[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ 117.549963][ T7931] sshd (7931) used greatest stack depth: 4152 bytes left Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.190' (ECDSA) to the list of known hosts. 2020/11/14 04:08:36 fuzzer started 2020/11/14 04:08:37 connecting to host at 10.128.0.26:40713 2020/11/14 04:08:37 checking machine... 2020/11/14 04:08:37 checking revisions... 2020/11/14 04:08:37 testing simple program... executing program executing program syzkaller login: [ 155.907766][ T8274] IPVS: ftp: loaded support on port[0] = 21 [ 156.296852][ T8274] chnl_net:caif_netlink_parms(): no params data found [ 156.386159][ T8274] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.393303][ T8274] bridge0: port 1(bridge_slave_0) entered disabled state [ 156.402837][ T8274] device bridge_slave_0 entered promiscuous mode [ 156.413236][ T8274] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.420663][ T8274] bridge0: port 2(bridge_slave_1) entered disabled state [ 156.429854][ T8274] device bridge_slave_1 entered promiscuous mode [ 156.464629][ T8274] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 156.479555][ T8274] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 156.513981][ T8274] team0: Port device team_slave_0 added [ 156.523259][ T8274] team0: Port device team_slave_1 added [ 156.557838][ T8274] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 156.564968][ T8274] 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. [ 156.591171][ T8274] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 156.605152][ T8274] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 156.612188][ T8274] 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. [ 156.638665][ T8274] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 156.681117][ T8274] device hsr_slave_0 entered promiscuous mode [ 156.688675][ T8274] device hsr_slave_1 entered promiscuous mode [ 156.870827][ T8274] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 156.882377][ T8274] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 156.913002][ T8274] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 156.932417][ T8274] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 157.012635][ T8274] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.019841][ T8274] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.027882][ T8274] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.035267][ T8274] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.114973][ T8274] 8021q: adding VLAN 0 to HW filter on device bond0 [ 157.136509][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 157.146830][ T55] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.158444][ T55] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.168242][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 157.187885][ T8274] 8021q: adding VLAN 0 to HW filter on device team0 [ 157.207506][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 157.216473][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.223653][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.245644][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 157.255281][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 157.264414][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.271670][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.287950][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 157.303570][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 157.326308][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 157.335740][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 157.345832][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 157.356121][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 157.366985][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 157.390206][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 157.399051][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 157.420801][ T8274] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 157.432665][ T8274] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 157.444986][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 157.454010][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 157.486011][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 157.493482][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 157.516087][ T8274] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 157.550760][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 157.560269][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 157.596939][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 157.605953][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 157.624743][ T8274] device veth0_vlan entered promiscuous mode [ 157.637442][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready executing program [ 157.645956][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 157.666183][ T8274] device veth1_vlan entered promiscuous mode [ 157.708004][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 157.717599][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 157.727260][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 157.736734][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 157.752604][ T8274] device veth0_macvtap entered promiscuous mode [ 157.767069][ T8274] device veth1_macvtap entered promiscuous mode [ 157.799010][ T8274] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 157.806682][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 157.816221][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 157.825478][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 157.834923][ T55] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 157.852750][ T8274] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 157.860457][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 157.870360][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 157.887175][ T8274] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.899649][ T8274] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.908642][ T8274] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.917652][ T8274] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 157.932713][ T7] Bluetooth: hci0: command 0x0409 tx timeout [ 158.198268][ T1590] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.206517][ T1590] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.216574][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 158.307075][ T1590] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.315275][ T1590] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.323046][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/14 04:08:47 building call list... [ 159.361505][ T178] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.597530][ T178] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.849099][ T178] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.020917][ T178] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 162.765800][ T178] device hsr_slave_0 left promiscuous mode [ 162.779541][ T178] device hsr_slave_1 left promiscuous mode [ 162.788484][ T178] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 162.796542][ T178] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 162.817246][ T178] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 162.825045][ T178] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 162.837298][ T178] device bridge_slave_1 left promiscuous mode [ 162.844054][ T178] bridge0: port 2(bridge_slave_1) entered disabled state [ 162.861426][ T178] device bridge_slave_0 left promiscuous mode [ 162.868596][ T178] bridge0: port 1(bridge_slave_0) entered disabled state [ 162.888805][ T178] device veth1_macvtap left promiscuous mode [ 162.895387][ T178] device veth0_macvtap left promiscuous mode [ 162.901527][ T178] device veth1_vlan left promiscuous mode [ 162.907595][ T178] device veth0_vlan left promiscuous mode executing program executing program [ 166.664877][ T178] team0 (unregistering): Port device team_slave_1 removed [ 166.687188][ T178] team0 (unregistering): Port device team_slave_0 removed [ 166.705627][ T178] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 166.732373][ T178] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 166.847675][ T178] bond0 (unregistering): Released all slaves [ 167.858659][ T178] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 167.866587][ T178] #PF: supervisor read access in kernel mode [ 167.872636][ T178] #PF: error_code(0x0000) - not-present page [ 167.878670][ T178] PGD 0 P4D 0 [ 167.882211][ T178] Oops: 0000 [#1] SMP [ 167.886287][ T178] CPU: 1 PID: 178 Comm: kworker/u4:4 Not tainted 5.10.0-rc1-syzkaller #0 [ 167.894781][ T178] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 167.904942][ T178] Workqueue: netns cleanup_net [ 167.909841][ T178] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 167.915326][ T178] 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 [ 167.935050][ T178] RSP: 0018:ffff888102dbfa38 EFLAGS: 00010246 [ 167.941234][ T178] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888102da9ec0 [ 167.949466][ T178] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88812574d800 [ 167.957532][ T178] RBP: ffff888102dbfac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 167.965584][ T178] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 167.973643][ T178] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888102daa8c0 [ 167.981712][ T178] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 167.990726][ T178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 167.997652][ T178] CR2: 000000000000009c CR3: 0000000112b06000 CR4: 00000000001506e0 [ 168.005710][ T178] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.013763][ T178] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.021798][ T178] Call Trace: [ 168.025208][ T178] ? up_write+0x62/0x220 [ 168.029560][ T178] afs_cell_purge+0xfb/0x5e0 [ 168.034266][ T178] ? del_timer_sync+0x131/0x1f0 [ 168.039240][ T178] ? afs_fs_probe_cleanup+0x111/0x140 [ 168.044723][ T178] afs_net_exit+0xc6/0x180 [ 168.049246][ T178] ? afs_net_init+0xe90/0xe90 [ 168.054015][ T178] cleanup_net+0xd73/0x1af0 [ 168.058622][ T178] ? ops_init+0x7d0/0x7d0 [ 168.063053][ T178] process_one_work+0x121c/0x1fc0 [ 168.068217][ T178] worker_thread+0x10cc/0x2740 [ 168.073085][ T178] ? kmsan_get_metadata+0x116/0x180 [ 168.078425][ T178] kthread+0x51c/0x560 [ 168.082598][ T178] ? process_one_work+0x1fc0/0x1fc0 [ 168.087920][ T178] ? kthread_blkcg+0x110/0x110 [ 168.092787][ T178] ret_from_fork+0x1f/0x30 [ 168.097269][ T178] Modules linked in: [ 168.101252][ T178] CR2: 000000000000009c [ 168.105499][ T178] ---[ end trace c85671d053177412 ]--- [ 168.111058][ T178] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.116536][ T178] 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 [ 168.136236][ T178] RSP: 0018:ffff888102dbfa38 EFLAGS: 00010246 [ 168.142416][ T178] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888102da9ec0 [ 168.150471][ T178] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88812574d800 [ 168.158620][ T178] RBP: ffff888102dbfac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.166674][ T178] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.174728][ T178] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888102daa8c0 [ 168.182795][ T178] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 168.191806][ T178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.198469][ T178] CR2: 000000000000009c CR3: 0000000112b06000 CR4: 00000000001506e0 [ 168.206523][ T178] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.214581][ T178] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.222648][ T178] Kernel panic - not syncing: Fatal exception [ 168.229337][ T178] Kernel Offset: disabled [ 168.233732][ T178] Rebooting in 86400 seconds..