[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 28.748111] kauditd_printk_skb: 7 callbacks suppressed [ 28.748122] audit: type=1800 audit(1544510991.200:29): pid=5866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 28.775088] audit: type=1800 audit(1544510991.200:30): pid=5866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.641245] sshd (6005) used greatest stack depth: 15744 bytes left Warning: Permanently added '10.128.0.187' (ECDSA) to the list of known hosts. 2018/12/11 06:58:31 parsed 1 programs 2018/12/11 06:58:34 executed programs: 0 [ 551.645637] IPVS: ftp: loaded support on port[0] = 21 [ 551.903026] bridge0: port 1(bridge_slave_0) entered blocking state [ 551.909897] bridge0: port 1(bridge_slave_0) entered disabled state [ 551.917449] device bridge_slave_0 entered promiscuous mode [ 551.936219] bridge0: port 2(bridge_slave_1) entered blocking state [ 551.942676] bridge0: port 2(bridge_slave_1) entered disabled state [ 551.949547] device bridge_slave_1 entered promiscuous mode [ 551.967941] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 551.986598] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 552.037235] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 552.057402] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 552.137043] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 552.144369] team0: Port device team_slave_0 added [ 552.161717] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 552.168797] team0: Port device team_slave_1 added [ 552.185495] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 552.206436] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 552.226531] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 552.245844] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 552.393490] bridge0: port 2(bridge_slave_1) entered blocking state [ 552.399955] bridge0: port 2(bridge_slave_1) entered forwarding state [ 552.406955] bridge0: port 1(bridge_slave_0) entered blocking state [ 552.413324] bridge0: port 1(bridge_slave_0) entered forwarding state [ 552.939021] 8021q: adding VLAN 0 to HW filter on device bond0 [ 552.991361] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 553.042864] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 553.048987] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 553.057377] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 553.106938] 8021q: adding VLAN 0 to HW filter on device team0 [ 700.780854] INFO: task syz-executor0:6414 blocked for more than 140 seconds. [ 700.788273] Not tainted 4.20.0-rc6+ #274 [ 700.793446] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 700.801769] syz-executor0 D22360 6414 6035 0x20020004 [ 700.807494] Call Trace: [ 700.810119] __schedule+0x8cf/0x21d0 [ 700.817517] ? __sched_text_start+0x8/0x8 [ 700.821899] ? zap_class+0x640/0x640 [ 700.825629] ? lock_downgrade+0x900/0x900 [ 700.829794] ? check_preemption_disabled+0x48/0x280 [ 700.835078] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 700.840024] ? kasan_check_read+0x11/0x20 [ 700.844375] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 700.849649] ? find_held_lock+0x36/0x1c0 [ 700.853933] schedule+0xfe/0x460 [ 700.857293] ? __mutex_lock+0xafa/0x16f0 [ 700.861571] ? __schedule+0x21d0/0x21d0 [ 700.865705] ? kasan_check_read+0x11/0x20 [ 700.869862] ? do_raw_spin_unlock+0xa7/0x330 [ 700.874748] ? do_raw_spin_trylock+0x270/0x270 [ 700.879365] ? ww_mutex_lock.part.8+0xf0/0xf0 [ 700.884215] ? mutex_destroy+0x200/0x200 [ 700.888308] schedule_preempt_disabled+0x13/0x20 [ 700.893477] __mutex_lock+0xaff/0x16f0 [ 700.897448] ? ctrl_getfamily+0x313/0x420 [ 700.901968] ? mutex_trylock+0x2b0/0x2b0 [ 700.906050] ? find_held_lock+0x36/0x1c0 [ 700.910118] ? zap_class+0x640/0x640 [ 700.914257] ? find_held_lock+0x36/0x1c0 [ 700.918352] ? lock_acquire+0x1ed/0x520 [ 700.922680] ? ctrl_getfamily+0x305/0x420 [ 700.926851] ? lock_release+0xa00/0xa00 [ 700.931236] ? mutex_trylock+0x2b0/0x2b0 [ 700.935386] ? down_read+0x8d/0x120 [ 700.939025] ? ctrl_getfamily+0x305/0x420 [ 700.943567] ? __down_interruptible+0x700/0x700 [ 700.948316] ? __nla_parse+0x12c/0x3e0 [ 700.952620] mutex_lock_nested+0x16/0x20 [ 700.956783] ? mutex_lock_nested+0x16/0x20 [ 700.961371] ctrl_getfamily+0x313/0x420 [ 700.965387] genl_family_rcv_msg+0x8a7/0x11a0 [ 700.970414] ? genl_unregister_family+0x8a0/0x8a0 [ 700.975818] ? lock_downgrade+0x900/0x900 [ 700.979979] ? check_preemption_disabled+0x48/0x280 [ 700.985366] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 700.990310] ? kasan_check_read+0x11/0x20 [ 700.994848] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 701.000147] ? rcu_softirq_qs+0x20/0x20 [ 701.004596] genl_rcv_msg+0xc6/0x168 [ 701.008593] netlink_rcv_skb+0x172/0x440 [ 701.013050] ? genl_family_rcv_msg+0x11a0/0x11a0 [ 701.017827] ? netlink_ack+0xb80/0xb80 [ 701.022053] ? down_read+0x8d/0x120 [ 701.025711] genl_rcv+0x28/0x40 [ 701.028996] netlink_unicast+0x5a5/0x760 [ 701.033546] ? netlink_attachskb+0x9a0/0x9a0 [ 701.038054] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.043936] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 701.048976] netlink_sendmsg+0xa18/0xfc0 [ 701.053486] ? move_addr_to_kernel.part.18+0xc6/0x100 [ 701.058700] ? netlink_unicast+0x760/0x760 [ 701.063352] ? aa_sock_msg_perm.isra.14+0xba/0x160 [ 701.068306] ? apparmor_socket_sendmsg+0x29/0x30 [ 701.073472] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.079113] ? security_socket_sendmsg+0x94/0xc0 [ 701.084238] ? netlink_unicast+0x760/0x760 [ 701.088500] sock_sendmsg+0xd5/0x120 [ 701.092596] ___sys_sendmsg+0x7fd/0x930 [ 701.096593] ? find_held_lock+0x36/0x1c0 [ 701.101001] ? copy_msghdr_from_user+0x580/0x580 [ 701.105819] ? __fd_install+0x2b5/0x8f0 [ 701.109811] ? check_preemption_disabled+0x48/0x280 [ 701.115239] ? __fget_light+0x2e9/0x430 [ 701.119234] ? fget_raw+0x20/0x20 [ 701.123027] ? zap_class+0x640/0x640 [ 701.126769] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.132679] ? __fd_install+0x2f9/0x8f0 [ 701.136691] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 701.142565] ? sockfd_lookup_light+0xc5/0x160 [ 701.147085] __sys_sendmsg+0x11d/0x280 [ 701.151367] ? __ia32_sys_shutdown+0x80/0x80 [ 701.155845] ? perf_trace_sched_process_exec+0x860/0x860 [ 701.161684] ? usercopy_warn+0x110/0x110 [ 701.165785] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 701.171753] __ia32_compat_sys_socketcall+0xb81/0x1090 [ 701.177050] ? __x32_compat_sys_recvmmsg+0x150/0x150 [ 701.182547] ? trace_hardirqs_on+0xbd/0x310 [ 701.186886] ? entry_SYSENTER_compat+0x70/0x7f [ 701.191868] ? trace_hardirqs_off_caller+0x310/0x310 [ 701.197024] ? prepare_exit_to_usermode+0x342/0x3b0 [ 701.202411] ? trace_hardirqs_on+0x310/0x310 [ 701.206842] do_fast_syscall_32+0x34d/0xfb2 [ 701.211656] ? do_int80_syscall_32+0x890/0x890 [ 701.216256] ? entry_SYSENTER_compat+0x68/0x7f [ 701.221187] ? trace_hardirqs_off_caller+0xbb/0x310 [ 701.226224] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 701.231447] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 