[....] 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. [ 80.279744][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 80.279757][ T27] audit: type=1800 audit(1583380162.162:29): pid=10094 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 [ 80.306962][ T27] audit: type=1800 audit(1583380162.162:30): pid=10094 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 '10.128.0.137' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 102.011914][T10248] IPVS: ftp: loaded support on port[0] = 21 [ 102.047086][T10249] ------------[ cut here ]------------ [ 102.052875][T10249] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 102.062567][T10249] WARNING: CPU: 0 PID: 10249 at lib/debugobjects.c:485 debug_print_object+0x168/0x250 [ 102.072124][T10249] Kernel panic - not syncing: panic_on_warn set ... [ 102.078767][T10249] CPU: 0 PID: 10249 Comm: syz-executor784 Not tainted 5.6.0-rc3-syzkaller #0 [ 102.087527][T10249] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.097586][T10249] Call Trace: [ 102.100924][T10249] dump_stack+0x197/0x210 [ 102.105280][T10249] ? debug_print_object+0x80/0x250 [ 102.110404][T10249] panic+0x2e3/0x75c [ 102.114285][T10249] ? add_taint.cold+0x16/0x16 [ 102.118960][T10249] ? __kasan_check_write+0x14/0x20 [ 102.124068][T10249] ? __warn.cold+0x14/0x3e [ 102.128487][T10249] ? __warn+0xd9/0x1cf [ 102.132544][T10249] ? debug_print_object+0x168/0x250 [ 102.137756][T10249] __warn.cold+0x2f/0x3e [ 102.142017][T10249] ? debug_print_object+0x168/0x250 [ 102.147214][T10249] report_bug+0x289/0x300 [ 102.151536][T10249] do_error_trap+0x11b/0x200 [ 102.156114][T10249] do_invalid_op+0x37/0x50 [ 102.160517][T10249] ? debug_print_object+0x168/0x250 [ 102.165796][T10249] invalid_op+0x23/0x30 [ 102.169944][T10249] RIP: 0010:debug_print_object+0x168/0x250 [ 102.175735][T10249] Code: dd 00 e7 91 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 00 e7 91 88 48 c7 c7 60 dc 91 88 e8 07 6e 9f fd <0f> 0b 83 05 03 6c ff 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 102.195331][T10249] RSP: 0018:ffffc9000660f0b0 EFLAGS: 00010286 [ 102.201382][T10249] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 102.209356][T10249] RDX: 0000000000000000 RSI: ffffffff815ebe46 RDI: fffff52000cc1e08 [ 102.217332][T10249] RBP: ffffc9000660f0f0 R08: ffff888091dda600 R09: ffffed1015d06659 [ 102.225296][T10249] R10: ffffed1015d06658 R11: ffff8880ae8332c7 R12: 0000000000000001 [ 102.233269][T10249] R13: ffffffff89bac220 R14: 0000000000000000 R15: 1ffff92000cc1e24 [ 102.241278][T10249] ? vprintk_func+0x86/0x189 [ 102.245871][T10249] debug_object_activate+0x346/0x470 [ 102.251147][T10249] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 102.256946][T10249] ? debug_object_init_on_stack+0x20/0x20 [ 102.262660][T10249] ? mark_lock+0xc2/0x1220 [ 102.267084][T10249] ? find_held_lock+0x35/0x130 [ 102.271912][T10249] ? delayed_work_timer_fn+0x90/0x90 [ 102.277214][T10249] call_rcu+0x2f/0x700 [ 102.281275][T10249] ? trace_hardirqs_on+0x67/0x240 [ 102.286641][T10249] queue_rcu_work+0x8a/0xa0 [ 102.291145][T10249] ? __route4_delete_filter+0xe0/0xe0 [ 102.296516][T10249] tcf_queue_work+0xd3/0x110 [ 102.301123][T10249] route4_change+0x19e8/0x2250 [ 102.305914][T10249] ? route4_destroy+0x850/0x850 [ 102.310791][T10249] ? __kasan_check_write+0x14/0x20 [ 102.315914][T10249] ? wait_for_completion+0x440/0x440 [ 102.321206][T10249] ? route4_destroy+0x850/0x850 [ 102.326080][T10249] tc_new_tfilter+0xb82/0x2480 [ 102.330869][T10249] ? tc_del_tfilter+0x1560/0x1560 [ 102.335897][T10249] ? __kasan_check_read+0x11/0x20 [ 102.340921][T10249] ? __lock_acquire+0x8a0/0x4a00 [ 