[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 64.954620][ T27] audit: type=1800 audit(1584974980.821:25): pid=9466 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 64.975280][ T27] audit: type=1800 audit(1584974980.831:26): pid=9466 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.016401][ T27] audit: type=1800 audit(1584974980.831:27): pid=9466 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 '10.128.0.68' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.581317][ T9618] IPVS: ftp: loaded support on port[0] = 21 [ 76.624100][ T9619] ------------[ cut here ]------------ [ 76.629886][ T9619] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 76.638972][ T9619] WARNING: CPU: 0 PID: 9619 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 76.648431][ T9619] Kernel panic - not syncing: panic_on_warn set ... [ 76.655005][ T9619] CPU: 0 PID: 9619 Comm: syz-executor136 Not tainted 5.6.0-rc6-syzkaller #0 [ 76.663662][ T9619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.673707][ T9619] Call Trace: [ 76.676998][ T9619] dump_stack+0x188/0x20d [ 76.681328][ T9619] ? debug_print_object+0xc0/0x250 [ 76.686432][ T9619] panic+0x2e3/0x75c [ 76.690315][ T9619] ? add_taint.cold+0x16/0x16 [ 76.694987][ T9619] ? __probe_kernel_read+0x188/0x1d0 [ 76.701038][ T9619] ? __warn.cold+0x14/0x35 [ 76.705448][ T9619] ? __warn+0xd5/0x1c8 [ 76.709529][ T9619] ? debug_print_object+0x160/0x250 [ 76.714760][ T9619] __warn.cold+0x2f/0x35 [ 76.719125][ T9619] ? debug_print_object+0x160/0x250 [ 76.724338][ T9619] report_bug+0x27b/0x2f0 [ 76.729122][ T9619] do_error_trap+0x12b/0x220 [ 76.733700][ T9619] ? debug_print_object+0x160/0x250 [ 76.738897][ T9619] do_invalid_op+0x32/0x40 [ 76.743337][ T9619] ? debug_print_object+0x160/0x250 [ 76.748518][ T9619] invalid_op+0x23/0x30 [ 76.753535][ T9619] RIP: 0010:debug_print_object+0x160/0x250 [ 76.759323][ T9619] Code: dd 00 f2 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 00 f2 51 88 48 c7 c7 60 e7 51 88 e8 78 29 b1 fd <0f> 0b 83 05 cb f6 d2 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 76.779609][ T9619] RSP: 0018:ffffc90002097178 EFLAGS: 00010282 [ 76.785693][ T9619] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 76.793680][ T9619] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff52000412e21 [ 76.801638][ T9619] RBP: 0000000000000001 R08: ffff88808f696040 R09: fffffbfff180e578 [ 76.809594][ T9619] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 76.817643][ T9619] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000412e3c [ 76.825620][ T9619] ? vprintk_func+0x81/0x17e [ 76.830203][ T9619] ? debug_print_object+0x160/0x250 [ 76.835404][ T9619] ? lockdep_hardirqs_on+0x417/0x5d0 [ 76.840728][ T9619] debug_object_activate+0x346/0x470 [ 76.846008][ T9619] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 76.851802][ T9619] ? debug_object_init_on_stack+0x20/0x20 [ 76.857503][ T9619] ? find_held_lock+0x2d/0x110 [ 76.862269][ T9619] ? free_object+0x70/0x70 [ 76.866677][ T9619] ? lock_downgrade+0x7f0/0x7f0 [ 76.871520][ T9619] ? delayed_work_timer_fn+0x90/0x90 [ 76.876802][ T9619] call_rcu+0x2c/0x690 [ 76.880880][ T9619] queue_rcu_work+0x82/0xa0 [ 76.885377][ T9619] route4_change+0x19e8/0x2250 [ 76.890152][ T9619] ? route4_destroy+0x800/0x800 [ 76.894993][ T9619] ? wait_for_completion+0x3c0/0x3c0 [ 76.900318][ T9619] tc_new_tfilter+0xa59/0x20b0 [ 76.905081][ T9619] ? route4_destroy+0x800/0x800 [ 76.909969][ T9619] ? tc_del_tfilter+0x1430/0x1430 [ 76.914984][ T9619] ? __lock_acquire+0x80b/0x3ca0 [ 76.919924][ T9619] ? apparmor_capable+0x454/0x8a0 [ 76.924941][ T9619] ? rcu_read_lock_held+0x9c/0xb0 [ 76.929959][ T9619] ? tc_del_tfilter+0x1430/0x1430 [ 76.934991][ T9619] rtnetlink_rcv_msg+0x810/0xad0 [ 76.939914][ T9619] ? rtnl_bridge_getlink+0x880/0x880 [ 76.945224][ T9619] ? mark_held_locks+0xe0/0xe0 [ 76.949970][ T9619] ? netlink_deliver_tap+0x146/0xb50 [ 76.955243][ T9619] netlink_rcv_skb+0x15a/0x410 [ 76.959993][ T9619] ? rtnl_bridge_getlink+0x880/0x880 [ 76.965265][ T9619] ? netlink_ack+0xa80/0xa80 [ 76.969849][ T9619] netlink_unicast+0x537/0x740 [ 76.974641][ T9619] ? netlink_attachskb+0x810/0x810 [ 76.979739][ T9619] ? _copy_from_iter_full+0x25c/0x870 [ 76.985095][ T9619] ? __phys_addr_symbol+0x2c/0x70 [ 76.990133][ T9619] ? __check_object_size+0x171/0x437 [ 76.995449][ T9619] netlink_sendmsg+0x882/0xe10 [ 77.000201][ T9619] ? aa_af_perm+0x260/0x260 [ 77.004687][ T9619] ? netlink_unicast+0x740/0x740 [ 77.009617][ T9619] ? netlink_unicast+0x740/0x740 [ 77.014608][ T9619] sock_sendmsg+0xcf/0x120 [ 77.019025][ T9619] ____sys_sendmsg+0x6b9/0x7d0 [ 77.023794][ T9619] ? kernel_sendmsg+0x50/0x50 [ 77.028472][ T9619] ___sys_sendmsg+0x100/0x170 [ 77.033138][ T9619] ? sendmsg_copy_msghdr+0x70/0x70 [ 77.038243][ T9619] ? __fget_files+0x329/0x4f0 [ 77.042947][ T9619] ? ksys_dup3+0x3c0/0x3c0 [ 77.047353][ T9619] ? __fget_light+0x208/0x270 [ 77.052108][ T9619] __sys_sendmsg+0xec/0x1b0 [ 77.057593][ T9619] ? __sys_sendmsg_sock+0xb0/0xb0 [ 77.062599][ T9619] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.068560][ T9619] ? __x64_sys_futex+0x380/0x4f0 [ 77.073489][ T9619] ? trace_hardirqs_off_caller+0x55/0x230 [ 77.080020][ T9619] ? do_syscall_64+0x21/0x7d0 [ 77.084686][ T9619] do_syscall_64+0xf6/0x7d0 [ 77.089178][ T9619] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.095101][ T9619] RIP: 0033:0x446f59 [ 77.098982][ T9619] Code: e8 4c 14 03 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 9b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.118610][ T9619] RSP: 002b:00007fe03f377d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.127044][ T9619] RAX: ffffffffffffffda RBX: 00000000006dcc68 RCX: 0000000000446f59 [ 77.135011][ T9619] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 77.143005][ T9619] RBP: 00000000006dcc60 R08: 0000000000000000 R09: 0000000000000000 [ 77.150996][ T9619] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc6c [ 77.159653][ T9619] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 77.168978][ T9619] Kernel Offset: disabled [ 77.173419][ T9619] Rebooting in 86400 seconds..