[ 60.549025][ T26] audit: type=1800 audit(1575094297.462:26): pid=9000 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 61.455897][ T26] kauditd_printk_skb: 2 callbacks suppressed [ 61.455909][ T26] audit: type=1800 audit(1575094298.422:29): pid=9000 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 [ 61.483654][ T26] audit: type=1800 audit(1575094298.422:30): pid=9000 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 Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.902281][ T9152] tipc: Started in network mode [ 68.907858][ T9152] tipc: Own node identity ff000000000000000000000000000001, cluster identity 4711 [ 68.918708][ T9152] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor837/9152 [ 68.928522][ T9152] caller is dst_cache_get+0x3d/0xb0 [ 68.933819][ T9152] CPU: 1 PID: 9152 Comm: syz-executor837 Not tainted 5.4.0-syzkaller #0 [ 68.942176][ T9152] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.952332][ T9152] Call Trace: [ 68.955734][ T9152] dump_stack+0x197/0x210 [ 68.960085][ T9152] debug_smp_processor_id.cold+0x87/0x97 [ 68.965737][ T9152] dst_cache_get+0x3d/0xb0 [ 68.970158][ T9152] tipc_udp_xmit.isra.0+0xc4/0xb80 [ 68.975272][ T9152] ? lock_downgrade+0x920/0x920 [ 68.980284][ T9152] ? tipc_udp_addr2str+0x170/0x170 [ 68.985561][ T9152] ? __kasan_check_read+0x11/0x20 [ 68.990848][ T9152] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 68.997110][ T9152] ? tipc_crypto_xmit+0xb3e/0x2c70 [ 69.002226][ T9152] ? bearer_get+0x16e/0x350 [ 69.006727][ T9152] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 69.012881][ T9152] ? rcu_read_lock_held+0x9c/0xb0 [ 69.018027][ T9152] ? rcu_read_lock_held_common+0x130/0x130 [ 69.023875][ T9152] tipc_udp_send_msg+0x3ea/0x490 [ 69.028814][ T9152] tipc_bearer_xmit_skb+0x219/0x480 [ 69.033991][ T9152] ? tipc_bearer_mtu+0x4e0/0x4e0 [ 69.038908][ T9152] ? tipc_disc_create+0x71f/0xad0 [ 69.043914][ T9152] tipc_enable_bearer+0xb18/0xd90 [ 69.048923][ T9152] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 69.054808][ T9152] ? tipc_bearer_xmit_skb+0x480/0x480 [ 69.060325][ T9152] ? nla_memcpy+0xb0/0xb0 [ 69.064662][ T9152] __tipc_nl_bearer_enable+0x2de/0x3a0 [ 69.070130][ T9152] ? __tipc_nl_bearer_enable+0x2de/0x3a0 [ 69.075754][ T9152] ? tipc_nl_bearer_disable+0x40/0x40 [ 69.081138][ T9152] ? nla_memcpy+0xb0/0xb0 [ 69.085481][ T9152] ? __nla_parse+0x43/0x60 [ 69.089896][ T9152] tipc_nl_bearer_enable+0x23/0x40 [ 69.095061][ T9152] genl_rcv_msg+0x67d/0xea0 [ 69.099564][ T9152] ? genl_family_rcv_msg_attrs_parse+0x300/0x300 [ 69.105961][ T9152] ? __kasan_check_read+0x11/0x20 [ 69.110981][ T9152] ? __lock_acquire+0x8a0/0x4a00 [ 69.116814][ T9152] ? find_held_lock+0x35/0x130 [ 69.121599][ T9152] netlink_rcv_skb+0x177/0x450 [ 69.127573][ T9152] ? genl_family_rcv_msg_attrs_parse+0x300/0x300 [ 69.134741][ T9152] ? netlink_ack+0xb50/0xb50 [ 69.139418][ T9152] ? __kasan_check_write+0x14/0x20 [ 69.145015][ T9152] ? netlink_deliver_tap+0x24a/0xbe0 [ 69.150291][ T9152] genl_rcv+0x29/0x40 [ 69.154569][ T9152] netlink_unicast+0x58c/0x7d0 [ 69.160847][ T9152] ? netlink_attachskb+0x870/0x870 [ 69.166640][ T9152] ? _copy_from_iter_full+0x25d/0x8c0 [ 69.172430][ T9152] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 69.178260][ T9152] ? __check_object_size+0x3d/0x437 [ 69.183579][ T9152] netlink_sendmsg+0x8ee/0xe60 [ 69.188343][ T9152] ? netlink_unicast+0x7d0/0x7d0 [ 69.193262][ T9152] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 69.198806][ T9152] ? apparmor_socket_sendmsg+0x2a/0x30 [ 69.204251][ T9152] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.210486][ T9152] ? security_socket_sendmsg+0x8d/0xc0 [ 69.215969][ T9152] ? netlink_unicast+0x7d0/0x7d0 [ 69.221067][ T9152] sock_sendmsg+0xd7/0x130 [ 69.225502][ T9152] ____sys_sendmsg+0x753/0x880 [ 69.230398][ T9152] ? kernel_sendmsg+0x50/0x50 [ 69.235091][ T9152] ? debug_object_active_state+0x28a/0x350 [ 69.241018][ T9152] ___sys_sendmsg+0x11d/0x1b0 [ 69.245692][ T9152] ? do_recvmmsg+0x7a0/0x7a0 [ 69.250265][ T9152] ? lockdep_hardirqs_on+0x421/0x5e0 [ 69.255629][ T9152] ? __kasan_check_read+0x11/0x20 [ 69.260861][ T9152] ? mark_lock+0xc2/0x1220 [ 69.265569][ T9152] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 69.272218][ T9152] ? __kasan_check_read+0x11/0x20 [ 69.277602][ T9152] ? __lock_acquire+0x16f2/0x4a00 [ 69.282664][ T9152] ? debug_object_deactivate+0x320/0x320 [ 69.288656][ T9152] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 69.294931][ T9152] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.301507][ T9152] ? __fget_light+0x1a9/0x230 [ 69.306202][ T9152] ? __fdget+0x1b/0x20 [ 69.310348][ T9152] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 69.316580][ T9152] __sys_sendmsg+0x105/0x1d0 [ 69.321194][ T9152] ? __sys_sendmsg_sock+0x1f0/0x1f0 [ 69.326410][ T9152] ? lockdep_hardirqs_on+0x421/0x5e0 [ 69.332426][ T9152] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.338458][ T9152] ? do_syscall_64+0x26/0x790 [ 69.343931][ T9152] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.350317][ T9152] ? do_syscall_64+0x26/0x790 [ 69.355013][ T9152] __x64_sys_sendmsg+0x78/0xb0 [ 69.359778][ T9152] do_syscall_64+0xfa/0x790 [ 69.364315][ T9152] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.370224][ T9152] RIP: 0033:0x444359 [ 69.374347][ T9152] 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 [ 69.395153][ T9152] RSP: 002b:00007ffc4e655068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 69.403576][ T9152] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444359 [ 69.411721][ T9152] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 69.419890][ T9152] RBP: 00000000006ce018 R08: 0000000000000044 R09: 00000000004002e0 [ 69.427849][ T9152] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000402000 [ 69.436500][ T9152] R13: 0000000000402090 R14: 0000000000000000 R15: 0000000000000000 [ 69.448959][ T9152] tipc: Enabled bearer , prio