[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. 2020/11/12 12:08:15 fuzzer started 2020/11/12 12:08:16 connecting to host at 10.128.0.26:46793 2020/11/12 12:08:16 checking machine... 2020/11/12 12:08:16 checking revisions... 2020/11/12 12:08:17 testing simple program... executing program executing program syzkaller login: [ 155.793961][ T8260] IPVS: ftp: loaded support on port[0] = 21 [ 156.085646][ T8260] chnl_net:caif_netlink_parms(): no params data found [ 156.264262][ T8260] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.271414][ T8260] bridge0: port 1(bridge_slave_0) entered disabled state [ 156.281221][ T8260] device bridge_slave_0 entered promiscuous mode [ 156.294547][ T8260] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.301802][ T8260] bridge0: port 2(bridge_slave_1) entered disabled state [ 156.311426][ T8260] device bridge_slave_1 entered promiscuous mode [ 156.344220][ T8260] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 156.357798][ T8260] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 156.393345][ T8260] team0: Port device team_slave_0 added [ 156.403055][ T8260] team0: Port device team_slave_1 added [ 156.431909][ T8260] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 156.439050][ T8260] 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. [ 156.465276][ T8260] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 156.478534][ T8260] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 156.485749][ T8260] 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. [ 156.511856][ T8260] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 156.556656][ T8260] device hsr_slave_0 entered promiscuous mode [ 156.564565][ T8260] device hsr_slave_1 entered promiscuous mode [ 156.744969][ T8260] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 156.759993][ T8260] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 156.777487][ T8260] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 156.794836][ T8260] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 156.884008][ T8260] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.891158][ T8260] bridge0: port 2(bridge_slave_1) entered forwarding state [ 156.899074][ T8260] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.906576][ T8260] bridge0: port 1(bridge_slave_0) entered forwarding state [ 156.985042][ T8260] 8021q: adding VLAN 0 to HW filter on device bond0 [ 157.006266][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 157.017580][ T32] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.029853][ T32] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.040732][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 157.061370][ T8260] 8021q: adding VLAN 0 to HW filter on device team0 [ 157.076100][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 157.086022][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 157.095789][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.103204][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.117866][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 157.127317][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 157.137076][ T2976] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.144488][ T2976] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.162592][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 157.182621][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 157.205433][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 157.214774][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 157.225015][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 157.234797][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 157.261269][ T8260] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 157.271740][ T8260] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 157.292971][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 157.303190][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 157.312679][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 157.321823][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 157.330998][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 157.346707][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 157.372088][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 157.379901][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 157.404132][ T8260] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 157.439657][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 157.448779][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 157.482622][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 157.491525][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 157.509314][ T8260] device veth0_vlan entered promiscuous mode [ 157.517451][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 157.526693][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 157.549928][ T8260] device veth1_vlan entered promiscuous mode [ 157.589522][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 157.598171][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 157.607598][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 157.617036][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready executing program [ 157.634402][ T8260] device veth0_macvtap entered promiscuous mode [ 157.651550][ T8260] device veth1_macvtap entered promiscuous mode [ 157.681637][ T8260] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 157.689851][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 157.699515][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 157.708811][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 157.718280][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 157.739086][ T8260] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 157.746708][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 157.756615][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 157.761565][ T32] Bluetooth: hci0: command 0x0409 tx timeout [ 157.780407][ T8260] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.789317][ T8260] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.798546][ T8260] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.808174][ T8260] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.018809][ T219] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.026788][ T219] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.035794][ T8481] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 158.098117][ T219] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.106260][ T219] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.114701][ T8479] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/12 12:08:26 building call list... [ 159.061166][ T1336] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.315238][ T1336] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.482851][ T1336] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.695499][ T1336] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 162.515159][ T1336] device hsr_slave_0 left promiscuous mode [ 162.537824][ T1336] device hsr_slave_1 left promiscuous mode [ 162.559023][ T1336] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 162.566608][ T1336] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 162.578442][ T1336] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 162.586197][ T1336] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 162.597258][ T1336] device bridge_slave_1 left promiscuous mode [ 162.604294][ T1336] bridge0: port 2(bridge_slave_1) entered disabled state [ 162.618242][ T1336] device bridge_slave_0 left promiscuous mode [ 162.625127][ T1336] bridge0: port 1(bridge_slave_0) entered disabled state [ 162.649080][ T1336] device veth1_macvtap left promiscuous mode [ 162.655405][ T1336] device veth0_macvtap left promiscuous mode [ 162.661537][ T1336] device veth1_vlan left promiscuous mode [ 162.667747][ T1336] device veth0_vlan left promiscuous mode executing program [ 166.411400][ T1336] team0 (unregistering): Port device team_slave_1 removed [ 166.436101][ T1336] team0 (unregistering): Port device team_slave_0 removed [ 166.462595][ T1336] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 166.488501][ T1336] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 166.591713][ T1336] bond0 (unregistering): Released all slaves [ 167.484500][ T1336] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 167.492414][ T1336] #PF: supervisor read access in kernel mode [ 167.498463][ T1336] #PF: error_code(0x0000) - not-present page [ 167.504506][ T1336] PGD 11c442067 P4D 11c442067 PUD 12323f067 PMD 0 [ 167.511237][ T1336] Oops: 0000 [#1] SMP [ 167.515321][ T1336] CPU: 1 PID: 1336 Comm: kworker/u4:15 Not tainted 5.10.0-rc1-syzkaller #0 [ 167.523977][ T1336] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.534145][ T1336] Workqueue: netns cleanup_net [ 167.539060][ T1336] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 167.544554][ T1336] 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 [ 167.564347][ T1336] RSP: 0018:ffff8881053c3a38 EFLAGS: 00010246 [ 167.570529][ T1336] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105e01ec0 [ 167.578593][ T1336] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888126f1a800 [ 167.586667][ T1336] RBP: ffff8881053c3ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 167.594747][ T1336] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 167.602811][ T1336] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105e028c0 [ 167.610891][ T1336] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 167.619915][ T1336] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 167.626584][ T1336] CR2: 000000000000009c CR3: 000000011c406000 CR4: 00000000001506e0 [ 167.634644][ T1336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 167.642699][ T1336] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 167.650754][ T1336] Call Trace: [ 167.654169][ T1336] ? up_write+0x62/0x220 [ 167.658529][ T1336] afs_cell_purge+0xfb/0x5e0 [ 167.663244][ T1336] ? del_timer_sync+0x131/0x1f0 [ 167.668225][ T1336] ? afs_fs_probe_cleanup+0x111/0x140 [ 167.673714][ T1336] afs_net_exit+0xc6/0x180 [ 167.678247][ T1336] ? afs_net_init+0xe90/0xe90 [ 167.683023][ T1336] cleanup_net+0xd73/0x1af0 [ 167.687635][ T1336] ? ops_init+0x7d0/0x7d0 [ 167.692077][ T1336] process_one_work+0x121c/0x1fc0 [ 167.697242][ T1336] worker_thread+0x10cc/0x2740 [ 167.702109][ T1336] ? kmsan_get_metadata+0x116/0x180 [ 167.707411][ T1336] ? kmsan_get_metadata+0x116/0x180 [ 167.712739][ T1336] kthread+0x51c/0x560 [ 167.716910][ T1336] ? process_one_work+0x1fc0/0x1fc0 [ 167.722231][ T1336] ? kthread_blkcg+0x110/0x110 [ 167.727094][ T1336] ret_from_fork+0x1f/0x30 [ 167.731577][ T1336] Modules linked in: [ 167.735561][ T1336] CR2: 000000000000009c [ 167.739805][ T1336] ---[ end trace 3dacc9547d457794 ]--- [ 167.745378][ T1336] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 167.750863][ T1336] 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 [ 167.770560][ T1336] RSP: 0018:ffff8881053c3a38 EFLAGS: 00010246 [ 167.776735][ T1336] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105e01ec0 [ 167.784795][ T1336] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888126f1a800 [ 167.792859][ T1336] RBP: ffff8881053c3ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 167.800907][ T1336] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 167.808961][ T1336] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105e028c0 [ 167.817034][ T1336] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 167.826048][ T1336] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 167.832714][ T1336] CR2: 000000000000009c CR3: 000000011c406000 CR4: 00000000001506e0 [ 167.840784][ T1336] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 167.848837][ T1336] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 167.856882][ T1336] Kernel panic - not syncing: Fatal exception [ 167.863611][ T1336] Kernel Offset: disabled [ 167.867967][ T1336] Rebooting in 86400 seconds..