[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.705053][ T27] audit: type=1800 audit(1583391242.772:25): pid=9740 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.725448][ T27] audit: type=1800 audit(1583391242.772:26): pid=9740 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.763952][ T27] audit: type=1800 audit(1583391242.772:27): pid=9740 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 '10.128.0.72' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.165296][ T9893] IPVS: ftp: loaded support on port[0] = 21 [ 77.196801][ T9894] ------------[ cut here ]------------ [ 77.202446][ T9894] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 77.211634][ T9894] WARNING: CPU: 0 PID: 9894 at lib/debugobjects.c:485 debug_print_object+0x168/0x250 [ 77.221075][ T9894] Kernel panic - not syncing: panic_on_warn set ... [ 77.227663][ T9894] CPU: 0 PID: 9894 Comm: syz-executor323 Not tainted 5.6.0-rc2-syzkaller #0 [ 77.236323][ T9894] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.246358][ T9894] Call Trace: [ 77.249643][ T9894] dump_stack+0x197/0x210 [ 77.253957][ T9894] ? debug_print_object+0x160/0x250 [ 77.259151][ T9894] panic+0x2e3/0x75c [ 77.263044][ T9894] ? add_taint.cold+0x16/0x16 [ 77.267758][ T9894] ? __kasan_check_write+0x14/0x20 [ 77.272872][ T9894] ? __warn.cold+0x14/0x3e [ 77.277271][ T9894] ? __warn+0xd9/0x1cf [ 77.281332][ T9894] ? debug_print_object+0x168/0x250 [ 77.286515][ T9894] __warn.cold+0x2f/0x3e [ 77.290739][ T9894] ? debug_print_object+0x168/0x250 [ 77.295969][ T9894] report_bug+0x289/0x300 [ 77.300297][ T9894] do_error_trap+0x11b/0x200 [ 77.304917][ T9894] do_invalid_op+0x37/0x50 [ 77.309324][ T9894] ? debug_print_object+0x168/0x250 [ 77.314526][ T9894] invalid_op+0x23/0x30 [ 77.318662][ T9894] RIP: 0010:debug_print_object+0x168/0x250 [ 77.324446][ T9894] Code: dd c0 e2 91 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd c0 e2 91 88 48 c7 c7 20 d8 91 88 e8 e7 a9 9f fd <0f> 0b 83 05 e3 c4 ff 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 77.344055][ T9894] RSP: 0018:ffffc900022270b0 EFLAGS: 00010286 [ 77.350108][ T9894] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 77.358065][ T9894] RDX: 0000000000000000 RSI: ffffffff815eae46 RDI: fffff52000444e08 [ 77.366033][ T9894] RBP: ffffc900022270f0 R08: ffff88808c180440 R09: ffffed1015d06659 [ 77.373986][ T9894] R10: ffffed1015d06658 R11: ffff8880ae8332c7 R12: 0000000000000001 [ 77.381937][ T9894] R13: ffffffff89bac120 R14: 0000000000000000 R15: 1ffff92000444e24 [ 77.389915][ T9894] ? vprintk_func+0x86/0x189 [ 77.394501][ T9894] debug_object_activate+0x346/0x470 [ 77.399783][ T9894] ? _raw_spin_unlock_irqrestore+0x9f/0xe0 [ 77.405575][ T9894] ? debug_object_init_on_stack+0x20/0x20 [ 77.411277][ T9894] ? mark_lock+0xc2/0x1220 [ 77.415680][ T9894] ? find_held_lock+0x35/0x130 [ 77.420435][ T9894] ? delayed_work_timer_fn+0x90/0x90 [ 77.425700][ T9894] call_rcu+0x2f/0x700 [ 77.429766][ T9894] ? trace_hardirqs_on+0x67/0x240 [ 77.434771][ T9894] queue_rcu_work+0x8a/0xa0 [ 77.439254][ T9894] ? __route4_delete_filter+0xe0/0xe0 [ 77.444602][ T9894] tcf_queue_work+0xd3/0x110 [ 77.449173][ T9894] route4_change+0x19e8/0x2250 [ 77.453920][ T9894] ? route4_destroy+0x850/0x850 [ 77.458753][ T9894] ? __kasan_check_write+0x14/0x20 [ 77.463849][ T9894] ? wait_for_completion+0x440/0x440 [ 77.469116][ T9894] ? route4_destroy+0x850/0x850 [ 77.473961][ T9894] tc_new_tfilter+0xb82/0x2480 [ 77.478718][ T9894] ? tc_del_tfilter+0x1560/0x1560 [ 77.483722][ T9894] ? __kasan_check_read+0x11/0x20 [ 77.488724][ T9894] ? __lock_acquire+0x8a0/0x4a00 [ 77.493639][ T9894] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.499865][ T9894] ? rtnetlink_rcv_msg+0x7e3/0xaf0 [ 77.504966][ T9894] ? find_held_lock+0x35/0x130 [ 77.509718][ T9894] ? rcu_read_lock_held_common+0x130/0x130 [ 77.515507][ T9894] ? tc_del_tfilter+0x1560/0x1560 [ 77.520508][ T9894] ? __kasan_check_read+0x11/0x20 [ 77.525510][ T9894] ? tc_del_tfilter+0x1560/0x1560 [ 77.530511][ T9894] rtnetlink_rcv_msg+0x824/0xaf0 [ 77.535428][ T9894] ? rtnl_bridge_getlink+0x910/0x910 [ 77.540704][ T9894] ? lock_downgrade+0x920/0x920 [ 77.545534][ T9894] ? netlink_deliver_tap+0x226/0xbf0 [ 77.550798][ T9894] ? find_held_lock+0x35/0x130 [ 77.555545][ T9894] netlink_rcv_skb+0x177/0x450 [ 77.560292][ T9894] ? rtnl_bridge_getlink+0x910/0x910 [ 77.565571][ T9894] ? netlink_ack+0xb50/0xb50 [ 77.570143][ T9894] ? __kasan_check_read+0x11/0x20 [ 77.575163][ T9894] ? netlink_deliver_tap+0x248/0xbf0 [ 77.580436][ T9894] rtnetlink_rcv+0x1d/0x30 [ 77.584831][ T9894] netlink_unicast+0x59e/0x7e0 [ 77.589582][ T9894] ? netlink_attachskb+0x870/0x870 [ 77.594676][ T9894] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 77.600461][ T9894] ? __check_object_size+0x3d/0x437 [ 77.605642][ T9894] netlink_sendmsg+0x91c/0xea0 [ 77.610396][ T9894] ? netlink_unicast+0x7e0/0x7e0 [ 77.615315][ T9894] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 77.620845][ T9894] ? apparmor_socket_sendmsg+0x2a/0x30 [ 77.626285][ T9894] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.632508][ T9894] ? security_socket_sendmsg+0x8d/0xc0 [ 77.637946][ T9894] ? netlink_unicast+0x7e0/0x7e0 [ 77.642867][ T9894] sock_sendmsg+0xd7/0x130 [ 77.647263][ T9894] ____sys_sendmsg+0x753/0x880 [ 77.652011][ T9894] ? kernel_sendmsg+0x50/0x50 [ 77.656678][ T9894] ? __fget_files+0x337/0x520 [ 77.661334][ T9894] ? find_held_lock+0x35/0x130 [ 77.666085][ T9894] ___sys_sendmsg+0x100/0x170 [ 77.670746][ T9894] ? sendmsg_copy_msghdr+0x70/0x70 [ 77.675852][ T9894] ? __kasan_check_read+0x11/0x20 [ 77.680860][ T9894] ? __fget_files+0x359/0x520 [ 77.685522][ T9894] ? ksys_dup3+0x3e0/0x3e0 [ 77.689925][ T9894] ? __fget_light+0x1ad/0x270 [ 77.694581][ T9894] ? __fdget+0x1b/0x20 [ 77.698641][ T9894] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.704875][ T9894] __sys_sendmsg+0x105/0x1d0 [ 77.709498][ T9894] ? __sys_sendmsg_sock+0xc0/0xc0 [ 77.714503][ T9894] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 77.720480][ T9894] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.725922][ T9894] ? do_syscall_64+0x26/0x790 [ 77.730579][ T9894] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.736621][ T9894] ? do_syscall_64+0x26/0x790 [ 77.741288][ T9894] __x64_sys_sendmsg+0x78/0xb0 [ 77.746035][ T9894] do_syscall_64+0xfa/0x790 [ 77.750525][ T9894] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.756396][ T9894] RIP: 0033:0x446709 [ 77.760277][ T9894] Code: e8 1c ba 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 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 77.779864][ T9894] RSP: 002b:00007fb418636d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.788258][ T9894] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446709 [ 77.796218][ T9894] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 77.804186][ T9894] RBP: 00000000006dbc60 R08: 0000000000000000 R09: 0000000000000000 [ 77.812145][ T9894] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc6c [ 77.820098][ T9894] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 77.829320][ T9894] Kernel Offset: disabled [ 77.833712][ T9894] Rebooting in 86400 seconds..