[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.471634][ T26] audit: type=1800 audit(1567381735.938:25): pid=8364 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.516978][ T26] audit: type=1800 audit(1567381735.938:26): pid=8364 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.547509][ T26] audit: type=1800 audit(1567381735.948:27): pid=8364 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.186' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.849361][ T8518] Started in network mode [ 70.853759][ T8518] Own node identity ff030000000000000000000000000001, cluster identity 4711 [ 70.862926][ T8518] check_preemption_disabled: 3 callbacks suppressed [ 70.862936][ T8518] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor273/8518 [ 70.879262][ T8518] caller is dst_cache_get+0x3d/0xb0 [ 70.884855][ T8518] CPU: 1 PID: 8518 Comm: syz-executor273 Not tainted 5.3.0-rc6-next-20190830 #75 [ 70.893928][ T8518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.903952][ T8518] Call Trace: [ 70.907217][ T8518] dump_stack+0x172/0x1f0 [ 70.911527][ T8518] debug_smp_processor_id.cold+0x87/0x9d [ 70.917132][ T8518] dst_cache_get+0x3d/0xb0 [ 70.921525][ T8518] tipc_udp_xmit.isra.0+0xc4/0xb80 [ 70.926612][ T8518] ? tipc_udp_addr2str+0x170/0x170 [ 70.931695][ T8518] ? __kasan_check_read+0x11/0x20 [ 70.936688][ T8518] ? __lock_acquire+0x8a0/0x4a00 [ 70.941600][ T8518] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 70.947380][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.953595][ T8518] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 70.959724][ T8518] ? rcu_read_lock_held+0x9c/0xb0 [ 70.964721][ T8518] ? rcu_read_lock_held_common+0x130/0x130 [ 70.970501][ T8518] tipc_udp_send_msg+0x3ea/0x490 [ 70.975416][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.981719][ T8518] tipc_bearer_xmit_skb+0x17e/0x370 [ 70.986890][ T8518] tipc_enable_bearer+0xacf/0xd30 [ 70.991905][ T8518] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 70.997786][ T8518] ? tipc_bearer_xmit_skb+0x370/0x370 [ 71.003145][ T8518] ? nla_memcpy+0xb0/0xb0 [ 71.007457][ T8518] __tipc_nl_bearer_enable+0x2de/0x3a0 [ 71.012886][ T8518] ? __tipc_nl_bearer_enable+0x2de/0x3a0 [ 71.018499][ T8518] ? tipc_nl_bearer_disable+0x40/0x40 [ 71.023848][ T8518] ? nla_memcpy+0xb0/0xb0 [ 71.028154][ T8518] ? lock_acquire+0x190/0x410 [ 71.032808][ T8518] tipc_nl_bearer_enable+0x23/0x40 [ 71.037893][ T8518] genl_family_rcv_msg+0x74b/0xf90 [ 71.042981][ T8518] ? genl_unregister_family+0x7b0/0x7b0 [ 71.048507][ T8518] ? __kasan_check_read+0x11/0x20 [ 71.053507][ T8518] ? __lock_acquire+0x16f2/0x4a00 [ 71.058524][ T8518] genl_rcv_msg+0xca/0x170 [ 71.062916][ T8518] netlink_rcv_skb+0x177/0x450 [ 71.067652][ T8518] ? genl_family_rcv_msg+0xf90/0xf90 [ 71.072909][ T8518] ? netlink_ack+0xb50/0xb50 [ 71.077473][ T8518] ? __kasan_check_write+0x14/0x20 [ 71.082558][ T8518] ? netlink_deliver_tap+0x254/0xbf0 [ 71.087832][ T8518] genl_rcv+0x29/0x40 [ 71.091786][ T8518] netlink_unicast+0x531/0x710 [ 71.096524][ T8518] ? netlink_attachskb+0x7c0/0x7c0 [ 71.101610][ T8518] ? _copy_from_iter_full+0x25d/0x8c0 [ 71.106973][ T8518] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 71.112676][ T8518] ? __check_object_size+0x3d/0x437 [ 71.117848][ T8518] netlink_sendmsg+0x8a5/0xd60 [ 71.122587][ T8518] ? netlink_unicast+0x710/0x710 [ 71.127499][ T8518] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 71.133019][ T8518] ? apparmor_socket_sendmsg+0x2a/0x30 [ 71.138450][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.144662][ T8518] ? security_socket_sendmsg+0x8d/0xc0 [ 71.150106][ T8518] ? netlink_unicast+0x710/0x710 [ 71.155029][ T8518] sock_sendmsg+0xd7/0x130 [ 71.159419][ T8518] ___sys_sendmsg+0x803/0x920 [ 71.164070][ T8518] ? copy_msghdr_from_user+0x440/0x440 [ 71.169518][ T8518] ? lock_downgrade+0x920/0x920 [ 71.174356][ T8518] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 71.180149][ T8518] ? lockdep_hardirqs_on+0x418/0x5d0 [ 71.185408][ T8518] ? __kasan_check_read+0x11/0x20 [ 71.190405][ T8518] ? mark_lock+0xc2/0x1220 [ 71.194793][ T8518] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 71.200660][ T8518] ? __kasan_check_read+0x11/0x20 [ 71.205659][ T8518] ? __lock_acquire+0x16f2/0x4a00 [ 71.210656][ T8518] ? debug_object_deactivate+0x320/0x320 [ 71.216263][ T8518] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 71.222416][ T8518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.228645][ T8518] ? __fget_light+0x1a9/0x230 [ 71.233293][ T8518] ? __fdget+0x1b/0x20 [ 71.237345][ T8518] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.243573][ T8518] __sys_sendmsg+0x105/0x1d0 [ 71.248156][ T8518] ? __sys_sendmsg_sock+0xd0/0xd0 [ 71.253158][ T8518] ? lockdep_hardirqs_on+0x418/0x5d0 [ 71.258423][ T8518] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 71.263855][ T8518] ? do_syscall_64+0x26/0x760 [ 71.268521][ T8518] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.274558][ T8518] ? do_syscall_64+0x26/0x760 [ 71.279213][ T8518] __x64_sys_sendmsg+0x78/0xb0 [ 71.283951][ T8518] do_syscall_64+0xfa/0x760 [ 71.288434][ T8518] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.294313][ T8518] RIP: 0033:0x444359 [ 71.298183][ T8518] 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 [ 71.317758][ T8518] RSP: 002b:00007ffd89be4b18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 71.326142][ T8518] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444359 [ 71.334085][ T8518] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 71.342034][ T8518] RBP: 00000000006ce018 R08: 0000000000000044 R09: 00000000004002e0 [ 71.349997][ T8