[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 64.846338][ T27] audit: type=1800 audit(1584276012.580:25): pid=9231 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 64.866135][ T27] audit: type=1800 audit(1584276012.580:26): pid=9231 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 64.901246][ T27] audit: type=1800 audit(1584276012.580:27): pid=9231 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 '10.128.1.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.289742][ T9384] IPVS: ftp: loaded support on port[0] = 21 [ 75.329439][ T9387] ------------[ cut here ]------------ [ 75.335026][ T9387] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 75.344070][ T9387] WARNING: CPU: 1 PID: 9387 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 75.353624][ T9387] Kernel panic - not syncing: panic_on_warn set ... [ 75.360192][ T9387] CPU: 1 PID: 9387 Comm: syz-executor554 Not tainted 5.6.0-rc5-syzkaller #0 [ 75.368850][ T9387] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.378884][ T9387] Call Trace: [ 75.382161][ T9387] dump_stack+0x188/0x20d [ 75.386486][ T9387] ? debug_print_object+0x80/0x250 [ 75.391679][ T9387] panic+0x2e3/0x75c [ 75.395566][ T9387] ? add_taint.cold+0x16/0x16 [ 75.400238][ T9387] ? __probe_kernel_read+0x188/0x1d0 [ 75.405508][ T9387] ? __warn.cold+0x14/0x35 [ 75.409907][ T9387] ? __warn+0xd5/0x1c8 [ 75.414254][ T9387] ? debug_print_object+0x160/0x250 [ 75.419440][ T9387] __warn.cold+0x2f/0x35 [ 75.423678][ T9387] ? debug_print_object+0x160/0x250 [ 75.428856][ T9387] report_bug+0x27b/0x2f0 [ 75.433174][ T9387] do_error_trap+0x12b/0x220 [ 75.437746][ T9387] ? debug_print_object+0x160/0x250 [ 75.442925][ T9387] do_invalid_op+0x32/0x40 [ 75.447322][ T9387] ? debug_print_object+0x160/0x250 [ 75.452500][ T9387] invalid_op+0x23/0x30 [ 75.456722][ T9387] RIP: 0010:debug_print_object+0x160/0x250 [ 75.462941][ T9387] Code: dd c0 fa 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 fa 51 88 48 c7 c7 20 f0 51 88 e8 a8 bd b1 fd <0f> 0b 83 05 0b ce d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 75.482608][ T9387] RSP: 0018:ffffc900020e7178 EFLAGS: 00010282 [ 75.488655][ T9387] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 75.496611][ T9387] RDX: 0000000000000000 RSI: ffffffff815bfe61 RDI: fffff5200041ce21 [ 75.504575][ T9387] RBP: 0000000000000001 R08: ffff8880977f0040 R09: fffffbfff180f778 [ 75.512531][ T9387] R10: fffffbfff180f777 R11: ffffffff8c07bbbf R12: ffffffff897acba0 [ 75.520482][ T9387] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200041ce3c [ 75.528451][ T9387] ? vprintk_func+0x81/0x17e [ 75.533073][ T9387] ? debug_print_object+0x160/0x250 [ 75.538299][ T9387] ? lockdep_hardirqs_on+0x417/0x5d0 [ 75.543566][ T9387] debug_object_activate+0x346/0x470 [ 75.548856][ T9387] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 75.557854][ T9387] ? debug_object_init_on_stack+0x20/0x20 [ 75.563554][ T9387] ? find_held_lock+0x2d/0x110 [ 75.568300][ T9387] ? free_object+0x70/0x70 [ 75.572695][ T9387] ? lock_downgrade+0x7f0/0x7f0 [ 75.577524][ T9387] ? delayed_work_timer_fn+0x90/0x90 [ 75.582788][ T9387] call_rcu+0x2c/0x690 [ 75.586840][ T9387] queue_rcu_work+0x82/0xa0 [ 75.591325][ T9387] route4_change+0x19e8/0x2250 [ 75.596090][ T9387] ? route4_destroy+0x800/0x800 [ 75.600935][ T9387] ? wait_for_completion+0x3c0/0x3c0 [ 75.606213][ T9387] tc_new_tfilter+0xa59/0x20b0 [ 75.610967][ T9387] ? route4_destroy+0x800/0x800 [ 75.615800][ T9387] ? tc_del_tfilter+0x1430/0x1430 [ 75.620814][ T9387] ? __lock_acquire+0x80b/0x3ca0 [ 75.625753][ T9387] ? apparmor_capable+0x454/0x8a0 [ 75.630762][ T9387] ? rcu_read_lock_held+0x9c/0xb0 [ 75.635782][ T9387] ? tc_del_tfilter+0x1430/0x1430 [ 75.640787][ T9387] rtnetlink_rcv_msg+0x810/0xad0 [ 75.645707][ T9387] ? rtnl_bridge_getlink+0x870/0x870 [ 75.650988][ T9387] ? mark_held_locks+0xe0/0xe0 [ 75.655730][ T9387] ? netlink_deliver_tap+0x146/0xb50 [ 75.660996][ T9387] netlink_rcv_skb+0x15a/0x410 [ 75.668351][ T9387] ? rtnl_bridge_getlink+0x870/0x870 [ 75.673621][ T9387] ? netlink_ack+0xa80/0xa80 [ 75.678202][ T9387] netlink_unicast+0x537/0x740 [ 75.682962][ T9387] ? netlink_attachskb+0x810/0x810 [ 75.688072][ T9387] ? _copy_from_iter_full+0x25c/0x870 [ 75.693447][ T9387] ? __phys_addr_symbol+0x2c/0x70 [ 75.698467][ T9387] ? __check_object_size+0x171/0x437 [ 75.703735][ T9387] netlink_sendmsg+0x882/0xe10 [ 75.708480][ T9387] ? aa_af_perm+0x260/0x260 [ 75.712963][ T9387] ? netlink_unicast+0x740/0x740 [ 75.717883][ T9387] ? netlink_unicast+0x740/0x740 [ 75.722805][ T9387] sock_sendmsg+0xcf/0x120 [ 75.727230][ T9387] ____sys_sendmsg+0x6b9/0x7d0 [ 75.731973][ T9387] ? kernel_sendmsg+0x50/0x50 [ 75.736638][ T9387] ___sys_sendmsg+0x100/0x170 [ 75.741300][ T9387] ? sendmsg_copy_msghdr+0x70/0x70 [ 75.746400][ T9387] ? __fget_files+0x329/0x4f0 [ 75.751062][ T9387] ? ksys_dup3+0x3c0/0x3c0 [ 75.755463][ T9387] ? __fget_light+0x208/0x270 [ 75.760123][ T9387] __sys_sendmsg+0xec/0x1b0 [ 75.764610][ T9387] ? __sys_sendmsg_sock+0xb0/0xb0 [ 75.769614][ T9387] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 75.775572][ T9387] ? __x64_sys_futex+0x380/0x4f0 [ 75.780494][ T9387] ? trace_hardirqs_off_caller+0x55/0x230 [ 75.786193][ T9387] ? do_syscall_64+0x21/0x7d0 [ 75.791283][ T9387] do_syscall_64+0xf6/0x7d0 [ 75.795790][ T9387] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.801681][ T9387] RIP: 0033:0x4478a9 [ 75.805573][ T9387] 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 [ 75.825160][ T9387] RSP: 002b:00007fd6be5ead98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 75.833580][ T9387] RAX: ffffffffffffffda RBX: 00000000006e2a18 RCX: 00000000004478a9 [ 75.841592][ T9387] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 75.849572][ T9387] RBP: 00000000006e2a10 R08: 0000000000000000 R09: 0000000000000000 [ 75.857546][ T9387] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e2a1c [ 75.865506][ T9387] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 75.874844][ T9387] Kernel Offset: disabled [ 75.879233][ T9387] Rebooting in 86400 seconds..