[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.531785][ T27] audit: type=1800 audit(1576298550.925:25): pid=8866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.567938][ T27] audit: type=1800 audit(1576298550.925:26): pid=8866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.602455][ T27] audit: type=1800 audit(1576298550.935:27): pid=8866 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 '10.128.10.28' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 78.482090][ T9018] tipc: Started in network mode [ 78.487200][ T9018] tipc: Own node identity ff000000000000000000000000000001, cluster identity 4711 [ 78.497479][ T9018] check_preemption_disabled: 3 callbacks suppressed [ 78.497490][ T9018] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor964/9018 [ 78.514148][ T9018] caller is dst_cache_get+0x3d/0xb0 [ 78.519391][ T9018] CPU: 0 PID: 9018 Comm: syz-executor964 Not tainted 5.5.0-rc1-next-20191213-syzkaller #0 [ 78.529292][ T9018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.539349][ T9018] Call Trace: [ 78.542662][ T9018] dump_stack+0x197/0x210 [ 78.546985][ T9018] debug_smp_processor_id.cold+0x87/0x97 [ 78.552782][ T9018] dst_cache_get+0x3d/0xb0 [ 78.557189][ T9018] tipc_udp_xmit.isra.0+0xc0/0xaa0 [ 78.562285][ T9018] ? rcu_read_lock_held+0x9c/0xb0 [ 78.567346][ T9018] ? tipc_udp_addr2str+0x170/0x170 [ 78.572450][ T9018] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 78.578686][ T9018] ? tipc_crypto_xmit+0xb3e/0x2c70 [ 78.583775][ T9018] ? bearer_get+0x16e/0x350 [ 78.588263][ T9018] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 78.594406][ T9018] ? rcu_read_lock_held+0x9c/0xb0 [ 78.599423][ T9018] ? rcu_read_lock_held_common+0x130/0x130 [ 78.605210][ T9018] tipc_udp_send_msg+0x3ea/0x490 [ 78.610143][ T9018] tipc_bearer_xmit_skb+0x219/0x480 [ 78.615331][ T9018] ? tipc_bearer_mtu+0x4e0/0x4e0 [ 78.620247][ T9018] ? tipc_disc_create+0x71f/0xad0 [ 78.625254][ T9018] tipc_enable_bearer+0xb82/0xe30 [ 78.630273][ T9018] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 78.636147][ T9018] ? tipc_bearer_xmit_skb+0x480/0x480 [ 78.641519][ T9018] ? nla_memcpy+0xb0/0xb0 [ 78.645862][ T9018] __tipc_nl_bearer_enable+0x2de/0x3a0 [ 78.651445][ T9018] ? __tipc_nl_bearer_enable+0x2de/0x3a0 [ 78.657079][ T9018] ? tipc_nl_bearer_disable+0x40/0x40 [ 78.662451][ T9018] ? nla_memcpy+0xb0/0xb0 [ 78.666775][ T9018] ? __nla_parse+0x43/0x60 [ 78.671195][ T9018] tipc_nl_bearer_enable+0x23/0x40 [ 78.676291][ T9018] genl_rcv_msg+0x67d/0xea0 [ 78.680849][ T9018] ? genl_family_rcv_msg_attrs_parse+0x300/0x300 [ 78.687199][ T9018] ? __kasan_check_read+0x11/0x20 [ 78.692249][ T9018] ? __lock_acquire+0x8a0/0x4a00 [ 78.697215][ T9018] ? find_held_lock+0x35/0x130 [ 78.701971][ T9018] netlink_rcv_skb+0x177/0x450 [ 78.706728][ T9018] ? genl_family_rcv_msg_attrs_parse+0x300/0x300 [ 78.713050][ T9018] ? netlink_ack+0xb50/0xb50 [ 78.717616][ T9018] ? __kasan_check_write+0x14/0x20 [ 78.722711][ T9018] ? netlink_deliver_tap+0x248/0xbe0 [ 78.727978][ T9018] genl_rcv+0x29/0x40 [ 78.731940][ T9018] netlink_unicast+0x58c/0x7d0 [ 78.736684][ T9018] ? netlink_attachskb+0x870/0x870 [ 78.741777][ T9018] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 78.747476][ T9018] ? __check_object_size+0x3d/0x437 [ 78.752658][ T9018] netlink_sendmsg+0x91c/0xea0 [ 78.757514][ T9018] ? netlink_unicast+0x7d0/0x7d0 [ 78.762454][ T9018] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 78.768001][ T9018] ? apparmor_socket_sendmsg+0x2a/0x30 [ 78.773459][ T9018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.779698][ T9018] ? security_socket_sendmsg+0x8d/0xc0 [ 78.785197][ T9018] ? netlink_unicast+0x7d0/0x7d0 [ 78.790117][ T9018] sock_sendmsg+0xd7/0x130 [ 78.794564][ T9018] ____sys_sendmsg+0x753/0x880 [ 78.799308][ T9018] ? kernel_sendmsg+0x50/0x50 [ 78.804076][ T9018] ? debug_object_active_state+0x28a/0x350 [ 78.809892][ T9018] ? find_held_lock+0x35/0x130 [ 78.814686][ T9018] ___sys_sendmsg+0x100/0x170 [ 78.819370][ T9018] ? sendmsg_copy_msghdr+0x70/0x70 [ 78.824461][ T9018] ? lockdep_hardirqs_on+0x421/0x5e0 [ 78.829739][ T9018] ? __kasan_check_read+0x11/0x20 [ 78.834741][ T9018] ? mark_lock+0xc2/0x1220 [ 78.839142][ T9018] ? __kasan_check_read+0x11/0x20 [ 78.844145][ T9018] ? __lock_acquire+0x16f2/0x4a00 [ 78.849165][ T9018] ? debug_object_deactivate+0x320/0x320 [ 78.854776][ T9018] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 78.860929][ T9018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 78.867175][ T9018] ? __fget_light+0x1a9/0x230 [ 78.871847][ T9018] ? __fdget+0x1b/0x20 [ 78.875898][ T9018] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 78.882125][ T9018] __sys_sendmsg+0x105/0x1d0 [ 78.886697][ T9018] ? __sys_sendmsg_sock+0xc0/0xc0 [ 78.891716][ T9018] ? lockdep_hardirqs_on+0x421/0x5e0 [ 78.896995][ T9018] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 78.902434][ T9018] ? do_syscall_64+0x26/0x790 [ 78.907105][ T9018] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.913168][ T9018] ? do_syscall_64+0x26/0x790 [ 78.917832][ T9018] __x64_sys_sendmsg+0x78/0xb0 [ 78.922592][ T9018] do_syscall_64+0xfa/0x790 [ 78.927077][ T9018] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 78.932964][ T9018] RIP: 0033:0x444359 [ 78.936853][ T9018] 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 [ 78.956550][ T9018] RSP: 002b:00007ffde028f168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 78.964959][ T9018] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000444359 [ 78.972912][ T9018] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 78.980864][ T9018] RBP: 00000000006ce