701.236309] ? trace_hardirqs_on_caller+0x310/0x310 [ 701.241763] ? prepare_exit_to_usermode+0x291/0x3b0 [ 701.246805] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 701.252044] entry_SYSENTER_compat+0x70/0x7f [ 701.256465] RIP: 0023:0xf7f35a29 [ 701.259851] Code: Bad RIP value. [ 701.263641] RSP: 002b:00000000f7f30e40 EFLAGS: 00000286 ORIG_RAX: 0000000000000066 [ 701.271719] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00000000f7f30e54 [ 701.279007] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000014 [ 701.286611] RBP: 00000000f7f31168 R08: 0000000000000000 R09: 0000000000000000 [ 701.294222] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 701.301806] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 701.309171] [ 701.309171] Showing all locks held in the system: [ 701.315876] 1 lock held by khungtaskd/1024: [ 701.320210] #0: 000000005be69ad1 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 [ 701.329214] 1 lock held by rsyslogd/5904: [ 701.333643] #0: 00000000d81b3b55 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 701.341977] 2 locks held by getty/5995: [ 701.345959] #0: 000000002216f599 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 701.354545] #1: 00000000d9dba276 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 701.363796] 2 locks held by getty/5996: [ 701.367779] #0: 00000000f9c213b5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 701.376357] #1: 00000000f440c0d4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 701.385523] 2 locks held by getty/5997: [ 701.389506] #0: 0000000046026358 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 701.398096] #1: 0000000043a55396 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 701.407274] 2 locks held by getty/5998: [ 701.411537] #0: 0000000005a3c150 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 701.419796] #1: 000000001a19e12f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 701.429063] 2 locks held by getty/5999: [ 701.433325] #0: 000000003bfb9865 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 701.441925] #1: 00000000c701a23a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 701.451122] 2 locks held by getty/6000: [ 701.455103] #0: 000000002c54a206 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 701.463784] #1: 000000002616eca3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 701.472978] 2 locks held by getty/6001: [ 701.476956] #0: 00000000cf1f4fc9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 701.485540] #1: 000000002f74c546 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 [ 701.494833] 2 locks held by syz-executor0/6414: [ 701.499510] #0: 00000000e5ede72f (cb_lock){++++}, at: ctrl_getfamily+0x305/0x420 [ 701.507521] #1: 0000000027f53533 (genl_mutex){+.+.}, at: ctrl_getfamily+0x313/0x420 [ 701.515712] 4 locks held by syz-executor0/6416: [ 701.520816] [ 701.522458] ============================================= [ 701.522458] [ 701.529475] NMI backtrace for cpu 1 [ 701.533164] CPU: 1 PID: 1024 Comm: khungtaskd Not tainted 4.20.0-rc6+ #274 [ 701.540179] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 701.549541] Call Trace: [ 701.552225] dump_stack+0x244/0x39d [ 701.555872] ? dump_stack_print_info.cold.1+0x20/0x20 [ 701.561076] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.566624] nmi_cpu_backtrace.cold.2+0x5c/0xa1 [ 701.571374] ? lapic_can_unplug_cpu.cold.27+0x3f/0x3f [ 701.576580] nmi_trigger_cpumask_backtrace+0x1e8/0x22a [ 701.581867] arch_trigger_cpumask_backtrace+0x14/0x20 [ 