[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 74.649359][ T27] audit: type=1800 audit(1584719912.525:25): pid=9367 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.684267][ T27] audit: type=1800 audit(1584719912.525:26): pid=9367 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.707365][ T27] audit: type=1800 audit(1584719912.535:27): pid=9367 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 '10.128.0.82' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 87.221538][ T9520] IPVS: ftp: loaded support on port[0] = 21 [ 87.257492][ T9522] ------------[ cut here ]------------ [ 87.263050][ T9522] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 87.272133][ T9522] WARNING: CPU: 1 PID: 9522 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 87.281668][ T9522] Kernel panic - not syncing: panic_on_warn set ... [ 87.288278][ T9522] CPU: 1 PID: 9522 Comm: syz-executor812 Not tainted 5.6.0-rc5-syzkaller #0 [ 87.296978][ T9522] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.307015][ T9522] Call Trace: [ 87.310294][ T9522] dump_stack+0x188/0x20d [ 87.314610][ T9522] ? debug_print_object+0x80/0x250 [ 87.319705][ T9522] panic+0x2e3/0x75c [ 87.323608][ T9522] ? add_taint.cold+0x16/0x16 [ 87.328298][ T9522] ? __probe_kernel_read+0x188/0x1d0 [ 87.333596][ T9522] ? __warn.cold+0x14/0x35 [ 87.338189][ T9522] ? __warn+0xd5/0x1c8 [ 87.342442][ T9522] ? debug_print_object+0x160/0x250 [ 87.347628][ T9522] __warn.cold+0x2f/0x35 [ 87.351861][ T9522] ? debug_print_object+0x160/0x250 [ 87.357095][ T9522] report_bug+0x27b/0x2f0 [ 87.361607][ T9522] do_error_trap+0x12b/0x220 [ 87.366190][ T9522] ? debug_print_object+0x160/0x250 [ 87.371381][ T9522] do_invalid_op+0x32/0x40 [ 87.375781][ T9522] ? debug_print_object+0x160/0x250 [ 87.380961][ T9522] invalid_op+0x23/0x30 [ 87.385218][ T9522] RIP: 0010:debug_print_object+0x160/0x250 [ 87.391013][ T9522] 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 df f3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 87.410604][ T9522] RSP: 0018:ffffc90001ea7178 EFLAGS: 00010282 [ 87.416653][ T9522] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 87.424605][ T9522] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff520003d4e21 [ 87.432557][ T9522] RBP: 0000000000000001 R08: ffff88808bd68180 R09: ffffed1015ce6659 [ 87.440560][ T9522] R10: ffffed1015ce6658 R11: ffff8880ae7332c7 R12: ffffffff899acba0 [ 87.448517][ T9522] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920003d4e3c [ 87.456487][ T9522] ? vprintk_func+0x81/0x17e [ 87.461107][ T9522] ? debug_print_object+0x160/0x250 [ 87.466290][ T9522] ? lockdep_hardirqs_on+0x417/0x5d0 [ 87.471558][ T9522] debug_object_activate+0x346/0x470 [ 87.476827][ T9522] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 87.482616][ T9522] ? debug_object_init_on_stack+0x20/0x20 [ 87.488404][ T9522] ? find_held_lock+0x2d/0x110 [ 87.493175][ T9522] ? free_object+0x70/0x70 [ 87.497580][ T9522] ? lock_downgrade+0x7f0/0x7f0 [ 87.502414][ T9522] ? delayed_work_timer_fn+0x90/0x90 [ 87.507710][ T9522] call_rcu+0x2c/0x690 [ 87.511762][ T9522] queue_rcu_work+0x82/0xa0 [ 87.516245][ T9522] route4_change+0x19e8/0x2250 [ 87.520995][ T9522] ? route4_destroy+0x800/0x800 [ 87.525848][ T9522] ? wait_for_completion+0x3c0/0x3c0 [ 87.531122][ T9522] tc_new_tfilter+0xa59/0x20b0 [ 87.535868][ T9522] ? route4_destroy+0x800/0x800 [ 87.540714][ T9522] ? tc_del_tfilter+0x1430/0x1430 [ 87.545740][ T9522] ? __lock_acquire+0x80b/0x3ca0 [ 87.550668][ T9522] ? apparmor_capable+0x454/0x8a0 [ 87.555729][ T9522] ? rcu_read_lock_held+0x9c/0xb0 [ 87.560738][ T9522] ? tc_del_tfilter+0x1430/0x1430 [ 87.565743][ T9522] rtnetlink_rcv_msg+0x810/0xad0 [ 87.570664][ T9522] ? rtnl_bridge_getlink+0x870/0x870 [ 87.575933][ T9522] ? mark_held_locks+0xe0/0xe0 [ 87.580677][ T9522] ? netlink_deliver_tap+0x146/0xb50 [ 87.585943][ T9522] netlink_rcv_skb+0x15a/0x410 [ 87.590697][ T9522] ? rtnl_bridge_getlink+0x870/0x870 [ 87.595964][ T9522] ? netlink_ack+0xa80/0xa80 [ 87.600557][ T9522] netlink_unicast+0x537/0x740 [ 87.605305][ T9522] ? netlink_attachskb+0x810/0x810 [ 87.610402][ T9522] ? _copy_from_iter_full+0x25c/0x870 [ 87.615762][ T9522] ? __phys_addr_symbol+0x2c/0x70 [ 87.620790][ T9522] ? __check_object_size+0x171/0x437 [ 87.626058][ T9522] netlink_sendmsg+0x882/0xe10 [ 87.630804][ T9522] ? aa_af_perm+0x260/0x260 [ 87.635291][ T9522] ? netlink_unicast+0x740/0x740 [ 87.640263][ T9522] ? netlink_unicast+0x740/0x740 [ 87.645186][ T9522] sock_sendmsg+0xcf/0x120 [ 87.649585][ T9522] ____sys_sendmsg+0x6b9/0x7d0 [ 87.654338][ T9522] ? kernel_sendmsg+0x50/0x50 [ 87.659000][ T9522] ___sys_sendmsg+0x100/0x170 [ 87.663658][ T9522] ? sendmsg_copy_msghdr+0x70/0x70 [ 87.668767][ T9522] ? __fget_files+0x329/0x4f0 [ 87.673438][ T9522] ? ksys_dup3+0x3c0/0x3c0 [ 87.677853][ T9522] ? __fget_light+0x208/0x270 [ 87.682514][ T9522] __sys_sendmsg+0xec/0x1b0 [ 87.687017][ T9522] ? __sys_sendmsg_sock+0xb0/0xb0 [ 87.692024][ T9522] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 87.697983][ T9522] ? __x64_sys_futex+0x380/0x4f0 [ 87.702903][ T9522] ? trace_hardirqs_off_caller+0x55/0x230 [ 87.708618][ T9522] ? do_syscall_64+0x21/0x7d0 [ 87.713280][ T9522] do_syscall_64+0xf6/0x7d0 [ 87.717875][ T9522] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 87.723755][ T9522] RIP: 0033:0x446e89 [ 87.727647][ T9522] Code: e8 bc b4 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 [ 87.747235][ T9522] RSP: 002b:00007f0d71424d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 87.755642][ T9522] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446e89 [ 87.763607][ T9522] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 87.771615][ T9522] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 87.779884][ T9522] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 87.787835][ T9522] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 87.797349][ T9522] Kernel Offset: disabled [ 87.801745][ T9522] Rebooting in 86400 seconds..