[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.009308][ T27] audit: type=1800 audit(1584346374.418:25): pid=9352 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.044349][ T27] audit: type=1800 audit(1584346374.418:26): pid=9352 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.078286][ T27] audit: type=1800 audit(1584346374.428:27): pid=9352 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 '10.128.0.133' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.550433][ T9505] IPVS: ftp: loaded support on port[0] = 21 [ 82.591268][ T9507] ------------[ cut here ]------------ [ 82.597018][ T9507] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 82.606181][ T9507] WARNING: CPU: 1 PID: 9507 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 82.615694][ T9507] Kernel panic - not syncing: panic_on_warn set ... [ 82.622272][ T9507] CPU: 1 PID: 9507 Comm: syz-executor495 Not tainted 5.6.0-rc5-syzkaller #0 [ 82.630953][ T9507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.641003][ T9507] Call Trace: [ 82.644282][ T9507] dump_stack+0x188/0x20d [ 82.648596][ T9507] ? debug_print_object+0x120/0x250 [ 82.653806][ T9507] panic+0x2e3/0x75c [ 82.657691][ T9507] ? add_taint.cold+0x16/0x16 [ 82.662362][ T9507] ? __probe_kernel_read+0x188/0x1d0 [ 82.667626][ T9507] ? __warn.cold+0x14/0x35 [ 82.672021][ T9507] ? __warn+0xd5/0x1c8 [ 82.676076][ T9507] ? debug_print_object+0x160/0x250 [ 82.681260][ T9507] __warn.cold+0x2f/0x35 [ 82.685495][ T9507] ? debug_print_object+0x160/0x250 [ 82.690688][ T9507] report_bug+0x27b/0x2f0 [ 82.695012][ T9507] do_error_trap+0x12b/0x220 [ 82.699579][ T9507] ? debug_print_object+0x160/0x250 [ 82.704788][ T9507] do_invalid_op+0x32/0x40 [ 82.709188][ T9507] ? debug_print_object+0x160/0x250 [ 82.714377][ T9507] invalid_op+0x23/0x30 [ 82.718515][ T9507] RIP: 0010:debug_print_object+0x160/0x250 [ 82.724300][ T9507] Code: dd c0 f3 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 f3 51 88 48 c7 c7 20 e9 51 88 e8 d8 cc b1 fd <0f> 0b 83 05 ab 9a d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 82.743884][ T9507] RSP: 0018:ffffc90002057168 EFLAGS: 00010286 [ 82.749933][ T9507] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 82.757886][ T9507] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff5200040ae1f [ 82.765886][ T9507] RBP: 0000000000000001 R08: ffff8880956dc640 R09: fffffbfff180e578 [ 82.773839][ T9507] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 82.781790][ T9507] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200040ae3a [ 82.789788][ T9507] ? vprintk_func+0x81/0x17e [ 82.794366][ T9507] ? debug_print_object+0x160/0x250 [ 82.799545][ T9507] ? lockdep_hardirqs_on+0x417/0x5d0 [ 82.804813][ T9507] debug_object_activate+0x346/0x470 [ 82.810078][ T9507] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 82.815863][ T9507] ? debug_object_init_on_stack+0x20/0x20 [ 82.821574][ T9507] ? find_held_lock+0x2d/0x110 [ 82.826320][ T9507] ? free_object+0x70/0x70 [ 82.830712][ T9507] ? lock_downgrade+0x7f0/0x7f0 [ 82.835542][ T9507] ? delayed_work_timer_fn+0x90/0x90 [ 82.840806][ T9507] call_rcu+0x2c/0x690 [ 82.844871][ T9507] queue_rcu_work+0x82/0xa0 [ 82.849370][ T9507] route4_change+0x19e8/0x2250 [ 82.854132][ T9507] ? route4_destroy+0x800/0x800 [ 82.858988][ T9507] ? wait_for_completion+0x3c0/0x3c0 [ 82.864283][ T9507] tc_new_tfilter+0xa59/0x20b0 [ 82.869093][ T9507] ? route4_destroy+0x800/0x800 [ 82.874024][ T9507] ? tc_del_tfilter+0x1430/0x1430 [ 82.879041][ T9507] ? __lock_acquire+0x80b/0x3ca0 [ 82.883967][ T9507] ? apparmor_capable+0x454/0x8a0 [ 82.888993][ T9507] ? rcu_read_lock_held+0x9c/0xb0 [ 82.894061][ T9507] ? tc_del_tfilter+0x1430/0x1430 [ 82.899068][ T9507] rtnetlink_rcv_msg+0x810/0xad0 [ 82.903990][ T9507] ? rtnl_bridge_getlink+0x880/0x880 [ 82.909267][ T9507] ? mark_held_locks+0xe0/0xe0 [ 82.914025][ T9507] ? netlink_deliver_tap+0x146/0xb50 [ 82.919298][ T9507] netlink_rcv_skb+0x15a/0x410 [ 82.924064][ T9507] ? rtnl_bridge_getlink+0x880/0x880 [ 82.929337][ T9507] ? netlink_ack+0xa80/0xa80 [ 82.933922][ T9507] netlink_unicast+0x537/0x740 [ 82.938715][ T9507] ? netlink_attachskb+0x810/0x810 [ 82.943805][ T9507] ? _copy_from_iter_full+0x25c/0x870 [ 82.949159][ T9507] ? __phys_addr_symbol+0x2c/0x70 [ 82.954163][ T9507] ? __check_object_size+0x171/0x437 [ 82.959431][ T9507] netlink_sendmsg+0x882/0xe10 [ 82.964177][ T9507] ? aa_af_perm+0x260/0x260 [ 82.968657][ T9507] ? netlink_unicast+0x740/0x740 [ 82.973578][ T9507] ? netlink_unicast+0x740/0x740 [ 82.978501][ T9507] sock_sendmsg+0xcf/0x120 [ 82.982897][ T9507] ____sys_sendmsg+0x6b9/0x7d0 [ 82.987642][ T9507] ? kernel_sendmsg+0x50/0x50 [ 82.992305][ T9507] ___sys_sendmsg+0x100/0x170 [ 82.996963][ T9507] ? sendmsg_copy_msghdr+0x70/0x70 [ 83.002057][ T9507] ? __fget_files+0x329/0x4f0 [ 83.006717][ T9507] ? ksys_dup3+0x3c0/0x3c0 [ 83.011117][ T9507] ? __fget_light+0x208/0x270 [ 83.015779][ T9507] __sys_sendmsg+0xec/0x1b0 [ 83.020261][ T9507] ? __sys_sendmsg_sock+0xb0/0xb0 [ 83.025270][ T9507] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 83.031234][ T9507] ? __ia32_sys_futex_time32+0x32a/0x494 [ 83.036851][ T9507] ? fpregs_mark_activate+0x320/0x320 [ 83.042216][ T9507] ? trace_hardirqs_off_caller+0x55/0x230 [ 83.047922][ T9507] ? do_fast_syscall_32+0xcc/0xe8f [ 83.053034][ T9507] do_fast_syscall_32+0x270/0xe8f [ 83.058055][ T9507] entry_SYSENTER_compat+0x70/0x7f [ 83.064654][ T9507] Kernel Offset: disabled [ 83.069059][ T9507] Rebooting in 86400 seconds..