[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.124' (ECDSA) to the list of known hosts. 2021/02/21 07:58:22 parsed 1 programs 2021/02/21 07:58:22 executed programs: 0 syzkaller login: [ 413.840955] IPVS: ftp: loaded support on port[0] = 21 [ 413.926872] chnl_net:caif_netlink_parms(): no params data found [ 414.006834] bridge0: port 1(bridge_slave_0) entered blocking state [ 414.014607] bridge0: port 1(bridge_slave_0) entered disabled state [ 414.024261] device bridge_slave_0 entered promiscuous mode [ 414.034384] bridge0: port 2(bridge_slave_1) entered blocking state [ 414.043955] bridge0: port 2(bridge_slave_1) entered disabled state [ 414.053456] device bridge_slave_1 entered promiscuous mode [ 414.072438] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 414.083017] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 414.102920] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 414.112140] team0: Port device team_slave_0 added [ 414.118678] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 414.128037] team0: Port device team_slave_1 added [ 414.144858] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 414.152129] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 414.181903] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 414.195243] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 414.203049] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 414.231543] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 414.243726] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 414.252377] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 414.273412] device hsr_slave_0 entered promiscuous mode [ 414.279729] device hsr_slave_1 entered promiscuous mode [ 414.286835] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 414.295820] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 414.364177] bridge0: port 2(bridge_slave_1) entered blocking state [ 414.371917] bridge0: port 2(bridge_slave_1) entered forwarding state [ 414.379776] bridge0: port 1(bridge_slave_0) entered blocking state [ 414.387719] bridge0: port 1(bridge_slave_0) entered forwarding state [ 414.417696] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 414.425658] 8021q: adding VLAN 0 to HW filter on device bond0 [ 414.435256] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 414.445442] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 414.465561] bridge0: port 1(bridge_slave_0) entered disabled state [ 414.476394] bridge0: port 2(bridge_slave_1) entered disabled state [ 414.489934] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 414.498895] 8021q: adding VLAN 0 to HW filter on device team0 [ 414.508216] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 414.517609] bridge0: port 1(bridge_slave_0) entered blocking state [ 414.524880] bridge0: port 1(bridge_slave_0) entered forwarding state [ 414.538138] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 414.547565] bridge0: port 2(bridge_slave_1) entered blocking state [ 414.554838] bridge0: port 2(bridge_slave_1) entered forwarding state [ 414.572138] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 414.584431] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 414.592968] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 414.605868] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 414.619350] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 414.633524] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 414.642807] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 414.651262] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 414.664823] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 414.674477] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 414.684002] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 414.696492] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 414.758125] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 414.771257] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 414.801876] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 414.810189] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 414.819351] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 414.832738] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 414.842683] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 414.850495] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 414.862406] device veth0_vlan entered promiscuous mode [ 414.873898] device veth1_vlan entered promiscuous mode [ 414.881523] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 414.890472] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 414.903514] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 414.916481] device veth0_macvtap entered promiscuous mode [ 414.924494] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 414.933358] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 414.941079] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 414.950094] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 414.959684] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 414.969401] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 414.982885] device veth1_macvtap entered promiscuous mode [ 414.994462] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 415.005503] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 415.016958] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 415.026712] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 415.036376] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 415.047266] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 415.060451] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 415.068664] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 415.076671] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 415.085611] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 415.862412] Bluetooth: hci0 command 0x0409 tx timeout [ 416.693713] netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. [ 416.705990] netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. [ 416.716629] netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. [ 416.726762] netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. [ 416.739475] netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. [ 416.751540] netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. [ 416.761821] block nbd0: NBD_DISCONNECT [ 416.766228] kasan: CONFIG_KASAN_INLINE enabled [ 416.770982] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 416.779240] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 416.786340] Modules linked in: [ 416.789888] CPU: 0 PID: 8675 Comm: systemd-udevd Not tainted 4.14.221-syzkaller #0 [ 416.798428] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 416.809177] task: ffff88808fab6500 task.stack: ffff888096720000 [ 416.816152] RIP: 0010:__lock_acquire+0x1cc/0x3f20 [ 416.821590] RSP: 0018:ffff888096727938 EFLAGS: 00010006 [ 416.827501] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 416.835597] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000110 [ 416.843583] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 416.851114] R10: 0000000000000001 R11: ffff88808fab6500 R12: 0000000000000110 [ 416.859118] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8beb5d40 [ 416.866825] FS: 00007f7ceef368c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 416.875672] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 416.882326] CR2: 00007f920ac60000 CR3: 00000000a8e87000 CR4: 00000000001406f0 [ 416.890968] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 416.898732] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 416.908356] Call Trace: [ 416.911481] ? vprintk_emit+0x170/0x620 [ 416.915644] ? dev_vprintk_emit+0x1da/0x440 [ 416.919986] ? trace_hardirqs_on+0x10/0x10 [ 416.924754] ? dev_driver_string+0x160/0x160 [ 416.929786] ? __schedule+0x893/0x1de0 [ 416.933949] ? __mutex_lock+0x356/0x1310 [ 416.938547] lock_acquire+0x170/0x3f0 [ 416.942930] ? flush_workqueue+0xcb/0x1310 [ 416.947700] flush_workqueue+0xfa/0x1310 [ 416.952221] ? flush_workqueue+0xcb/0x1310 [ 416.956903] ? nbd_disconnect_and_put+0x99/0x140 [ 416.961934] ? lock_downgrade+0x740/0x740 [ 416.966713] ? check_flush_dependency+0x2a0/0x2a0 [ 416.972355] nbd_disconnect_and_put+0xc3/0x140 [ 416.977821] nbd_release+0x123/0x150 [ 416.982688] ? nbd_queue_rq+0xc50/0xc50 [ 416.987311] __blkdev_put+0x5aa/0x800 [ 416.991301] ? revalidate_disk+0x1f0/0x1f0 [ 416.995762] ? locks_remove_file+0x2cd/0x420 [ 417.000706] ? blkdev_put+0x75/0x4c0 [ 417.004646] ? blkdev_put+0x4c0/0x4c0 [ 417.008574] blkdev_close+0x86/0xb0 [ 417.013390] __fput+0x25f/0x7a0 [ 417.017038] task_work_run+0x11f/0x190 [ 417.021586] exit_to_usermode_loop+0x1ad/0x200 [ 417.026629] do_syscall_64+0x4a3/0x640 [ 417.030736] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 417.036504] RIP: 0033:0x7f7cee07d270 [ 417.040942] RSP: 002b:00007ffe05560e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 417.049438] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f7cee07d270 [ 417.057685] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 [ 417.065333] RBP: 00007f7ceef36710 R08: 000000000000004a R09: 0000000000000008 [ 417.073275] R10: 00005601fe9a4628 R11: 0000000000000246 R12: 0000000000000000 [ 417.081922] R13: 00005601fe9ab660 R14: 0000000000000003 R15: 000000000000000e [ 417.090132] Code: 18 00 00 00 00 48 81 c4 80 01 00 00 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 67 2a 00 00 49 81 3c 24 a0 17 2e 8b 0f 84 5f [ 417.110404] RIP: __lock_acquire+0x1cc/0x3f20 RSP: ffff888096727938 [ 417.117252] ---[ end trace 703a04cd65b7e621 ]--- [ 417.122370] Kernel panic - not syncing: Fatal exception [ 417.130101] Kernel Offset: disabled [ 417.134823] Rebooting in 86400 seconds..