[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.225' (ECDSA) to the list of known hosts. 2020/11/14 03:55:18 fuzzer started 2020/11/14 03:55:19 connecting to host at 10.128.0.26:46291 2020/11/14 03:55:19 checking machine... 2020/11/14 03:55:19 checking revisions... 2020/11/14 03:55:19 testing simple program... executing program executing program syzkaller login: [ 155.601753][ T8284] IPVS: ftp: loaded support on port[0] = 21 [ 155.948169][ T8284] chnl_net:caif_netlink_parms(): no params data found [ 156.050668][ T8284] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.057913][ T8284] bridge0: port 1(bridge_slave_0) entered disabled state [ 156.067303][ T8284] device bridge_slave_0 entered promiscuous mode [ 156.077320][ T8284] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.084697][ T8284] bridge0: port 2(bridge_slave_1) entered disabled state [ 156.093091][ T8284] device bridge_slave_1 entered promiscuous mode [ 156.128290][ T8284] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 156.141356][ T8284] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 156.177415][ T8284] team0: Port device team_slave_0 added [ 156.188849][ T8284] team0: Port device team_slave_1 added [ 156.218331][ T8284] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 156.225467][ T8284] 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. [ 156.251843][ T8284] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 156.266268][ T8284] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 156.273396][ T8284] 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. [ 156.299628][ T8284] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 156.340349][ T8284] device hsr_slave_0 entered promiscuous mode [ 156.347800][ T8284] device hsr_slave_1 entered promiscuous mode [ 156.528946][ T8284] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 156.540482][ T8284] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 156.556393][ T8284] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 156.573271][ T8284] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 156.671054][ T8284] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.678270][ T8284] bridge0: port 2(bridge_slave_1) entered forwarding state [ 156.686115][ T8284] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.693330][ T8284] bridge0: port 1(bridge_slave_0) entered forwarding state [ 156.770636][ T8284] 8021q: adding VLAN 0 to HW filter on device bond0 [ 156.792097][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 156.802132][ T8233] bridge0: port 1(bridge_slave_0) entered disabled state [ 156.812658][ T8233] bridge0: port 2(bridge_slave_1) entered disabled state [ 156.823503][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 156.842910][ T8284] 8021q: adding VLAN 0 to HW filter on device team0 [ 156.857974][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 156.867184][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 156.876563][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.883938][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 156.914422][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 156.923420][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 156.933083][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.940469][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 156.949069][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 156.959882][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 156.974875][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 156.985532][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 156.996791][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 157.014163][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 157.023380][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 157.055343][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 157.065232][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 157.074766][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 157.083931][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 157.095714][ T8284] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 157.128146][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 157.136783][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 157.158305][ T8284] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 157.192276][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 157.202451][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 157.238472][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 157.247340][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 157.263031][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 157.271818][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 157.281159][ T8284] device veth0_vlan entered promiscuous mode [ 157.301572][ T8284] device veth1_vlan entered promiscuous mode [ 157.341408][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 157.350201][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 157.359626][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 157.369157][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 157.388411][ T8284] device veth0_macvtap entered promiscuous mode [ 157.402384][ T8284] device veth1_macvtap entered promiscuous mode [ 157.435199][ T8284] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 157.442632][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 157.452297][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 157.461751][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 157.471366][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 157.490240][ T8284] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 157.498717][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 157.509059][ T8233] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 157.524190][ T8233] Bluetooth: hci0: command 0x0409 tx timeout [ 157.531266][ T8284] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.540168][ T8284] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.550014][ T8284] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.558919][ T8284] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 157.816336][ T179] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 157.824734][ T179] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 157.835365][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 157.910615][ T1268] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 157.918724][ T1268] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 157.927734][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/14 03:55:28 building call list... [ 158.980077][ T1268] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.228455][ T1268] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.383886][ T1268] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.560154][ T1268] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 162.425281][ T1268] device hsr_slave_0 left promiscuous mode [ 162.459177][ T1268] device hsr_slave_1 left promiscuous mode [ 162.474431][ T1268] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 162.481944][ T1268] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 162.492318][ T1268] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 162.500116][ T1268] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 162.510351][ T1268] device bridge_slave_1 left promiscuous mode [ 162.517661][ T1268] bridge0: port 2(bridge_slave_1) entered disabled state [ 162.531259][ T1268] device bridge_slave_0 left promiscuous mode [ 162.538345][ T1268] bridge0: port 1(bridge_slave_0) entered disabled state [ 162.564708][ T1268] device veth1_macvtap left promiscuous mode [ 162.570847][ T1268] device veth0_macvtap left promiscuous mode [ 162.577369][ T1268] device veth1_vlan left promiscuous mode [ 162.583328][ T1268] device veth0_vlan left promiscuous mode executing program [ 166.528782][ T1268] team0 (unregistering): Port device team_slave_1 removed [ 166.550047][ T1268] team0 (unregistering): Port device team_slave_0 removed [ 166.572502][ T1268] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 166.599422][ T1268] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 166.701529][ T1268] bond0 (unregistering): Released all slaves [ 167.127864][ T1268] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 167.135772][ T1268] #PF: supervisor read access in kernel mode [ 167.141769][ T1268] #PF: error_code(0x0000) - not-present page [ 167.147783][ T1268] PGD 1262ef067 P4D 1262ef067 PUD 1260c1067 PMD 0 [ 167.154526][ T1268] Oops: 0000 [#1] SMP [ 167.158607][ T1268] CPU: 1 PID: 1268 Comm: kworker/u4:18 Not tainted 5.10.0-rc1-syzkaller #0 [ 167.167278][ T1268] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.177443][ T1268] Workqueue: netns cleanup_net [ 167.182345][ T1268] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 167.187838][ T1268] 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 [ 167.207544][ T1268] RSP: 0018:ffff888105ff3a38 EFLAGS: 00010246 [ 167.213735][ T1268] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105d81ec0 [ 167.221796][ T1268] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888126305000 [ 167.229862][ T1268] RBP: ffff888105ff3ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 167.237917][ T1268] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 167.245976][ T1268] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105d828c0 [ 167.254053][ T1268] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 167.263071][ T1268] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 167.269746][ T1268] CR2: 000000000000009c CR3: 000000011f738000 CR4: 00000000001506e0 [ 167.277806][ T1268] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 167.285866][ T1268] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 167.293902][ T1268] Call Trace: [ 167.297313][ T1268] ? up_write+0x62/0x220 [ 167.301672][ T1268] afs_cell_purge+0xfb/0x5e0 [ 167.306385][ T1268] ? del_timer_sync+0x131/0x1f0 [ 167.311383][ T1268] ? afs_fs_probe_cleanup+0x111/0x140 [ 167.316867][ T1268] afs_net_exit+0xc6/0x180 [ 167.321390][ T1268] ? afs_net_init+0xe90/0xe90 [ 167.326163][ T1268] cleanup_net+0xd73/0x1af0 [ 167.330777][ T1268] ? ops_init+0x7d0/0x7d0 [ 167.335215][ T1268] process_one_work+0x121c/0x1fc0 [ 167.340377][ T1268] worker_thread+0x10cc/0x2740 [ 167.345268][ T1268] ? kmsan_get_metadata+0x116/0x180 [ 167.350606][ T1268] kthread+0x51c/0x560 [ 167.354791][ T1268] ? process_one_work+0x1fc0/0x1fc0 [ 167.360112][ T1268] ? kthread_blkcg+0x110/0x110 [ 167.365081][ T1268] ret_from_fork+0x1f/0x30 [ 167.369564][ T1268] Modules linked in: [ 167.373546][ T1268] CR2: 000000000000009c [ 167.377811][ T1268] ---[ end trace 14c7cebaf746b14c ]--- [ 167.383375][ T1268] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 167.388864][ T1268] 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 [ 167.408580][ T1268] RSP: 0018:ffff888105ff3a38 EFLAGS: 00010246 [ 167.414787][ T1268] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105d81ec0 [ 167.422855][ T1268] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888126305000 [ 167.430932][ T1268] RBP: ffff888105ff3ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 167.439002][ T1268] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 167.447078][ T1268] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105d828c0 [ 167.455851][ T1268] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 167.464881][ T1268] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 167.471568][ T1268] CR2: 000000000000009c CR3: 000000011f738000 CR4: 00000000001506e0 [ 167.479669][ T1268] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 167.487735][ T1268] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 167.495789][ T1268] Kernel panic - not syncing: Fatal exception [ 167.502749][ T1268] Kernel Offset: disabled [ 167.507108][ T1268] Rebooting in 86400 seconds..