[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts. 2020/11/13 16:05:43 fuzzer started 2020/11/13 16:05:44 connecting to host at 10.128.0.26:38783 2020/11/13 16:05:44 checking machine... 2020/11/13 16:05:44 checking revisions... 2020/11/13 16:05:44 testing simple program... executing program executing program syzkaller login: [ 156.522873][ T8283] IPVS: ftp: loaded support on port[0] = 21 [ 156.851172][ T8283] chnl_net:caif_netlink_parms(): no params data found [ 156.952888][ T8283] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.960147][ T8283] bridge0: port 1(bridge_slave_0) entered disabled state [ 156.969799][ T8283] device bridge_slave_0 entered promiscuous mode [ 156.980074][ T8283] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.987490][ T8283] bridge0: port 2(bridge_slave_1) entered disabled state [ 156.996892][ T8283] device bridge_slave_1 entered promiscuous mode [ 157.031877][ T8283] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 157.046525][ T8283] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 157.080816][ T8283] team0: Port device team_slave_0 added [ 157.090487][ T8283] team0: Port device team_slave_1 added [ 157.121586][ T8283] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 157.128760][ T8283] 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. [ 157.155258][ T8283] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 157.168671][ T8283] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 157.175928][ T8283] 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. [ 157.202195][ T8283] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 157.245656][ T8283] device hsr_slave_0 entered promiscuous mode [ 157.253133][ T8283] device hsr_slave_1 entered promiscuous mode [ 157.429854][ T8283] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 157.441409][ T8283] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 157.474976][ T8283] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 157.492120][ T8283] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 157.570737][ T8283] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.577957][ T8283] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.585919][ T8283] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.593093][ T8283] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.672456][ T8283] 8021q: adding VLAN 0 to HW filter on device bond0 [ 157.694793][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 157.708776][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.717565][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.730217][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 157.748908][ T8283] 8021q: adding VLAN 0 to HW filter on device team0 [ 157.768131][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 157.777049][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.784484][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.807393][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 157.816757][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.824130][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.840744][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 157.865503][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 157.875176][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 157.886127][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 157.895704][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 157.923260][ T8283] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 157.933852][ T8283] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 157.951291][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 157.961494][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 157.971375][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 157.981314][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 157.990955][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 158.012700][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 158.037896][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 158.046004][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 158.069156][ T8283] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 158.103292][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 158.112930][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 158.147996][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 158.157669][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 158.175722][ T8283] device veth0_vlan entered promiscuous mode [ 158.185321][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 158.195026][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 158.216130][ T8283] device veth1_vlan entered promiscuous mode [ 158.258063][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 158.267492][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 158.276994][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 158.286531][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 158.303202][ T8283] device veth0_macvtap entered promiscuous mode [ 158.320704][ T8283] device veth1_macvtap entered promiscuous mode [ 158.354154][ T8283] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 158.361794][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 158.371626][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 158.380707][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 158.390736][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 158.410320][ T8283] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 158.418053][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 158.425023][ T5] Bluetooth: hci0: command 0x0409 tx timeout [ 158.427871][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 158.450040][ T8283] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.459891][ T8283] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.468988][ T8283] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.478012][ T8283] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 158.724802][ T295] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.732749][ T295] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.760328][ T8494] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 158.822182][ T235] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.831455][ T235] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.839595][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/13 16:05:54 building call list... [ 159.840183][ T295] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.045663][ T295] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.222386][ T295] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.405530][ T295] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 163.414907][ T295] device hsr_slave_0 left promiscuous mode [ 163.432984][ T295] device hsr_slave_1 left promiscuous mode [ 163.464854][ T295] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 163.472372][ T295] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 163.487667][ T295] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 163.495580][ T295] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 163.508962][ T295] device bridge_slave_1 left promiscuous mode [ 163.515976][ T295] bridge0: port 2(bridge_slave_1) entered disabled state [ 163.528586][ T295] device bridge_slave_0 left promiscuous mode [ 163.535506][ T295] bridge0: port 1(bridge_slave_0) entered disabled state [ 163.559939][ T295] device veth1_macvtap left promiscuous mode [ 163.566256][ T295] device veth0_macvtap left promiscuous mode [ 163.572397][ T295] device veth1_vlan left promiscuous mode [ 163.578520][ T295] device veth0_vlan left promiscuous mode executing program [ 167.217921][ T295] team0 (unregistering): Port device team_slave_1 removed [ 167.242849][ T295] team0 (unregistering): Port device team_slave_0 removed [ 167.265262][ T295] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 167.291416][ T295] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 167.397770][ T295] bond0 (unregistering): Released all slaves executing program [ 168.205997][ T295] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 168.213902][ T295] #PF: supervisor read access in kernel mode [ 168.219953][ T295] #PF: error_code(0x0000) - not-present page [ 168.225993][ T295] PGD 11c503067 P4D 11c503067 PUD 120208067 PMD 0 [ 168.232714][ T295] Oops: 0000 [#1] SMP [ 168.236796][ T295] CPU: 0 PID: 295 Comm: kworker/u4:5 Not tainted 5.10.0-rc1-syzkaller #0 [ 168.245284][ T295] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 168.255470][ T295] Workqueue: netns cleanup_net [ 168.260398][ T295] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.265887][ T295] Code: 4d 8b 6f 08 45 8b a7 88 0c 00 00 41 8b 87 90 0c 00 00 89 45 d4 e8 b9 d7 78 fd 49 8d 9e 9c 00 00 00 4d 85 ed 0f 85 30 04 00 00 <41> 8b 86 9c 00 00 00 89 45 8c 48 89 df e8 a7 f8 f7 fd 8b 18 8b 0a [ 168.286554][ T295] RSP: 0018:ffff8881045afa38 EFLAGS: 00010246 [ 168.292737][ T295] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff8881045a5c40 [ 168.300796][ T295] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881201c2000 [ 168.308870][ T295] RBP: ffff8881045afac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.316928][ T295] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.324989][ T295] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881045a6640 [ 168.333059][ T295] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 168.342083][ T295] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.348754][ T295] CR2: 000000000000009c CR3: 0000000122650000 CR4: 00000000001506f0 [ 168.356814][ T295] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.364875][ T295] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.372930][ T295] Call Trace: [ 168.376335][ T295] ? up_write+0x62/0x220 [ 168.380691][ T295] afs_cell_purge+0xfb/0x5e0 [ 168.385409][ T295] ? del_timer_sync+0x131/0x1f0 [ 168.390386][ T295] ? afs_fs_probe_cleanup+0x111/0x140 [ 168.395872][ T295] afs_net_exit+0xc6/0x180 [ 168.400405][ T295] ? afs_net_init+0xe90/0xe90 [ 168.405201][ T295] cleanup_net+0xd73/0x1af0 [ 168.409810][ T295] ? ops_init+0x7d0/0x7d0 [ 168.414248][ T295] process_one_work+0x121c/0x1fc0 [ 168.419406][ T295] worker_thread+0x10cc/0x2740 [ 168.424276][ T295] ? kmsan_get_metadata+0x116/0x180 [ 168.429622][ T295] kthread+0x51c/0x560 [ 168.433798][ T295] ? process_one_work+0x1fc0/0x1fc0 [ 168.439122][ T295] ? kthread_blkcg+0x110/0x110 [ 168.443992][ T295] ret_from_fork+0x1f/0x30 [ 168.448476][ T295] Modules linked in: [ 168.452465][ T295] CR2: 000000000000009c [ 168.456711][ T295] ---[ end trace 33e6c56741339aeb ]--- [ 168.462287][ T295] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.467777][ T295] Code: 4d 8b 6f 08 45 8b a7 88 0c 00 00 41 8b 87 90 0c 00 00 89 45 d4 e8 b9 d7 78 fd 49 8d 9e 9c 00 00 00 4d 85 ed 0f 85 30 04 00 00 <41> 8b 86 9c 00 00 00 89 45 8c 48 89 df e8 a7 f8 f7 fd 8b 18 8b 0a [ 168.487485][ T295] RSP: 0018:ffff8881045afa38 EFLAGS: 00010246 [ 168.493675][ T295] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff8881045a5c40 [ 168.501730][ T295] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881201c2000 [ 168.510586][ T295] RBP: ffff8881045afac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.518643][ T295] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.526708][ T295] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881045a6640 [ 168.534781][ T295] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 168.543803][ T295] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.550495][ T295] CR2: 000000000000009c CR3: 0000000122650000 CR4: 00000000001506f0 [ 168.558583][ T295] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.566641][ T295] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.574690][ T295] Kernel panic - not syncing: Fatal exception [ 168.581489][ T295] Kernel Offset: disabled [ 168.585858][ T295] Rebooting in 86400 seconds..