[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[   58.085381][ T9624] sshd (9624) used greatest stack depth: 24152 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.
[   58.276414][   T26] kauditd_printk_skb: 7 callbacks suppressed
[   58.276427][   T26] audit: type=1800 audit(1565452966.419:29): pid=9548 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0
[   58.319230][   T26] audit: type=1800 audit(1565452966.429:30): pid=9548 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.174' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   64.670368][ T9697] Started in network mode
[   64.674734][ T9697] Own node identity ff030000000000000000000000000001, cluster identity 4711
[   64.683820][ T9697] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor600/9697
[   64.693365][ T9697] caller is debug_smp_processor_id+0x1c/0x20
[   64.699384][ T9697] CPU: 0 PID: 9697 Comm: syz-executor600 Not tainted 5.3.0-rc3+ #70
[   64.707355][ T9697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   64.717389][ T9697] Call Trace:
[   64.720693][ T9697]  dump_stack+0x1d8/0x2f8
[   64.725029][ T9697]  check_preemption_disabled+0x257/0x2a0
[   64.730650][ T9697]  debug_smp_processor_id+0x1c/0x20
[   64.735826][ T9697]  dst_cache_get+0x57/0x490
[   64.740305][ T9697]  ? __copy_skb_header+0x41f/0x540
[   64.745391][ T9697]  tipc_udp_xmit+0x5d/0xb20
[   64.749873][ T9697]  ? trace_lock_release+0x135/0x1a0
[   64.755051][ T9697]  ? rcu_lock_release+0x9/0x30
[   64.759794][ T9697]  tipc_udp_send_msg+0x32d/0x3d0
[   64.764714][ T9697]  tipc_bearer_xmit_skb+0x29f/0x3b0
[   64.769893][ T9697]  __tipc_nl_bearer_enable+0xa77/0xd50
[   64.775326][ T9697]  tipc_nl_bearer_enable+0x22/0x30
[   64.780411][ T9697]  genl_rcv_msg+0xb52/0x12b0
[   64.784980][ T9697]  netlink_rcv_skb+0x19e/0x3d0
[   64.789717][ T9697]  ? genl_unbind+0x250/0x250
[   64.794288][ T9697]  genl_rcv+0x28/0x40
[   64.798242][ T9697]  netlink_unicast+0x787/0x900
[   64.802989][ T9697]  netlink_sendmsg+0x993/0xc50
[   64.807727][ T9697]  ? netlink_getsockopt+0x9f0/0x9f0
[   64.812915][ T9697]  ___sys_sendmsg+0x60d/0x910
[   64.817566][ T9697]  ? trace_lock_release+0x135/0x1a0
[   64.822750][ T9697]  ? task_work_run+0x139/0x1b0
[   64.827489][ T9697]  ? _raw_spin_unlock_irq+0x27/0x80
[   64.832662][ T9697]  ? trace_irq_enable_rcuidle+0x23/0x1e0
[   64.838269][ T9697]  ? check_preemption_disabled+0xb7/0x2a0
[   64.843977][ T9697]  ? __kasan_check_write+0x14/0x20
[   64.849086][ T9697]  ? __fdget+0x156/0x200
[   64.853320][ T9697]  __x64_sys_sendmsg+0x17c/0x200
[   64.858239][ T9697]  do_syscall_64+0xfe/0x140
[   64.862725][ T9697]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   64.868612][ T9697] RIP: 0033:0x444359
[   64.872483][ T9697] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 0f 83 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
[   64.892068][ T9697] RSP: 002b:00007ffc2c140848 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   64.900476][ T9697] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444359
[   64.908444][ T9697] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003
[   64.916410][ T9697] RBP: 00000000006ce018 R08: 00000000000