[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.557772][ T27] audit: type=1800 audit(1578548706.078:25): pid=9397 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.579046][ T27] audit: type=1800 audit(1578548706.078:26): pid=9397 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.635836][ T27] audit: type=1800 audit(1578548706.078:27): pid=9397 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 '10.128.0.69' (ECDSA) to the list of known hosts. syzkaller login: [ 95.410346][ T9550] IPVS: ftp: loaded support on port[0] = 21 [ 95.477051][ T9550] chnl_net:caif_netlink_parms(): no params data found [ 95.508237][ T9550] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.517145][ T9550] bridge0: port 1(bridge_slave_0) entered disabled state [ 95.525804][ T9550] device bridge_slave_0 entered promiscuous mode [ 95.534051][ T9550] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.541973][ T9550] bridge0: port 2(bridge_slave_1) entered disabled state [ 95.549775][ T9550] device bridge_slave_1 entered promiscuous mode [ 95.568103][ T9550] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 95.580554][ T9550] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 95.600598][ T9550] team0: Port device team_slave_0 added [ 95.607855][ T9550] team0: Port device team_slave_1 added [ 95.661407][ T9550] device hsr_slave_0 entered promiscuous mode [ 95.699000][ T9550] device hsr_slave_1 entered promiscuous mode [ 95.802356][ T9550] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 95.871139][ T9550] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 95.920731][ T9550] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 95.960710][ T9550] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 96.020014][ T9550] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.027187][ T9550] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.034980][ T9550] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.042087][ T9550] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.082775][ T9550] 8021q: adding VLAN 0 to HW filter on device bond0 [ 96.095846][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 96.107174][ T2763] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.115218][ T2763] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.123286][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 96.136901][ T9550] 8021q: adding VLAN 0 to HW filter on device team0 [ 96.147099][ T3177] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 96.156307][ T3177] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.163402][ T3177] bridge0: port 1(bridge_slave_0) entered forwarding state [ 96.174613][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 96.183375][ T2763] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.190467][ T2763] bridge0: port 2(bridge_slave_1) entered forwarding state [ 96.209566][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 96.218025][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 96.227785][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 96.240390][ T2745] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 96.252909][ T9550] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 96.265491][ T9550] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 96.273450][ T2745] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 96.290677][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 96.298026][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 96.311577][ T9550] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 96.330370][ T2745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 96.349145][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 96.357652][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 96.366090][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 96.376254][ T9550] device veth0_vlan entered promiscuous mode [ 96.388482][ T9550] device veth1_vlan entered promiscuous mode [ 96.469655][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 96.477847][ T2763] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 96.549934][ T9550] ------------[ cut here ]------------ [ 96.555653][ T9550] ODEBUG: free active (active state 0) object type: work_struct hint: io_ring_file_ref_switch+0x0/0xac0 [ 96.567031][ T9550] WARNING: CPU: 0 PID: 9550 at lib/debugobjects.c:481 debug_print_object+0x168/0x250 [ 96.576467][ T9550] Kernel panic - not syncing: panic_on_warn set ... [ 96.583038][ T9550] CPU: 0 PID: 9550 Comm: syz-executor846 Not tainted 5.5.0-rc5-next-20200108-syzkaller #0 [ 96.592974][ T9550] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.603014][ T9550] Call Trace: [ 96.606294][ T9550] dump_stack+0x197/0x210 [ 96.610622][ T9550] ? debug_print_object+0xe0/0x250 [ 96.615732][ T9550] panic+0x2e3/0x75c [ 96.619614][ T9550] ? add_taint.cold+0x16/0x16 [ 96.624281][ T9550] ? __kasan_check_write+0x14/0x20 [ 96.629392][ T9550] ? __warn.cold+0x14/0x3e [ 96.633789][ T9550] ? __warn+0xd9/0x1cf [ 96.637865][ T9550] ? debug_print_object+0x168/0x250 [ 96.643047][ T9550] __warn.cold+0x2f/0x3e [ 96.647285][ T9550] ? debug_print_object+0x168/0x250 [ 96.652465][ T9550] report_bug+0x289/0x300 [ 96.656785][ T9550] do_error_trap+0x11b/0x200 [ 96.661357][ T9550] do_invalid_op+0x37/0x50 [ 96.665773][ T9550] ? debug_print_object+0x168/0x250 [ 96.670952][ T9550] invalid_op+0x23/0x30 [ 96.675226][ T9550] RIP: 0010:debug_print_object+0x168/0x250 [ 96.681017][ T9550] Code: dd 80 8b 91 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 80 8b 91 88 48 c7 c7 e0 80 91 88 e8 87 96 a2 fd <0f> 0b 83 05 43 e5 00 07 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3 [ 96.700608][ T9550] RSP: 0018:ffffc90007ef7c30 EFLAGS: 00010082 [ 96.706674][ T9550] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 96.714627][ T9550] RDX: 0000000000000000 RSI: ffffffff815e7896 RDI: fffff52000fdef78 [ 96.722580][ T9550] RBP: ffffc90007ef7c70 R08: ffff8880a2ed2000 R09: ffffed1015d045c9 [ 96.730529][ T9550] R10: ffffed1015d045c8 R11: ffff8880ae822e43 R12: 0000000000000001 [ 96.738481][ T9550] R13: ffffffff89b7c540 R14: ffffffff814c5450 R15: ffff8880a2554cb0 [ 96.746447][ T9550] ? __exit_umh+0x2e0/0x2e0 [ 96.750934][ T9550] ? vprintk_func+0x86/0x189 [ 96.755518][ T9550] debug_check_no_obj_freed+0x2d4/0x43f [ 96.761042][ T9550] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 96.766578][ T9550] kfree+0xf8/0x2c0 [ 96.770628][ T9550] io_sqe_files_unregister+0x1fb/0x2f0 [ 96.776078][ T9550] io_ring_ctx_wait_and_kill+0x430/0x9a0 [ 96.781688][ T9550] ? write_comp_data+0x30/0x70 [ 96.786429][ T9550] io_uring_release+0x42/0x50 [ 96.791093][ T9550] __fput+0x2ff/0x890 [ 96.795066][ T9550] ? io_ring_ctx_wait_and_kill+0x9a0/0x9a0 [ 96.800872][ T9550] ____fput+0x16/0x20 [ 96.804833][ T9550] task_work_run+0x145/0x1c0 [ 96.809404][ T9550] exit_to_usermode_loop+0x316/0x380 [ 96.814677][ T9550] do_syscall_64+0x676/0x790 [ 96.819248][ T9550] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.825131][ T9550] RIP: 0033:0x403280 [ 96.829018][ T9550] Code: 01 f0 ff ff 0f 83 c0 0f 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 0d 9d 2d 00 00 75 14 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 94 0f 00 00 c3 48 83 ec 08 e8 fa 04 00 00 [ 96.848780][ T9550] RSP: 002b:00007fff23decbb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 96.857256][ T9550] RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000403280 [ 96.865217][ T9550] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 [ 96.873172][ T9550] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000003 [ 96.881122][ T9550] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 96.889075][ T9550] R13: 0000000000404730 R14: 0000000000000000 R15: 0000000000000000 [ 96.898638][ T9550] Kernel Offset: disabled [ 96.903025][ T9550] Rebooting in 86400 seconds..