[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.0.141' (ECDSA) to the list of known hosts. 2020/11/13 16:05:42 fuzzer started 2020/11/13 16:05:43 connecting to host at 10.128.0.26:40203 2020/11/13 16:05:43 checking machine... 2020/11/13 16:05:43 checking revisions... 2020/11/13 16:05:44 testing simple program... executing program executing program syzkaller login: [ 157.309868][ T8279] IPVS: ftp: loaded support on port[0] = 21 [ 157.639018][ T8279] chnl_net:caif_netlink_parms(): no params data found [ 157.773906][ T8279] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.781507][ T8279] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.791068][ T8279] device bridge_slave_0 entered promiscuous mode [ 157.804387][ T8279] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.811904][ T8279] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.821577][ T8279] device bridge_slave_1 entered promiscuous mode [ 157.864010][ T8279] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 157.880138][ T8279] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 157.912766][ T8279] team0: Port device team_slave_0 added [ 157.922120][ T8279] team0: Port device team_slave_1 added [ 157.952996][ T8279] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 157.960076][ T8279] 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. [ 157.986409][ T8279] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 157.999907][ T8279] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 158.007429][ T8279] 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. [ 158.033622][ T8279] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 158.074775][ T8279] device hsr_slave_0 entered promiscuous mode [ 158.082537][ T8279] device hsr_slave_1 entered promiscuous mode [ 158.260968][ T8279] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 158.272620][ T8279] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 158.288429][ T8279] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 158.305792][ T8279] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 158.403463][ T8279] bridge0: port 2(bridge_slave_1) entered blocking state [ 158.410667][ T8279] bridge0: port 2(bridge_slave_1) entered forwarding state [ 158.418527][ T8279] bridge0: port 1(bridge_slave_0) entered blocking state [ 158.425927][ T8279] bridge0: port 1(bridge_slave_0) entered forwarding state [ 158.502626][ T8279] 8021q: adding VLAN 0 to HW filter on device bond0 [ 158.524600][ T2981] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 158.535226][ T2981] bridge0: port 1(bridge_slave_0) entered disabled state [ 158.548134][ T2981] bridge0: port 2(bridge_slave_1) entered disabled state [ 158.559610][ T2981] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 158.577079][ T8279] 8021q: adding VLAN 0 to HW filter on device team0 [ 158.595283][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 158.604311][ T3483] bridge0: port 1(bridge_slave_0) entered blocking state [ 158.611651][ T3483] bridge0: port 1(bridge_slave_0) entered forwarding state [ 158.626997][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 158.637025][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 158.646338][ T8490] bridge0: port 2(bridge_slave_1) entered blocking state [ 158.653517][ T8490] bridge0: port 2(bridge_slave_1) entered forwarding state [ 158.687549][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 158.697996][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 158.709324][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 158.719351][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 158.729789][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 158.740288][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 158.751385][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 158.777053][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 158.788825][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 158.797671][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 158.807848][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 158.819905][ T8279] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 158.852576][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 158.860681][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 158.881873][ T8279] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 158.916257][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 158.926190][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 158.959314][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 158.968211][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 158.986203][ T8279] device veth0_vlan entered promiscuous mode [ 158.998249][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 159.006967][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 159.027776][ T8279] device veth1_vlan entered promiscuous mode [ 159.070355][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 159.079314][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 159.088932][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 159.098542][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 159.117295][ T8279] device veth0_macvtap entered promiscuous mode [ 159.132250][ T8279] device veth1_macvtap entered promiscuous mode [ 159.164686][ T8279] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 159.172813][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 159.182671][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 159.191716][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 159.201851][ T3483] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready executing program [ 159.221401][ T8279] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 159.229295][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 159.239324][ T8490] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 159.258280][ T8279] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 159.267873][ T8279] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 159.276872][ T8279] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 159.285772][ T8279] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 159.304221][ T3483] Bluetooth: hci0: command 0x0409 tx timeout [ 159.562272][ T8] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 159.570497][ T8] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 159.599514][ T2981] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 159.657982][ T844] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 159.667050][ T844] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 159.678019][ T2981] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/13 16:05:53 building call list... [ 160.702140][ T8] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.949617][ T8] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 161.151563][ T8] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 161.306202][ T8] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 164.127679][ T8] device hsr_slave_0 left promiscuous mode [ 164.145645][ T8] device hsr_slave_1 left promiscuous mode [ 164.168111][ T8] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 164.175694][ T8] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 164.190188][ T8] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 164.197967][ T8] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 164.213890][ T8] device bridge_slave_1 left promiscuous mode [ 164.220870][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 164.239352][ T8] device bridge_slave_0 left promiscuous mode [ 164.246736][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 164.275254][ T8] device veth1_macvtap left promiscuous mode [ 164.281623][ T8] device veth0_macvtap left promiscuous mode [ 164.288075][ T8] device veth1_vlan left promiscuous mode [ 164.294039][ T8] device veth0_vlan left promiscuous mode executing program [ 168.020855][ T8] team0 (unregistering): Port device team_slave_1 removed [ 168.040728][ T8] team0 (unregistering): Port device team_slave_0 removed [ 168.062186][ T8] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 168.088180][ T8] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 168.195338][ T8] bond0 (unregistering): Released all slaves executing program [ 168.848249][ T8] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 168.856364][ T8] #PF: supervisor read access in kernel mode [ 168.862522][ T8] #PF: error_code(0x0000) - not-present page [ 168.868657][ T8] PGD 120dc6067 P4D 120dc6067 PUD 120d49067 PMD 0 [ 168.875477][ T8] Oops: 0000 [#1] SMP [ 168.879655][ T8] CPU: 1 PID: 8 Comm: kworker/u4:0 Not tainted 5.10.0-rc1-syzkaller #0 [ 168.888087][ T8] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 168.898361][ T8] Workqueue: netns cleanup_net [ 168.903369][ T8] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.908966][ T8] 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 [ 168.928796][ T8] RSP: 0018:ffff8881023bba38 EFLAGS: 00010246 [ 168.935102][ T8] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff8881023adc40 [ 168.943286][ T8] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881261f6000 [ 168.951489][ T8] RBP: ffff8881023bbac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.959683][ T8] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.967849][ T8] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881023ae640 [ 168.976026][ T8] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 168.985153][ T8] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.991926][ T8] CR2: 000000000000009c CR3: 0000000120dcf000 CR4: 00000000001506e0 [ 169.000100][ T8] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 169.008262][ T8] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 169.016486][ T8] Call Trace: [ 169.019996][ T8] ? up_write+0x62/0x220 [ 169.024460][ T8] afs_cell_purge+0xfb/0x5e0 [ 169.029275][ T8] ? del_timer_sync+0x131/0x1f0 [ 169.034375][ T8] ? afs_fs_probe_cleanup+0x111/0x140 [ 169.039972][ T8] afs_net_exit+0xc6/0x180 [ 169.044601][ T8] ? afs_net_init+0xe90/0xe90 [ 169.049477][ T8] cleanup_net+0xd73/0x1af0 [ 169.054185][ T8] ? ops_init+0x7d0/0x7d0 [ 169.058731][ T8] process_one_work+0x121c/0x1fc0 [ 169.063993][ T8] worker_thread+0x10cc/0x2740 [ 169.068988][ T8] ? kmsan_get_metadata+0x116/0x180 [ 169.074435][ T8] kthread+0x51c/0x560 [ 169.078712][ T8] ? process_one_work+0x1fc0/0x1fc0 [ 169.084138][ T8] ? kthread_blkcg+0x110/0x110 [ 169.089118][ T8] ret_from_fork+0x1f/0x30 [ 169.093707][ T8] Modules linked in: [ 169.097799][ T8] CR2: 000000000000009c [ 169.102146][ T8] ---[ end trace 8d31d4d4491a0b2f ]--- [ 169.107811][ T8] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 169.113403][ T8] 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 [ 169.133213][ T8] RSP: 0018:ffff8881023bba38 EFLAGS: 00010246 [ 169.139498][ T8] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff8881023adc40 [ 169.147662][ T8] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881261f6000 [ 169.155830][ T8] RBP: ffff8881023bbac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 169.163984][ T8] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 169.172155][ T8] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881023ae640 [ 169.180336][ T8] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 169.189472][ T8] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 169.196242][ T8] CR2: 000000000000009c CR3: 0000000120dcf000 CR4: 00000000001506e0 [ 169.204414][ T8] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 169.212573][ T8] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 169.220723][ T8] Kernel panic - not syncing: Fatal exception [ 169.227669][ T8] Kernel Offset: disabled [ 169.232175][ T8] Rebooting in 86400 seconds..