[ 74.881291][ T27] audit: type=1800 audit(1584200032.502:25): pid=9924 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 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. [ 75.750368][ T27] kauditd_printk_skb: 3 callbacks suppressed [ 75.750383][ T27] audit: type=1800 audit(1584200033.362:29): pid=9924 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 75.777651][ T27] audit: type=1800 audit(1584200033.372:30): pid=9924 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.226' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 85.311446][T10078] IPVS: ftp: loaded support on port[0] = 21 [ 85.356777][T10085] ------------[ cut here ]------------ [ 85.362587][T10085] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 85.371615][T10085] WARNING: CPU: 0 PID: 10085 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 85.381439][T10085] Kernel panic - not syncing: panic_on_warn set ... [ 85.388219][T10085] CPU: 0 PID: 10085 Comm: syz-executor669 Not tainted 5.6.0-rc5-syzkaller #0 [ 85.396979][T10085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.407035][T10085] Call Trace: [ 85.410352][T10085] dump_stack+0x188/0x20d [ 85.414707][T10085] ? debug_print_object+0x160/0x250 [ 85.419920][T10085] panic+0x2e3/0x75c [ 85.423846][T10085] ? add_taint.cold+0x16/0x16 [ 85.428535][T10085] ? __probe_kernel_read+0x188/0x1d0 [ 85.433825][T10085] ? __warn.cold+0x14/0x35 [ 85.438355][T10085] ? __warn+0xd5/0x1c8 [ 85.442427][T10085] ? debug_print_object+0x160/0x250 [ 85.447642][T10085] __warn.cold+0x2f/0x35 [ 85.451922][T10085] ? debug_print_object+0x160/0x250 [ 85.457162][T10085] report_bug+0x27b/0x2f0 [ 85.461498][T10085] do_error_trap+0x12b/0x220 [ 85.466094][T10085] ? debug_print_object+0x160/0x250 [ 85.471291][T10085] do_invalid_op+0x32/0x40 [ 85.475700][T10085] ? debug_print_object+0x160/0x250 [ 85.480953][T10085] invalid_op+0x23/0x30 [ 85.485114][T10085] RIP: 0010:debug_print_object+0x160/0x250 [ 85.490927][T10085] Code: dd 80 f5 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 80 f5 51 88 48 c7 c7 e0 ea 51 88 e8 18 cb b1 fd <0f> 0b 83 05 6b db d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 85.510558][T10085] RSP: 0018:ffffc90002137178 EFLAGS: 00010282 [ 85.516636][T10085] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 85.524626][T10085] RDX: 0000000000000000 RSI: ffffffff815bf511 RDI: fffff52000426e21 [ 85.535978][T10085] RBP: 0000000000000001 R08: ffff8880a234e500 R09: fffffbfff180f578 [ 85.544626][T10085] R10: fffffbfff180f577 R11: ffffffff8c07abbf R12: ffffffff897acba0 [ 85.553320][T10085] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000426e3c [ 85.561310][T10085] ? vprintk_func+0x81/0x17e [ 85.565913][T10085] ? debug_print_object+0x160/0x250 [ 85.571136][T10085] ? lockdep_hardirqs_on+0x417/0x5d0 [ 85.576471][T10085] debug_object_activate+0x346/0x470 [ 85.581807][T10085] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 85.587649][T10085] ? debug_object_init_on_stack+0x20/0x20 [ 85.593381][T10085] ? find_held_lock+0x2d/0x110 [ 85.598288][T10085] ? free_object+0x70/0x70 [ 