[....] 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. [ 81.414477][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 81.414488][ T27] audit: type=1800 audit(1583379975.062:29): pid=10178 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 [ 81.441681][ T27] audit: type=1800 audit(1583379975.062:30): pid=10178 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 '10.128.10.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.818106][T10331] IPVS: ftp: loaded support on port[0] = 21 [ 91.861907][T10332] ------------[ cut here ]------------ [ 91.867755][T10332] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 91.876875][T10332] WARNING: CPU: 1 PID: 10332 at lib/debugobjects.c:485 debug_print_object+0x168/0x250 [ 91.886433][T10332] Kernel panic - not syncing: panic_on_warn set ... [ 91.893015][T10332] CPU: 1 PID: 10332 Comm: syz-executor676 Not tainted 5.6.0-rc2-syzkaller #0 [ 91.901757][T10332] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.911802][T10332] Call Trace: [ 91.915094][T10332] dump_stack+0x197/0x210 [ 91.919420][T10332] ? debug_print_object+0x160/0x250 [ 91.924634][T10332] panic+0x2e3/0x75c [ 91.928522][T10332] ? add_taint.cold+0x16/0x16 [ 91.933201][T10332] ? __kasan_check_write+0x14/0x20 [ 91.938309][T10332] ? __warn.cold+0x14/0x3e [ 91.942723][T10332] ? __warn+0xd9/0x1cf [ 91.946794][T10332] ? debug_print_object+0x168/0x250 [ 91.952130][T10332] __warn.cold+0x2f/0x3e [ 91.956372][T10332] ? debug_print_object+0x168/0x250 [ 91.961596][T10332] report_bug+0x289/0x300 [ 91.965921][T10332] do_error_trap+0x11b/0x200 [ 91.970529][T10332] do_invalid_op+0x37/0x50 [ 91.974988][T10332] ? debug_print_object+0x168/0x250 [ 91.980180][T10332] invalid_op+0x23/0x30 [ 91.984325][T10332] RIP: 0010:debug_print_object+0x168/0x250 [ 91.990119][T10332] Code: dd c0 e2 91 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd c0 e2 91 88 48 c7 c7 20 d8 91 88 e8 e7 a9 9f fd <0f> 0b 83 05 e3 c4 ff 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 92.009763][T10332] RSP: 0018:ffffc9000629f0b0 EFLAGS: 00010286 [ 92.015865][T10332] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 92.023838][T10332] RDX: 0000000000000000 RSI: ffffffff815eae46 RDI: fffff52000c53e08 [ 92.031794][T10332] RBP: ffffc9000629f0f0 R08: ffff88808e9d82c0 R09: fffffbfff16a3770 [ 92.039769][T10332] R10: fffffbfff16a376f R11: ffffffff8b51bb7f R12: 0000000000000001 [ 92.047731][T10332] R13: ffffffff89bac120 R14: 0000000000000000 R15: 1ffff92000c53e24 [ 92.055738][T10332] ? vprintk_func+0x86/0x189 [ 92.060348][T10332] debug_object_activate+0x346/0x470 [ 92.065633][T10332] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 92.071451][T10332] ? debug_object_init_on_stack+0x20/0x20 [ 92.077291][T10332] ? mark_lock+0xc2/0x1220 [ 92.081710][T10332] ? find_held_lock+0x35/0x130 [ 92.086486][T10332] ? delayed_work_timer_fn+0x90/0x90 [ 92.091768][T10332] call_rcu+0x2f/0x700 [ 92.095876][T10332] ? trace_hardirqs_on+0x67/0x240 [ 92.100911][T10332] queue_rcu_work+0x8a/0xa0 [ 92.105416][T10332] ? __route4_delete_filter+0xe0/0xe0 [ 92.110784][T10332] tcf_queue_work+0xd3/0x110 [ 92.115371][T10332] route4_change+0x19e8/0x2250 [ 92.120133][T10332] ? route4_destroy+0x850/0x850 [ 92.124977][T10332] ? __kasan_check_write+0x14/0x20 [ 92.130136][T10332] ? wait_for_completion+0x440/0x440 [ 92.135418][T10332] ? route4_destroy+0x850/0x850 [ 92.140272][T10332] tc_new_tfilter+0xb82/0x2480 [ 92.145043][T10332] ? tc_del_tfilter+0x1560/0x1560 [ 92.150757][T10332] ? __kasan_check_read+0x11/0x20 [ 