[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.195' (ECDSA) to the list of known hosts. 2020/11/12 22:51:43 fuzzer started 2020/11/12 22:51:44 connecting to host at 10.128.0.26:39097 2020/11/12 22:51:44 checking machine... 2020/11/12 22:51:44 checking revisions... 2020/11/12 22:51:45 testing simple program... executing program executing program syzkaller login: [ 156.304424][ T8271] IPVS: ftp: loaded support on port[0] = 21 [ 156.734111][ T8271] chnl_net:caif_netlink_parms(): no params data found [ 156.859304][ T8271] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.866638][ T8271] bridge0: port 1(bridge_slave_0) entered disabled state [ 156.876068][ T8271] device bridge_slave_0 entered promiscuous mode [ 156.886236][ T8271] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.893374][ T8271] bridge0: port 2(bridge_slave_1) entered disabled state [ 156.902977][ T8271] device bridge_slave_1 entered promiscuous mode [ 156.937518][ T8271] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 156.950504][ T8271] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 156.985834][ T8271] team0: Port device team_slave_0 added [ 156.996459][ T8271] team0: Port device team_slave_1 added [ 157.027615][ T8271] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 157.036273][ T8271] 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. [ 157.063092][ T8271] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 157.078507][ T8271] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 157.086184][ T8271] 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. [ 157.112452][ T8271] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 157.156944][ T8271] device hsr_slave_0 entered promiscuous mode [ 157.166669][ T8271] device hsr_slave_1 entered promiscuous mode [ 157.349277][ T8271] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 157.361124][ T8271] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 157.377955][ T8271] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 157.395455][ T8271] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 157.491694][ T8271] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.498929][ T8271] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.506814][ T8271] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.514260][ T8271] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.525038][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.536443][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.618129][ T8271] 8021q: adding VLAN 0 to HW filter on device bond0 [ 157.641116][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 157.649521][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 157.666965][ T8271] 8021q: adding VLAN 0 to HW filter on device team0 [ 157.682393][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 157.691916][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 157.701379][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.708771][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.749043][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 157.759261][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 157.768603][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.775916][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.784882][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 157.795584][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 157.806033][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 157.815314][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 157.825380][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 157.835111][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 157.849025][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 157.869662][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 157.879012][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 157.902148][ T8271] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 157.915092][ T8271] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 157.924556][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 157.933384][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 157.966234][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 157.975168][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 157.994885][ T8271] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 158.029563][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 158.038927][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 158.076665][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 158.085920][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 158.103684][ T8271] device veth0_vlan entered promiscuous mode [ 158.112463][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 158.121280][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 158.146329][ T8271] device veth1_vlan entered promiscuous mode [ 158.188146][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 158.196872][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 158.206468][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 158.215991][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 158.236237][ T8271] device veth0_macvtap entered promiscuous mode [ 158.252001][ T8271] device veth1_macvtap entered promiscuous mode [ 158.284122][ T8271] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 158.291607][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 158.301200][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 158.310517][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 158.319981][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 158.336169][ T17] Bluetooth: hci0: command 0x0409 tx timeout [ 158.342087][ T8271] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 158.350126][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 158.360104][ T2976] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 158.378346][ T8271] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.387459][ T8271] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.396388][ T8271] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.405431][ T8271] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 158.701212][ T146] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.709526][ T146] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.732480][ T3687] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 158.784127][ T264] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.793102][ T264] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.804533][ T3687] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/12 22:51:54 building call list... [ 159.788848][ T795] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.077342][ T795] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.238280][ T795] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.385978][ T795] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 163.183113][ T795] device hsr_slave_0 left promiscuous mode [ 163.207329][ T795] device hsr_slave_1 left promiscuous mode [ 163.219447][ T795] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 163.227435][ T795] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 163.238339][ T795] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 163.246188][ T795] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 163.257625][ T795] device bridge_slave_1 left promiscuous mode [ 163.265292][ T795] bridge0: port 2(bridge_slave_1) entered disabled state [ 163.279649][ T795] device bridge_slave_0 left promiscuous mode [ 163.286826][ T795] bridge0: port 1(bridge_slave_0) entered disabled state [ 163.311094][ T795] device veth1_macvtap left promiscuous mode [ 163.317345][ T795] device veth0_macvtap left promiscuous mode [ 163.323482][ T795] device veth1_vlan left promiscuous mode [ 163.329640][ T795] device veth0_vlan left promiscuous mode executing program [ 167.153450][ T795] team0 (unregistering): Port device team_slave_1 removed [ 167.188241][ T795] team0 (unregistering): Port device team_slave_0 removed [ 167.220078][ T795] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 167.245628][ T795] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 167.352314][ T795] bond0 (unregistering): Released all slaves executing program [ 167.806032][ T795] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 167.813972][ T795] #PF: supervisor read access in kernel mode [ 167.820101][ T795] #PF: error_code(0x0000) - not-present page [ 167.826140][ T795] PGD 12623d067 P4D 12623d067 PUD 12628a067 PMD 0 [ 167.832745][ T795] Oops: 0000 [#1] SMP [ 167.836753][ T795] CPU: 0 PID: 795 Comm: kworker/u4:9 Not tainted 5.10.0-rc1-syzkaller #0 [ 167.845175][ T795] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.855269][ T795] Workqueue: netns cleanup_net [ 167.860081][ T795] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 167.865508][ T795] 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 [ 167.885366][ T795] RSP: 0018:ffff888102d17a38 EFLAGS: 00010246 [ 167.891478][ T795] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105e09ec0 [ 167.899483][ T795] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888141303800 [ 167.907579][ T795] RBP: ffff888102d17ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 167.915575][ T795] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 167.923578][ T795] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105e0a8c0 [ 167.931585][ T795] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 167.940601][ T795] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 167.947276][ T795] CR2: 000000000000009c CR3: 0000000115a0e000 CR4: 00000000001506f0 [ 167.955334][ T795] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 167.963388][ T795] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 167.971420][ T795] Call Trace: [ 167.974835][ T795] ? up_write+0x62/0x220 [ 167.979188][ T795] afs_cell_purge+0xfb/0x5e0 [ 167.983893][ T795] ? del_timer_sync+0x131/0x1f0 [ 167.988864][ T795] ? afs_fs_probe_cleanup+0x111/0x140 [ 167.994344][ T795] afs_net_exit+0xc6/0x180 [ 167.998874][ T795] ? afs_net_init+0xe90/0xe90 [ 168.003645][ T795] cleanup_net+0xd73/0x1af0 [ 168.008259][ T795] ? ops_init+0x7d0/0x7d0 [ 168.012698][ T795] process_one_work+0x121c/0x1fc0 [ 168.017861][ T795] worker_thread+0x10cc/0x2740 [ 168.024205][ T795] ? kmsan_get_metadata+0x116/0x180 [ 168.029547][ T795] kthread+0x51c/0x560 [ 168.033723][ T795] ? process_one_work+0x1fc0/0x1fc0 [ 168.039046][ T795] ? kthread_blkcg+0x110/0x110 [ 168.043918][ T795] ret_from_fork+0x1f/0x30 [ 168.048401][ T795] Modules linked in: [ 168.052384][ T795] CR2: 000000000000009c [ 168.056780][ T795] ---[ end trace 987e4af2175554f3 ]--- [ 168.062365][ T795] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.067858][ T795] 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 [ 168.087578][ T795] RSP: 0018:ffff888102d17a38 EFLAGS: 00010246 [ 168.093764][ T795] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105e09ec0 [ 168.101842][ T795] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888141303800 [ 168.109913][ T795] RBP: ffff888102d17ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.117969][ T795] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.126026][ T795] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105e0a8c0 [ 168.134095][ T795] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 168.143137][ T795] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.149807][ T795] CR2: 000000000000009c CR3: 0000000115a0e000 CR4: 00000000001506f0 [ 168.157860][ T795] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.165920][ T795] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.174058][ T795] Kernel panic - not syncing: Fatal exception [ 168.180869][ T795] Kernel Offset: disabled [ 168.185383][ T795] Rebooting in 86400 seconds..