85.602746][T10085] ? lock_downgrade+0x7f0/0x7f0 [ 85.607602][T10085] ? delayed_work_timer_fn+0x90/0x90 [ 85.612925][T10085] call_rcu+0x2c/0x690 [ 85.617025][T10085] queue_rcu_work+0x82/0xa0 [ 85.621638][T10085] route4_change+0x19e8/0x2250 [ 85.626413][T10085] ? route4_destroy+0x800/0x800 [ 85.631318][T10085] ? wait_for_completion+0x3c0/0x3c0 [ 85.636686][T10085] tc_new_tfilter+0xa59/0x20b0 [ 85.641468][T10085] ? route4_destroy+0x800/0x800 [ 85.646328][T10085] ? tc_del_tfilter+0x1430/0x1430 [ 85.651376][T10085] ? __lock_acquire+0x80b/0x3ca0 [ 85.656362][T10085] ? apparmor_capable+0x454/0x8a0 [ 85.661408][T10085] ? rcu_read_lock_held+0x9c/0xb0 [ 85.666447][T10085] ? tc_del_tfilter+0x1430/0x1430 [ 85.671470][T10085] rtnetlink_rcv_msg+0x810/0xad0 [ 85.676412][T10085] ? rtnl_bridge_getlink+0x870/0x870 [ 85.681697][T10085] ? mark_held_locks+0xe0/0xe0 [ 85.686452][T10085] ? netlink_deliver_tap+0x146/0xb50 [ 85.691730][T10085] netlink_rcv_skb+0x15a/0x410 [ 85.696505][T10085] ? rtnl_bridge_getlink+0x870/0x870 [ 85.701801][T10085] ? netlink_ack+0xa80/0xa80 [ 85.706487][T10085] netlink_unicast+0x537/0x740 [ 85.711278][T10085] ? netlink_attachskb+0x810/0x810 [ 85.716426][T10085] ? _copy_from_iter_full+0x25c/0x870 [ 85.721806][T10085] ? __phys_addr_symbol+0x2c/0x70 [ 85.726818][T10085] ? __check_object_size+0x171/0x437 [ 85.732105][T10085] netlink_sendmsg+0x882/0xe10 [ 85.736867][T10085] ? aa_af_perm+0x260/0x260 [ 85.741357][T10085] ? netlink_unicast+0x740/0x740 [ 85.746295][T10085] ? netlink_unicast+0x740/0x740 [ 85.751239][T10085] sock_sendmsg+0xcf/0x120 [ 85.755645][T10085] ____sys_sendmsg+0x6b9/0x7d0 [ 85.760396][T10085] ? kernel_sendmsg+0x50/0x50 [ 85.765091][T10085] ___sys_sendmsg+0x100/0x170 [ 85.769772][T10085] ? sendmsg_copy_msghdr+0x70/0x70 [ 85.774930][T10085] ? __fget_files+0x329/0x4f0 [ 85.779635][T10085] ? ksys_dup3+0x3c0/0x3c0 [ 85.784083][T10085] ? __fget_light+0x208/0x270 [ 85.788895][T10085] __sys_sendmsg+0xec/0x1b0 [ 85.793470][T10085] ? __sys_sendmsg_sock+0xb0/0xb0 [ 85.798548][T10085] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 85.804556][T10085] ? __x64_sys_futex+0x380/0x4f0 [ 85.809508][T10085] ? trace_hardirqs_off_caller+0x55/0x230 [ 85.815247][T10085] ? do_syscall_64+0x21/0x7d0 [ 85.819926][T10085] do_syscall_64+0xf6/0x7d0 [ 85.824469][T10085] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.830401][T10085] RIP: 0033:0x446e09 [ 85.834336][T10085] 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 [ 85.853939][T10085] RSP: 002b:00007f19b83b0d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 85.862349][T10085] RAX: ffffffffffffffda RBX: 00000000006dbc78 RCX: 0000000000446e09 [ 85.870318][T10085] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000006 [ 85.878394][T10085] RBP: 00000000006dbc70 R08: 0000000000000000 R09: 0000000000000000 [ 85.886449][T10085] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc7c [ 85.894416][T10085] R13: 0000000000000005 R14: 00a3a20740000000 R15: 0507002400000038 [ 85.903728][T10085] Kernel Offset: disabled [ 85.908129][T10085] Rebooting in 86400 seconds..