[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.401476][ T27] audit: type=1800 audit(1584928684.810:25): pid=9535 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.421913][ T27] audit: type=1800 audit(1584928684.810:26): pid=9535 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.459299][ T27] audit: type=1800 audit(1584928684.810:27): pid=9535 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 '10.128.10.24' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.702950][ T9689] IPVS: ftp: loaded support on port[0] = 21 [ 76.737474][ T9690] ------------[ cut here ]------------ [ 76.743052][ T9690] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 76.752196][ T9690] WARNING: CPU: 1 PID: 9690 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 76.761633][ T9690] Kernel panic - not syncing: panic_on_warn set ... [ 76.768234][ T9690] CPU: 1 PID: 9690 Comm: syz-executor381 Not tainted 5.6.0-rc5-syzkaller #0 [ 76.776910][ T9690] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.786943][ T9690] Call Trace: [ 76.790233][ T9690] dump_stack+0x188/0x20d [ 76.794581][ T9690] ? debug_print_object+0x80/0x250 [ 76.799671][ T9690] panic+0x2e3/0x75c [ 76.803548][ T9690] ? add_taint.cold+0x16/0x16 [ 76.808208][ T9690] ? __probe_kernel_read+0x188/0x1d0 [ 76.813471][ T9690] ? __warn.cold+0x14/0x35 [ 76.817879][ T9690] ? __warn+0xd5/0x1c8 [ 76.821928][ T9690] ? debug_print_object+0x160/0x250 [ 76.827107][ T9690] __warn.cold+0x2f/0x35 [ 76.831330][ T9690] ? debug_print_object+0x160/0x250 [ 76.836505][ T9690] report_bug+0x27b/0x2f0 [ 76.840817][ T9690] do_error_trap+0x12b/0x220 [ 76.845402][ T9690] ? debug_print_object+0x160/0x250 [ 76.850582][ T9690] do_invalid_op+0x32/0x40 [ 76.854975][ T9690] ? debug_print_object+0x160/0x250 [ 76.860172][ T9690] invalid_op+0x23/0x30 [ 76.864316][ T9690] RIP: 0010:debug_print_object+0x160/0x250 [ 76.870102][ T9690] Code: dd c0 fa 71 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 fa 71 88 48 c7 c7 20 f0 71 88 e8 a8 bd b1 fd <0f> 0b 83 05 4b ef f3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 76.889719][ T9690] RSP: 0018:ffffc9000197f178 EFLAGS: 00010282 [ 76.895792][ T9690] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 76.903742][ T9690] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff5200032fe21 [ 76.911692][ T9690] RBP: 0000000000000001 R08: ffff8880982c65c0 R09: ffffed1015ce6659 [ 76.919645][ T9690] R10: ffffed1015ce6658 R11: ffff8880ae7332c7 R12: ffffffff899acba0 [ 76.927600][ T9690] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200032fe3c [ 76.935563][ T9690] ? vprintk_func+0x81/0x17e [ 76.940136][ T9690] ? debug_print_object+0x160/0x250 [ 76.945363][ T9690] ? lockdep_hardirqs_on+0x417/0x5d0 [ 76.950635][ T9690] debug_object_activate+0x346/0x470 [ 76.955900][ T9690] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 76.961714][ T9690] ? debug_object_init_on_stack+0x20/0x20 [ 76.967423][ T9690] ? find_held_lock+0x2d/0x110 [ 76.972218][ T9690] ? free_object+0x70/0x70 [ 76.976615][ T9690] ? lock_downgrade+0x7f0/0x7f0 [ 76.981452][ T9690] ? delayed_work_timer_fn+0x90/0x90 [ 76.986715][ T9690] call_rcu+0x2c/0x690 [ 76.990761][ T9690] queue_rcu_work+0x82/0xa0 [ 76.995281][ T9690] route4_change+0x19e8/0x2250 [ 77.000030][ T9690] ? route4_destroy+0x800/0x800 [ 77.004859][ T9690] ? wait_for_completion+0x3c0/0x3c0 [ 77.010123][ T9690] tc_new_tfilter+0xa59/0x20b0 [ 77.014867][ T9690] ? route4_destroy+0x800/0x800 [ 77.019700][ T9690] ? tc_del_tfilter+0x1430/0x1430 [ 77.024732][ T9690] ? __lock_acquire+0x80b/0x3ca0 [ 77.029752][ T9690] ? apparmor_capable+0x454/0x8a0 [ 77.034795][ T9690] ? rcu_read_lock_held+0x9c/0xb0 [ 77.039805][ T9690] ? tc_del_tfilter+0x1430/0x1430 [ 77.044812][ T9690] rtnetlink_rcv_msg+0x810/0xad0 [ 77.049765][ T9690] ? rtnl_bridge_getlink+0x870/0x870 [ 77.055030][ T9690] ? mark_held_locks+0xe0/0xe0 [ 77.059770][ T9690] ? netlink_deliver_tap+0x146/0xb50 [ 77.065034][ T9690] netlink_rcv_skb+0x15a/0x410 [ 77.069776][ T9690] ? rtnl_bridge_getlink+0x870/0x870 [ 77.075043][ T9690] ? netlink_ack+0xa80/0xa80 [ 77.079655][ T9690] netlink_unicast+0x537/0x740 [ 77.084406][ T9690] ? netlink_attachskb+0x810/0x810 [ 77.089535][ T9690] ? _copy_from_iter_full+0x25c/0x870 [ 77.094887][ T9690] ? __phys_addr_symbol+0x2c/0x70 [ 77.099925][ T9690] ? __check_object_size+0x171/0x437 [ 77.105195][ T9690] netlink_sendmsg+0x882/0xe10 [ 77.109937][ T9690] ? aa_af_perm+0x260/0x260 [ 77.114415][ T9690] ? netlink_unicast+0x740/0x740 [ 77.119339][ T9690] ? netlink_unicast+0x740/0x740 [ 77.124252][ T9690] sock_sendmsg+0xcf/0x120 [ 77.128653][ T9690] ____sys_sendmsg+0x6b9/0x7d0 [ 77.133419][ T9690] ? kernel_sendmsg+0x50/0x50 [ 77.138077][ T9690] ___sys_sendmsg+0x100/0x170 [ 77.142737][ T9690] ? sendmsg_copy_msghdr+0x70/0x70 [ 77.147832][ T9690] ? __fget_files+0x329/0x4f0 [ 77.152491][ T9690] ? ksys_dup3+0x3c0/0x3c0 [ 77.156885][ T9690] ? __fget_light+0x208/0x270 [ 77.161541][ T9690] __sys_sendmsg+0xec/0x1b0 [ 77.166021][ T9690] ? __sys_sendmsg_sock+0xb0/0xb0 [ 77.171023][ T9690] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.176976][ T9690] ? __x64_sys_futex+0x380/0x4f0 [ 77.181897][ T9690] ? trace_hardirqs_off_caller+0x55/0x230 [ 77.187598][ T9690] ? do_syscall_64+0x21/0x7d0 [ 77.192255][ T9690] do_syscall_64+0xf6/0x7d0 [ 77.196738][ T9690] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.202610][ T9690] RIP: 0033:0x4466c9 [ 77.206482][ T9690] 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 [ 77.226063][ T9690] RSP: 002b:00007f0e71ae2d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.234463][ T9690] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 00000000004466c9 [ 77.242420][ T9690] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 77.250381][ T9690] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 77.258330][ T9690] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 77.266277][ T9690] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 77.275291][ T9690] Kernel Offset: disabled [ 77.279695][ T9690] Rebooting in 86400 seconds..