[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 70.937526][ T27] audit: type=1800 audit(1584684269.098:25): pid=9597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 70.957423][ T27] audit: type=1800 audit(1584684269.098:26): pid=9597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 70.999365][ T27] audit: type=1800 audit(1584684269.098:27): pid=9597 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 '10.128.1.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 89.160291][ T9750] IPVS: ftp: loaded support on port[0] = 21 [ 89.203727][ T9753] ------------[ cut here ]------------ [ 89.209722][ T9753] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 89.218849][ T9753] WARNING: CPU: 0 PID: 9753 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 89.228308][ T9753] Kernel panic - not syncing: panic_on_warn set ... [ 89.234889][ T9753] CPU: 0 PID: 9753 Comm: syz-executor048 Not tainted 5.6.0-rc6-syzkaller #0 [ 89.243564][ T9753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.253603][ T9753] Call Trace: [ 89.256883][ T9753] dump_stack+0x188/0x20d [ 89.261217][ T9753] ? debug_print_object+0x120/0x250 [ 89.266426][ T9753] panic+0x2e3/0x75c [ 89.270409][ T9753] ? add_taint.cold+0x16/0x16 [ 89.275096][ T9753] ? __probe_kernel_read+0x188/0x1d0 [ 89.280466][ T9753] ? __warn.cold+0x14/0x35 [ 89.284866][ T9753] ? __warn+0xd5/0x1c8 [ 89.288920][ T9753] ? debug_print_object+0x160/0x250 [ 89.294102][ T9753] __warn.cold+0x2f/0x35 [ 89.298348][ T9753] ? debug_print_object+0x160/0x250 [ 89.303531][ T9753] report_bug+0x27b/0x2f0 [ 89.307863][ T9753] do_error_trap+0x12b/0x220 [ 89.312437][ T9753] ? debug_print_object+0x160/0x250 [ 89.317622][ T9753] do_invalid_op+0x32/0x40 [ 89.322026][ T9753] ? debug_print_object+0x160/0x250 [ 89.327209][ T9753] invalid_op+0x23/0x30 [ 89.331350][ T9753] RIP: 0010:debug_print_object+0x160/0x250 [ 89.337137][ T9753] 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 ca b1 fd <0f> 0b 83 05 ab 98 d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 89.356739][ T9753] RSP: 0018:ffffc90002157178 EFLAGS: 00010282 [ 89.362898][ T9753] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 89.370865][ T9753] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff5200042ae21 [ 89.378840][ T9753] RBP: 0000000000000001 R08: ffff8880a40f23c0 R09: ffffed1015cc45c9 [ 89.386814][ T9753] R10: ffffed1015cc45c8 R11: ffff8880ae622e43 R12: ffffffff897acba0 [ 89.394793][ T9753] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200042ae3c [ 89.402787][ T9753] ? vprintk_func+0x81/0x17e [ 89.407395][ T9753] ? debug_print_object+0x160/0x250 [ 89.412603][ T9753] ? lockdep_hardirqs_on+0x417/0x5d0 [ 89.417903][ T9753] debug_object_activate+0x346/0x470 [ 89.423216][ T9753] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 89.429045][ T9753] ? debug_object_init_on_stack+0x20/0x20 [ 89.434770][ T9753] ? find_held_lock+0x2d/0x110 [ 89.439551][ T9753] ? free_object+0x70/0x70 [ 89.443967][ T9753] ? lock_downgrade+0x7f0/0x7f0 [ 89.448830][ T9753] ? delayed_work_timer_fn+0x90/0x90 [ 89.454124][ T9753] call_rcu+0x2c/0x690 [ 89.458214][ T9753] queue_rcu_work+0x82/0xa0 [ 89.462727][ T9753] route4_change+0x19e8/0x2250 [ 89.467512][ T9753] ? route4_destroy+0x800/0x800 [ 89.472406][ T9753] ? wait_for_completion+0x3c0/0x3c0 [ 89.477698][ T9753] tc_new_tfilter+0xa59/0x20b0 [ 89.482469][ T9753] ? route4_destroy+0x800/0x800 [ 89.487345][ T9753] ? tc_del_tfilter+0x1430/0x1430 [ 89.492380][ T9753] ? __lock_acquire+0x80b/0x3ca0 [ 89.497333][ T9753] ? apparmor_capable+0x454/0x8a0 [ 89.502387][ T9753] ? rcu_read_lock_held+0x9c/0xb0 [ 89.507440][ T9753] ? tc_del_tfilter+0x1430/0x1430 [ 89.512474][ T9753] rtnetlink_rcv_msg+0x810/0xad0 [ 89.517547][ T9753] ? rtnl_bridge_getlink+0x880/0x880 [ 89.522971][ T9753] ? mark_held_locks+0xe0/0xe0 [ 89.527743][ T9753] ? netlink_deliver_tap+0x146/0xb50 [ 89.533100][ T9753] netlink_rcv_skb+0x15a/0x410 [ 89.537961][ T9753] ? rtnl_bridge_getlink+0x880/0x880 [ 89.543269][ T9753] ? netlink_ack+0xa80/0xa80 [ 89.548003][ T9753] netlink_unicast+0x537/0x740 [ 89.552758][ T9753] ? netlink_attachskb+0x810/0x810 [ 89.558096][ T9753] ? _copy_from_iter_full+0x25c/0x870 [ 89.563466][ T9753] ? __phys_addr_symbol+0x2c/0x70 [ 89.568624][ T9753] ? __check_object_size+0x171/0x437 [ 89.573902][ T9753] netlink_sendmsg+0x882/0xe10 [ 89.578721][ T9753] ? aa_af_perm+0x260/0x260 [ 89.583211][ T9753] ? netlink_unicast+0x740/0x740 [ 89.588138][ T9753] ? netlink_unicast+0x740/0x740 [ 89.593073][ T9753] sock_sendmsg+0xcf/0x120 [ 89.597584][ T9753] ____sys_sendmsg+0x6b9/0x7d0 [ 89.602357][ T9753] ? kernel_sendmsg+0x50/0x50 [ 89.607036][ T9753] ___sys_sendmsg+0x100/0x170 [ 89.611707][ T9753] ? sendmsg_copy_msghdr+0x70/0x70 [ 89.616870][ T9753] ? __fget_files+0x329/0x4f0 [ 89.621538][ T9753] ? ksys_dup3+0x3c0/0x3c0 [ 89.625944][ T9753] ? __fget_light+0x208/0x270 [ 89.630608][ T9753] __sys_sendmsg+0xec/0x1b0 [ 89.635095][ T9753] ? __sys_sendmsg_sock+0xb0/0xb0 [ 89.640101][ T9753] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 89.646060][ T9753] ? __x64_sys_futex+0x380/0x4f0 [ 89.651106][ T9753] ? trace_hardirqs_off_caller+0x55/0x230 [ 89.656816][ T9753] ? do_syscall_64+0x21/0x7d0 [ 89.661482][ T9753] do_syscall_64+0xf6/0x7d0 [ 89.665973][ T9753] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.671981][ T9753] RIP: 0033:0x447d69 [ 89.675865][ T9753] Code: e8 cc bb 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 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 89.695675][ T9753] RSP: 002b:00007f5487af4d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 89.704074][ T9753] RAX: ffffffffffffffda RBX: 00000000006e3a18 RCX: 0000000000447d69 [ 89.712050][ T9753] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 89.720006][ T9753] RBP: 00000000006e3a10 R08: 0000000000000000 R09: 0000000000000000 [ 89.727980][ T9753] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e3a1c [ 89.735964][ T9753] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 89.744855][ T9753] Kernel Offset: disabled [ 89.749279][ T9753] Rebooting in 86400 seconds..