from_fork+0x1f/0x30 [ 453.056553][ T1173] Sending NMI from CPU 1 to CPUs 0: [ 453.062422][ C0] NMI backtrace for cpu 0 [ 453.062428][ C0] CPU: 0 PID: 3912 Comm: systemd-journal Not tainted 5.9.0-rc1-syzkaller #0 [ 453.062435][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.062438][ C0] RIP: 0010:__lock_acquire+0x2a8/0x5640 [ 453.062450][ C0] Code: ea 03 48 89 45 08 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 de 35 00 00 48 8d 45 18 48 89 5d 10 48 89 c2 48 89 44 24 40 <48> b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 9d 35 [ 453.062454][ C0] RSP: 0018:ffffc900015b7800 EFLAGS: 00000046 [ 453.062461][ C0] RAX: ffff8880a9260c20 RBX: ffffffff89bd6b40 RCX: 000000000000002b [ 453.062466][ C0] RDX: ffff8880a9260c20 RSI: 0000000000000000 RDI: ffff8880a9260c18 [ 453.062471][ C0] RBP: ffff8880a9260c08 R08: 0000000000000000 R09: 0000000000000000 [ 453.062476][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 453.062481][ C0] R13: 0000000000000000 R14: ffff8880a9260300 R15: 0000000000000002 [ 453.062487][ C0] FS: 00007fc0d1d858c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 453.062491][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 453.062496][ C0] CR2: 00007fc0cf12e000 CR3: 0000000092a19000 CR4: 00000000001506f0 [ 453.062501][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 453.062506][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 453.062508][ C0] Call Trace: [ 453.062512][ C0] ? __x64_sys_open+0x119/0x1c0 [ 453.062516][ C0] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 453.062520][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 453.062523][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 453.062527][ C0] ? fs_reclaim_acquire+0xa1/0xf0 [ 453.062530][ C0] ? find_held_lock+0x2d/0x110 [ 453.062533][ C0] lock_acquire+0x1f1/0xad0 [ 453.062536][ C0] ? path_init+0x822/0x13c0 [ 453.062539][ C0] ? lock_release+0x8e0/0x8e0 [ 453.062543][ C0] ? lockdep_init_map_waits+0x26a/0x8a0 [ 453.062546][ C0] path_init+0x851/0x13c0 [ 453.062549][ C0] ? path_init+0x822/0x13c0 [ 453.062553][ C0] ? percpu_counter_add_batch+0x126/0x180 [ 453.062556][ C0] path_openat+0x185/0x2730 [ 453.062559][ C0] ? __lock_acquire+0x16cb/0x5640 [ 453.062563][ C0] ? path_lookupat+0x830/0x830 [ 453.062567][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 453.062570][ C0] ? lock_is_held_type+0xbb/0xf0 [ 453.062573][ C0] do_filp_open+0x17e/0x3c0 [ 453.062576][ C0] ? may_open_dev+0xf0/0xf0 [ 453.062579][ C0] ? __alloc_fd+0x28d/0x600 [ 453.062583][ C0] ? lock_downgrade+0x830/0x830 [ 453.062586][ C0] ? do_raw_spin_lock+0x120/0x2b0 [ 453.062589][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 453.062593][ C0] ? _raw_spin_unlock+0x24/0x40 [ 453.062596][ C0] ? __alloc_fd+0x28d/0x600 [ 453.062599][ C0] do_sys_openat2+0x16d/0x420 [ 453.062602][ C0] ? seccomp_notify_ioctl+0xd90/0xd90 [ 453.062606][ C0] ? strncpy_from_user+0x2bf/0x3e0 [ 453.062609][ C0] ? build_open_flags+0x650/0x650 [ 453.062613][ C0] ? getname_flags.part.0+0x1dd/0x4f0 [ 453.062616][ C0] __x64_sys_open+0x119/0x1c0 [ 453.062619][ C0] ? do_sys_open+0x140/0x140 [ 453.062623][ C0] ? __secure_computing+0x104/0x360 [ 453.062626][ C0] do_syscall_64+0x2d/0x70 [ 453.062629][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 453.062633][ C0] RIP: 0033:0x7fc0d1315840 [ 453.062644][ C0] Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 [ 453.062647][ C0] RSP: 002b:00007ffc2f702dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 453.062656][ C0] RAX: ffffffffffffffda RBX: 00007ffc2f7030d0 RCX: 00007fc0d1315840 [ 453.062661][ C0] RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000555ed0cd36e0 [ 453.062666][ C0] RBP: 000000000000000d R08: 00000000000001c0 R09: 00000000ffffffff [ 453.062671][ C0] R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff [ 453.062676][ C0] R13: 0000555ed0ccf040 R14: 00007ffc2f703090 R15: 0000555ed0cdd870 [ 453.062857][ T1173] Kernel panic - not syncing: hung_task: blocked tasks [ 453.456549][ T1173] CPU: 1 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc1-syzkaller #0 [ 453.464793][ T1173] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.474859][ T1173] Call Trace: [ 453.478128][ T1173] dump_stack+0x18f/0x20d [ 453.482491][ T1173] panic+0x2e3/0x75c [ 453.486465][ T1173] ? __warn_printk+0xf3/0xf3 [ 453.491032][ T1173] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 453.496636][ T1173] ? preempt_schedule_thunk+0x16/0x18 [ 453.502117][ T1173] ? watchdog.cold+0x5/0x16b [ 453.506679][ T1173] ? watchdog+0xa82/0x1000 [ 453.511089][ T1173] watchdog.cold+0x16/0x16b [ 453.515567][ T1173] ? reset_hung_task_detector+0x30/0x30 [ 453.521085][ T1173] kthread+0x3b5/0x4a0 [ 453.525126][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 453.530209][ T1173] ? __kthread_bind_mask+0xc0/0xc0 [ 453.535294][ T1173] ret_from_fork+0x1f/0x30 [ 453.541312][ T1173] Kernel Offset: disabled [ 453.545637][ T1173] Rebooting in 86400 seconds..