701.587074] watchdog+0xb51/0x1060 [ 701.590646] ? hungtask_pm_notify+0xb0/0xb0 [ 701.595007] ? __kthread_parkme+0xce/0x1a0 [ 701.599251] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 701.604371] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 701.609483] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 701.614075] ? trace_hardirqs_on+0xbd/0x310 [ 701.618402] ? kasan_check_read+0x11/0x20 [ 701.622554] ? __kthread_parkme+0xce/0x1a0 [ 701.626794] ? trace_hardirqs_off_caller+0x310/0x310 [ 701.631913] ? trace_hardirqs_off_caller+0x310/0x310 [ 701.637020] ? lockdep_init_map+0x9/0x10 [ 701.641089] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 701.646195] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 701.651736] ? __kthread_parkme+0xfb/0x1a0 [ 701.656006] ? hungtask_pm_notify+0xb0/0xb0 [ 701.660331] kthread+0x35a/0x440 [ 701.663714] ? kthread_stop+0x900/0x900 [ 701.667693] ret_from_fork+0x3a/0x50 [ 701.671509] Sending NMI from CPU 1 to CPUs 0: [ 701.678106] NMI backtrace for cpu 0 [ 701.678115] CPU: 0 PID: 6416 Comm: syz-executor0 Not tainted 4.20.0-rc6+ #274 [ 701.678129] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.924 msecs [ 701.678134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 701.678144] RIP: 0010:check_memory_region+0xbd/0x1b0 [ 701.678156] Code: c0 08 48 39 c3 0f 84 a8 00 00 00 48 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 0a 80 38 00 74 f2 48 85 c0 75 77 <5b> 41 5c 41 5d 5d c3 41 bd 08 00 00 00 4d 89 c8 41 29 dd 4b 8d 5c [ 701.678160] RSP: 0018:ffff8881b9bd6788 EFLAGS: 00000246 [ 701.678169] RAX: ffffed103b5c5b60 RBX: 1ffff1103b5c5b5f RCX: ffffffff816a6b32 [ 701.678175] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8881dae2daf8 [ 701.678181] RBP: ffff8881b9bd67a0 R08: ffffed103b5c5b60 R09: ffffed103b5c5b5f [ 701.678188] R10: ffffed103b5c5b5f R11: ffff8881dae2dafb R12: ffffed103b5c5b60 [ 701.678195] R13: ffff8881b9bd6828 R14: ffff8881dae2daf8 R15: ffff8881ba058dc0 [ 701.678202] FS: 0000000000000000(0000) GS:ffff8881dae00000(0063) knlGS:00000000f7f10b40 [ 701.678207] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 701.678214] CR2: ffffffffff600400 CR3: 00000001bd22d000 CR4: 00000000001406f0 [ 701.678221] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 701.678227] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 701.678230] Call Trace: [ 701.678235] kasan_check_read+0x11/0x20 [ 701.678240] rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 701.678244] ? rcu_softirq_qs+0x20/0x20 [ 701.678249] ? rcu_softirq_qs+0x20/0x20 [ 701.678253] rcu_is_watching+0x10/0x30 [ 701.678257] rcu_read_lock_held+0x87/0xc0 [ 701.678262] tipc_sk_lookup+0xadf/0xff0 [ 701.678266] ? write_comp_data+0x22/0x70 [ 701.678271] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 701.678276] ? tipc_connect+0x820/0x820 [ 701.678280] ? validate_nla+0x29a/0x1650 [ 701.678284] ? nla_memcmp+0x90/0x90 [ 701.678288] ? zap_class+0x640/0x640 [ 701.678293] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.678298] ? __nla_parse+0x12c/0x3e0 [ 701.678302] ? nla_parse+0x46/0x60 [ 701.678306] tipc_nl_publ_dump+0x22d/0xf93 [ 701.678311] ? tipc_nl_sk_dump+0x30/0x30 [ 701.678316] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 701.678320] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 701.678325] ? retint_kernel+0x2d/0x2d [ 701.678330] ? trace_hardirqs_on_caller+0xc0/0x310 [ 701.678345] ? trace_hardirqs_on_caller+0xc0/0x310 [ 701.678350] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 