92.155785][T10332] ? __lock_acquire+0x8a0/0x4a00 [ 92.160718][T10332] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.166962][T10332] ? rtnetlink_rcv_msg+0x7e3/0xaf0 [ 92.172071][T10332] ? find_held_lock+0x35/0x130 [ 92.176867][T10332] ? rcu_read_lock_held_common+0x130/0x130 [ 92.182675][T10332] ? tc_del_tfilter+0x1560/0x1560 [ 92.187699][T10332] ? __kasan_check_read+0x11/0x20 [ 92.192717][T10332] ? tc_del_tfilter+0x1560/0x1560 [ 92.197736][T10332] rtnetlink_rcv_msg+0x824/0xaf0 [ 92.202671][T10332] ? rtnl_bridge_getlink+0x910/0x910 [ 92.207945][T10332] ? lock_downgrade+0x920/0x920 [ 92.212791][T10332] ? netlink_deliver_tap+0x226/0xbf0 [ 92.218069][T10332] ? find_held_lock+0x35/0x130 [ 92.222831][T10332] netlink_rcv_skb+0x177/0x450 [ 92.227621][T10332] ? rtnl_bridge_getlink+0x910/0x910 [ 92.232904][T10332] ? netlink_ack+0xb50/0xb50 [ 92.237619][T10332] ? __kasan_check_read+0x11/0x20 [ 92.242774][T10332] ? netlink_deliver_tap+0x248/0xbf0 [ 92.248061][T10332] rtnetlink_rcv+0x1d/0x30 [ 92.252470][T10332] netlink_unicast+0x59e/0x7e0 [ 92.257266][T10332] ? netlink_attachskb+0x870/0x870 [ 92.262384][T10332] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 92.268097][T10332] ? __check_object_size+0x3d/0x437 [ 92.273295][T10332] netlink_sendmsg+0x91c/0xea0 [ 92.278061][T10332] ? netlink_unicast+0x7e0/0x7e0 [ 92.282994][T10332] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 92.288562][T10332] ? apparmor_socket_sendmsg+0x2a/0x30 [ 92.294014][T10332] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.300254][T10332] ? security_socket_sendmsg+0x8d/0xc0 [ 92.305722][T10332] ? netlink_unicast+0x7e0/0x7e0 [ 92.310657][T10332] sock_sendmsg+0xd7/0x130 [ 92.315066][T10332] ____sys_sendmsg+0x753/0x880 [ 92.319832][T10332] ? kernel_sendmsg+0x50/0x50 [ 92.324501][T10332] ? __fget_files+0x337/0x520 [ 92.329184][T10332] ? find_held_lock+0x35/0x130 [ 92.333951][T10332] ___sys_sendmsg+0x100/0x170 [ 92.338637][T10332] ? sendmsg_copy_msghdr+0x70/0x70 [ 92.343759][T10332] ? __kasan_check_read+0x11/0x20 [ 92.348794][T10332] ? __fget_files+0x359/0x520 [ 92.353488][T10332] ? ksys_dup3+0x3e0/0x3e0 [ 92.357995][T10332] ? __fget_light+0x1ad/0x270 [ 92.362671][T10332] ? __fdget+0x1b/0x20 [ 92.366762][T10332] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.373007][T10332] __sys_sendmsg+0x105/0x1d0 [ 92.377619][T10332] ? __sys_sendmsg_sock+0xc0/0xc0 [ 92.382647][T10332] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 92.389713][T10332] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.395266][T10332] ? do_syscall_64+0x26/0x790 [ 92.400064][T10332] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.406145][T10332] ? do_syscall_64+0x26/0x790 [ 92.410855][T10332] __x64_sys_sendmsg+0x78/0xb0 [ 92.415697][T10332] do_syscall_64+0xfa/0x790 [ 92.420282][T10332] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.426195][T10332] RIP: 0033:0x446709 [ 92.430078][T10332] 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 [ 92.449680][T10332] RSP: 002b:00007f027d0d1d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 92.458108][T10332] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446709 [ 92.466073][T10332] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 92.474033][T10332] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 92.481997][T10332] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 92.489981][T10332] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 92.499658][T10332] Kernel Offset: disabled [ 92.504108][T10332] Rebooting in 86400 seconds..