[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.904059][ T27] audit: type=1800 audit(1584648977.279:25): pid=9332 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.931227][ T27] audit: type=1800 audit(1584648977.279:26): pid=9332 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.982167][ T27] audit: type=1800 audit(1584648977.279:27): pid=9332 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 '10.128.0.37' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.718891][ T9487] IPVS: ftp: loaded support on port[0] = 21 [ 74.758333][ T9490] ------------[ cut here ]------------ [ 74.763917][ T9490] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 74.773071][ T9490] WARNING: CPU: 1 PID: 9490 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 74.782614][ T9490] Kernel panic - not syncing: panic_on_warn set ... [ 74.789184][ T9490] CPU: 1 PID: 9490 Comm: syz-executor407 Not tainted 5.6.0-rc5-syzkaller #0 [ 74.797834][ T9490] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.807878][ T9490] Call Trace: [ 74.811172][ T9490] dump_stack+0x188/0x20d [ 74.815488][ T9490] ? debug_print_object+0x80/0x250 [ 74.820585][ T9490] panic+0x2e3/0x75c [ 74.824467][ T9490] ? add_taint.cold+0x16/0x16 [ 74.829138][ T9490] ? __probe_kernel_read+0x188/0x1d0 [ 74.834398][ T9490] ? __warn.cold+0x14/0x35 [ 74.838792][ T9490] ? __warn+0xd5/0x1c8 [ 74.842864][ T9490] ? debug_print_object+0x160/0x250 [ 74.848052][ T9490] __warn.cold+0x2f/0x35 [ 74.852285][ T9490] ? debug_print_object+0x160/0x250 [ 74.857493][ T9490] report_bug+0x27b/0x2f0 [ 74.861817][ T9490] do_error_trap+0x12b/0x220 [ 74.866424][ T9490] ? debug_print_object+0x160/0x250 [ 74.871613][ T9490] do_invalid_op+0x32/0x40 [ 74.876046][ T9490] ? debug_print_object+0x160/0x250 [ 74.881240][ T9490] invalid_op+0x23/0x30 [ 74.885395][ T9490] RIP: 0010:debug_print_object+0x160/0x250 [ 74.891206][ T9490] 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 0b df f3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 74.910799][ T9490] RSP: 0018:ffffc90002077178 EFLAGS: 00010282 [ 74.916854][ T9490] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 74.924817][ T9490] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff5200040ee21 [ 74.932800][ T9490] RBP: 0000000000000001 R08: ffff88808f2be280 R09: fffffbfff1851178 [ 74.940760][ T9490] R10: fffffbfff1851177 R11: ffffffff8c288bbf R12: ffffffff899acba0 [ 74.948720][ T9490] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200040ee3c [ 74.956711][ T9490] ? vprintk_func+0x81/0x17e [ 74.961314][ T9490] ? debug_print_object+0x160/0x250 [ 74.966537][ T9490] ? lockdep_hardirqs_on+0x417/0x5d0 [ 74.971918][ T9490] debug_object_activate+0x346/0x470 [ 74.977188][ T9490] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 74.982985][ T9490] ? debug_object_init_on_stack+0x20/0x20 [ 74.988696][ T9490] ? find_held_lock+0x2d/0x110 [ 74.993460][ T9490] ? free_object+0x70/0x70 [ 74.997862][ T9490] ? lock_downgrade+0x7f0/0x7f0 [ 75.002729][ T9490] ? delayed_work_timer_fn+0x90/0x90 [ 75.008001][ T9490] call_rcu+0x2c/0x690 [ 75.012056][ T9490] queue_rcu_work+0x82/0xa0 [ 75.016541][ T9490] route4_change+0x19e8/0x2250 [ 75.021302][ T9490] ? route4_destroy+0x800/0x800 [ 75.026180][ T9490] ? wait_for_completion+0x3c0/0x3c0 [ 75.031493][ T9490] tc_new_tfilter+0xa59/0x20b0 [ 75.036269][ T9490] ? route4_destroy+0x800/0x800 [ 75.041109][ T9490] ? tc_del_tfilter+0x1430/0x1430 [ 75.046133][ T9490] ? __lock_acquire+0x80b/0x3ca0 [ 75.051060][ T9490] ? apparmor_capable+0x454/0x8a0 [ 75.056077][ T9490] ? rcu_read_lock_held+0x9c/0xb0 [ 75.061086][ T9490] ? tc_del_tfilter+0x1430/0x1430 [ 75.066548][ T9490] rtnetlink_rcv_msg+0x810/0xad0 [ 75.071515][ T9490] ? rtnl_bridge_getlink+0x870/0x870 [ 75.076805][ T9490] ? mark_held_locks+0xe0/0xe0 [ 75.081566][ T9490] ? netlink_deliver_tap+0x146/0xb50 [ 75.086863][ T9490] netlink_rcv_skb+0x15a/0x410 [ 75.091630][ T9490] ? rtnl_bridge_getlink+0x870/0x870 [ 75.097122][ T9490] ? netlink_ack+0xa80/0xa80 [ 75.101725][ T9490] netlink_unicast+0x537/0x740 [ 75.106485][ T9490] ? netlink_attachskb+0x810/0x810 [ 75.111579][ T9490] ? _copy_from_iter_full+0x25c/0x870 [ 75.116950][ T9490] ? __phys_addr_symbol+0x2c/0x70 [ 75.121974][ T9490] ? __check_object_size+0x171/0x437 [ 75.127776][ T9490] netlink_sendmsg+0x882/0xe10 [ 75.132627][ T9490] ? aa_af_perm+0x260/0x260 [ 75.137114][ T9490] ? netlink_unicast+0x740/0x740 [ 75.142053][ T9490] ? netlink_unicast+0x740/0x740 [ 75.147162][ T9490] sock_sendmsg+0xcf/0x120 [ 75.151563][ T9490] ____sys_sendmsg+0x6b9/0x7d0 [ 75.156343][ T9490] ? kernel_sendmsg+0x50/0x50 [ 75.161053][ T9490] ___sys_sendmsg+0x100/0x170 [ 75.165735][ T9490] ? sendmsg_copy_msghdr+0x70/0x70 [ 75.170836][ T9490] ? __fget_files+0x329/0x4f0 [ 75.175519][ T9490] ? ksys_dup3+0x3c0/0x3c0 [ 75.179947][ T9490] ? __fget_light+0x208/0x270 [ 75.184606][ T9490] __sys_sendmsg+0xec/0x1b0 [ 75.189090][ T9490] ? __sys_sendmsg_sock+0xb0/0xb0 [ 75.194130][ T9490] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 75.200091][ T9490] ? __x64_sys_futex+0x380/0x4f0 [ 75.205029][ T9490] ? trace_hardirqs_off_caller+0x55/0x230 [ 75.210738][ T9490] ? do_syscall_64+0x21/0x7d0 [ 75.215416][ T9490] do_syscall_64+0xf6/0x7d0 [ 75.219934][ T9490] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.225813][ T9490] RIP: 0033:0x4478a9 [ 75.229691][ T9490] Code: e8 5c b5 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 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 75.249277][ T9490] RSP: 002b:00007f806f9ded98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 75.257672][ T9490] RAX: ffffffffffffffda RBX: 00000000006e2a18 RCX: 00000000004478a9 [ 75.265630][ T9490] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 75.273592][ T9490] RBP: 00000000006e2a10 R08: 0000000000000000 R09: 0000000000000000 [ 75.281541][ T9490] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e2a1c [ 75.289505][ T9490] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 75.298964][ T9490] Kernel Offset: disabled [ 75.303380][ T9490] Rebooting in 86400 seconds..