701.678355] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 701.678361] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 701.678365] ? retint_kernel+0x1b/0x2d [ 701.678370] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 701.678374] ? tipc_nl_sk_dump+0x30/0x30 [ 701.678380] ? __tipc_nl_compat_dumpit.isra.11+0x641/0xb60 [ 701.678385] __tipc_nl_compat_dumpit.isra.11+0x25d/0xb60 [ 701.678389] ? __alloc_skb+0x4c6/0x770 [ 701.678394] ? __tipc_add_link_prop.isra.9+0x2d0/0x2d0 [ 701.678399] ? skb_put+0x17b/0x1e0 [ 701.678403] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 701.678407] ? skb_put+0x17b/0x1e0 [ 701.678411] ? nla_put+0x117/0x150 [ 701.678416] tipc_nl_compat_sk_dump+0x88e/0xc50 [ 701.678421] ? __tipc_nl_compat_dumpit.isra.11+0xb60/0xb60 [ 701.678426] ? rcu_softirq_qs+0x20/0x20 [ 701.678430] ? zap_class+0x640/0x640 [ 701.678435] ? rhashtable_walk_next+0x2a9/0x6c0 [ 701.678439] ? tipc_nl_sk_dump+0x30/0x30 [ 701.678444] ? tipc_tlv_sprintf+0x2e0/0x2e0 [ 701.678449] ? rhashtable_walk_stop+0x1ca/0x450 [ 701.678453] ? release_sock+0x1ec/0x2c0 [ 701.678459] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.678464] ? __tipc_nl_compat_dumpit.isra.11+0xb60/0xb60 [ 701.678469] __tipc_nl_compat_dumpit.isra.11+0x389/0xb60 [ 701.678475] ? __tipc_add_link_prop.isra.9+0x2d0/0x2d0 [ 701.678479] ? lock_release+0xa00/0xa00 [ 701.678484] ? perf_trace_sched_process_exec+0x860/0x860 [ 701.678489] ? check_preemption_disabled+0x48/0x280 [ 701.678494] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 701.678498] ? skb_put+0x17b/0x1e0 [ 701.678503] tipc_nl_compat_dumpit+0x1f4/0x440 [ 701.678508] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 701.678513] tipc_nl_compat_recv+0x12b3/0x19a0 [ 701.678517] ? tipc_nl_compat_doit+0x650/0x650 [ 701.678522] ? tipc_dump_start+0x90/0x90 [ 701.678527] ? __tipc_nl_compat_dumpit.isra.11+0xb60/0xb60 [ 701.678532] ? find_held_lock+0x36/0x1c0 [ 701.678536] genl_family_rcv_msg+0x8a7/0x11a0 [ 701.678541] ? genl_unregister_family+0x8a0/0x8a0 [ 701.678546] ? lock_downgrade+0x900/0x900 [ 701.678551] ? check_preemption_disabled+0x48/0x280 [ 701.678555] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 701.678560] ? kasan_check_read+0x11/0x20 [ 701.678565] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 701.678569] ? rcu_softirq_qs+0x20/0x20 [ 701.678574] genl_rcv_msg+0xc6/0x168 [ 701.678578] netlink_rcv_skb+0x172/0x440 [ 701.678583] ? genl_family_rcv_msg+0x11a0/0x11a0 [ 701.678587] ? netlink_ack+0xb80/0xb80 [ 701.678591] ? down_read+0x8d/0x120 [ 701.678595] genl_rcv+0x28/0x40 [ 701.678600] netlink_unicast+0x5a5/0x760 [ 701.678604] ? netlink_attachskb+0x9a0/0x9a0 [ 701.678609] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.678615] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 701.678619] netlink_sendmsg+0xa18/0xfc0 [ 701.678623] ? netlink_unicast+0x760/0x760 [ 701.678628] ? aa_sock_msg_perm.isra.14+0xba/0x160 [ 701.678633] ? apparmor_socket_sendmsg+0x29/0x30 [ 701.678639] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.678643] ? security_socket_sendmsg+0x94/0xc0 [ 701.678648] ? netlink_unicast+0x760/0x760 [ 701.678652] sock_sendmsg+0xd5/0x120 [ 701.678656] ___sys_sendmsg+0x7fd/0x930 [ 701.678661] ? copy_msghdr_from_user+0x580/0x580 [ 701.678666] ? __fget_light+0x2e9/0x430 [ 701.678669] ? fget_raw+0x20/0x20 [ 701.678674] ? __might_fault+0x12b/0x1e0 [ 701.678678] ? lock_downgrade+0x900/0x900 [ 701.678683] ? lock_release+0xa00/0xa00 [ 701.678688] ? perf_trace_sched_process_exec+0x860/0x860 [ 701.678693] ? pvclock_read_flags+0x160/0x160 [ 701.678697] ? posix_ktime_get_ts+0x15/0x20 [ 701.678702] ? trace_hardirqs_off_caller+0x310/0x310 [ 701.678707] ? trace_hardirqs_on+0xbd/0x310 [ 701.678712] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 701.678717] ? sockfd_lookup_light+0xc5/0x160 [ 701.678720] __sys_sendmsg+0x11d/0x280 [ 701.678726] ? __ia32_sys_shutdown+0x80/0x80 [ 701.678731] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 701.678736] ? put_old_timespec32+0x110/0x280 [ 701.678740] ? do_fast_syscall_32+0x150/0xfb2 [ 701.678745] ? do_fast_syscall_32+0x150/0xfb2 [ 701.678750] ? trace_hardirqs_off_caller+0x310/0x310 [ 701.678756] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 701.678759] __ia32_compat_sys_sendmsg+0x7a/0xb0 [ 701.678766] do_fast_syscall_32+0x34d/0xfb2 [ 701.678770] ? do_int80_syscall_32+0x890/0x890 [ 701.678775] ? entry_SYSENTER_compat+0x68/0x7f [ 701.678780] ? trace_hardirqs_off_caller+0xbb/0x310 [ 701.678785] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 701.678790] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 701.678795] ? trace_hardirqs_on_caller+0x310/0x310 [ 701.678800] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 701.678805] ? prepare_exit_to_usermode+0x291/0x3b0 [ 701.678810] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 701.678814] entry_SYSENTER_compat+0x70/0x7f [ 701.678818] RIP: 0023:0xf7f35a29 [ 701.678832] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 701.678837] RSP: 002b:00000000f7f100cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 [ 701.678848] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020000180 [ 701.678855] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 701.678861] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 701.678868] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 701.678874] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 701.690637] Kernel panic - not syncing: hung_task: blocked tasks [ 702.433997] CPU: 1 PID: 1024 Comm: khungtaskd Not tainted 4.20.0-rc6+ #274 [ 702.441013] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 702.450366] Call Trace: [ 702.452965] dump_stack+0x244/0x39d [ 702.456606] ? dump_stack_print_info.cold.1+0x20/0x20 [ 702.461876] panic+0x2ad/0x55c [ 702.465083] ? add_taint.cold.5+0x16/0x16 [ 702.469246] ? nmi_trigger_cpumask_backtrace+0x1c8/0x22a [ 702.474711] ? nmi_trigger_cpumask_backtrace+0x1f9/0x22a [ 702.480162] ? nmi_trigger_cpumask_backtrace+0x1d1/0x22a [ 702.485629] ? nmi_trigger_cpumask_backtrace+0x1c8/0x22a [ 702.491092] watchdog+0xb62/0x1060 [ 702.494678] ? hungtask_pm_notify+0xb0/0xb0 [ 702.499036] ? __kthread_parkme+0xce/0x1a0 [ 702.503283] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 702.508391] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 702.513501] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 702.518115] ? trace_hardirqs_on+0xbd/0x310 [ 702.522447] ? kasan_check_read+0x11/0x20 [ 702.526602] ? __kthread_parkme+0xce/0x1a0 [ 702.530852] ? trace_hardirqs_off_caller+0x310/0x310 [ 702.535962] ? trace_hardirqs_off_caller+0x310/0x310 [ 702.541076] ? lockdep_init_map+0x9/0x10 [ 702.545148] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 702.550255] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 702.555796] ? __kthread_parkme+0xfb/0x1a0 [ 702.560046] ? hungtask_pm_notify+0xb0/0xb0 [ 702.564374] kthread+0x35a/0x440 [ 702.567746] ? kthread_stop+0x900/0x900 [ 702.571728] ret_from_fork+0x3a/0x50 [ 702.576583] Kernel Offset: disabled [ 702.580209] Rebooting in 86400 seconds..