102.345891][T10249] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 102.352163][T10249] ? rtnetlink_rcv_msg+0x7e3/0xaf0 [ 102.357281][T10249] ? find_held_lock+0x35/0x130 [ 102.362060][T10249] ? rcu_read_lock_held_common+0x130/0x130 [ 102.367880][T10249] ? tc_del_tfilter+0x1560/0x1560 [ 102.372932][T10249] ? __kasan_check_read+0x11/0x20 [ 102.378000][T10249] ? tc_del_tfilter+0x1560/0x1560 [ 102.383067][T10249] rtnetlink_rcv_msg+0x824/0xaf0 [ 102.388014][T10249] ? rtnl_bridge_getlink+0x910/0x910 [ 102.393313][T10249] ? lock_downgrade+0x920/0x920 [ 102.398197][T10249] ? netlink_deliver_tap+0x226/0xbf0 [ 102.403504][T10249] ? find_held_lock+0x35/0x130 [ 102.408288][T10249] netlink_rcv_skb+0x177/0x450 [ 102.413085][T10249] ? rtnl_bridge_getlink+0x910/0x910 [ 102.418388][T10249] ? netlink_ack+0xb50/0xb50 [ 102.423020][T10249] ? __kasan_check_read+0x11/0x20 [ 102.428661][T10249] ? netlink_deliver_tap+0x248/0xbf0 [ 102.433962][T10249] rtnetlink_rcv+0x1d/0x30 [ 102.438376][T10249] netlink_unicast+0x59e/0x7e0 [ 102.443144][T10249] ? netlink_attachskb+0x870/0x870 [ 102.448249][T10249] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 102.453981][T10249] ? __check_object_size+0x3d/0x437 [ 102.459192][T10249] netlink_sendmsg+0x91c/0xea0 [ 102.463959][T10249] ? netlink_unicast+0x7e0/0x7e0 [ 102.468886][T10249] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 102.474435][T10249] ? apparmor_socket_sendmsg+0x2a/0x30 [ 102.479887][T10249] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 102.486114][T10249] ? security_socket_sendmsg+0x8d/0xc0 [ 102.491565][T10249] ? netlink_unicast+0x7e0/0x7e0 [ 102.496511][T10249] sock_sendmsg+0xd7/0x130 [ 102.500976][T10249] ____sys_sendmsg+0x753/0x880 [ 102.505752][T10249] ? kernel_sendmsg+0x50/0x50 [ 102.510417][T10249] ? __fget_files+0x337/0x520 [ 102.515088][T10249] ? find_held_lock+0x35/0x130 [ 102.519848][T10249] ___sys_sendmsg+0x100/0x170 [ 102.524534][T10249] ? sendmsg_copy_msghdr+0x70/0x70 [ 102.529642][T10249] ? __kasan_check_read+0x11/0x20 [ 102.534691][T10249] ? __fget_files+0x359/0x520 [ 102.539549][T10249] ? ksys_dup3+0x3e0/0x3e0 [ 102.543997][T10249] ? __fget_light+0x1ad/0x270 [ 102.548670][T10249] ? __fdget+0x1b/0x20 [ 102.552910][T10249] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 102.559182][T10249] __sys_sendmsg+0x105/0x1d0 [ 102.563769][T10249] ? __sys_sendmsg_sock+0xc0/0xc0 [ 102.568785][T10249] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 102.574767][T10249] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 102.580382][T10249] ? do_syscall_64+0x26/0x790 [ 102.585058][T10249] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 102.591116][T10249] ? do_syscall_64+0x26/0x790 [ 102.595788][T10249] __x64_sys_sendmsg+0x78/0xb0 [ 102.600545][T10249] do_syscall_64+0xfa/0x790 [ 102.605082][T10249] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 102.610995][T10249] RIP: 0033:0x446709 [ 102.614887][T10249] Code: e8 1c ba 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 ab 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 102.634496][T10249] RSP: 002b:00007f8c81b2cd98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 102.642899][T10249] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446709 [ 102.650859][T10249] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 102.658839][T10249] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 102.666981][T10249] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 102.674968][T10249] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 102.684434][T10249] Kernel Offset: disabled [ 102.688867][T10249] Rebooting in 86400 seconds..