[ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Started System Logging Service. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts. 2020/11/12 12:08:16 fuzzer started 2020/11/12 12:08:17 connecting to host at 10.128.0.26:39067 2020/11/12 12:08:17 checking machine... 2020/11/12 12:08:17 checking revisions... 2020/11/12 12:08:17 testing simple program... executing program executing program syzkaller login: [ 156.257446][ T8278] IPVS: ftp: loaded support on port[0] = 21 [ 156.674623][ T8278] chnl_net:caif_netlink_parms(): no params data found [ 156.776703][ T8278] bridge0: port 1(bridge_slave_0) entered blocking state [ 156.784270][ T8278] bridge0: port 1(bridge_slave_0) entered disabled state [ 156.792741][ T8278] device bridge_slave_0 entered promiscuous mode [ 156.805702][ T8278] bridge0: port 2(bridge_slave_1) entered blocking state [ 156.812990][ T8278] bridge0: port 2(bridge_slave_1) entered disabled state [ 156.822623][ T8278] device bridge_slave_1 entered promiscuous mode [ 156.856589][ T8278] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 156.869793][ T8278] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 156.906567][ T8278] team0: Port device team_slave_0 added [ 156.918174][ T8278] team0: Port device team_slave_1 added [ 156.950726][ T8278] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 156.957869][ T8278] 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. [ 156.984062][ T8278] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 156.997385][ T8278] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 157.004607][ T8278] 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. [ 157.030836][ T8278] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 157.074902][ T8278] device hsr_slave_0 entered promiscuous mode [ 157.082503][ T8278] device hsr_slave_1 entered promiscuous mode [ 157.266922][ T8278] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 157.279200][ T8278] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 157.302232][ T8278] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 157.319936][ T8278] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 157.409957][ T8278] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.417933][ T8278] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.425788][ T8278] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.432992][ T8278] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.514870][ T8278] 8021q: adding VLAN 0 to HW filter on device bond0 [ 157.538307][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 157.548783][ T2979] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.561738][ T2979] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.574131][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 157.593273][ T8278] 8021q: adding VLAN 0 to HW filter on device team0 [ 157.612572][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 157.621808][ T4745] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.629247][ T4745] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.645423][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 157.654802][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 157.664229][ T8497] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.671560][ T8497] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.697387][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 157.708229][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 157.725358][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 157.734980][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 157.764756][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 157.774286][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 157.784874][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 157.795049][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 157.804637][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 157.818522][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 157.827904][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 157.846156][ T8278] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 157.876512][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 157.884812][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 157.909085][ T8278] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 157.945974][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 157.955667][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 157.990812][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 158.000686][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 158.011599][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 158.022061][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 158.039863][ T8278] device veth0_vlan entered promiscuous mode [ 158.059982][ T8278] device veth1_vlan entered promiscuous mode [ 158.101661][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 158.110553][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 158.120153][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 158.130419][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 158.150288][ T8278] device veth0_macvtap entered promiscuous mode [ 158.167465][ T8278] device veth1_macvtap entered promiscuous mode [ 158.201637][ T8278] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 158.209487][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 158.218968][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 158.227992][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 158.237995][ T4745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 158.254570][ T4745] Bluetooth: hci0: command 0x0409 tx timeout [ 158.261992][ T8278] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 158.269990][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 158.280469][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 158.297224][ T8278] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.306422][ T8278] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.315630][ T8278] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.324627][ T8278] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.600254][ T471] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.608556][ T471] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.619180][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 158.694726][ T471] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 158.702659][ T471] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 158.711324][ T8497] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/12 12:08:27 building call list... [ 159.553099][ T460] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.786639][ T460] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 159.937005][ T460] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.085735][ T460] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 163.525992][ T460] device hsr_slave_0 left promiscuous mode [ 163.556856][ T460] device hsr_slave_1 left promiscuous mode [ 163.574656][ T460] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 163.582157][ T460] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 163.597876][ T460] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 163.605783][ T460] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 163.637991][ T460] device bridge_slave_1 left promiscuous mode [ 163.645178][ T460] bridge0: port 2(bridge_slave_1) entered disabled state [ 163.662530][ T460] device bridge_slave_0 left promiscuous mode [ 163.669733][ T460] bridge0: port 1(bridge_slave_0) entered disabled state [ 163.692733][ T460] device veth1_macvtap left promiscuous mode [ 163.699532][ T460] device veth0_macvtap left promiscuous mode [ 163.705970][ T460] device veth1_vlan left promiscuous mode [ 163.711845][ T460] device veth0_vlan left promiscuous mode executing program executing program [ 167.434819][ T460] team0 (unregistering): Port device team_slave_1 removed [ 167.462492][ T460] team0 (unregistering): Port device team_slave_0 removed [ 167.485446][ T460] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 167.510980][ T460] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 167.616829][ T460] bond0 (unregistering): Released all slaves [ 168.525409][ T460] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 168.533363][ T460] #PF: supervisor read access in kernel mode [ 168.539415][ T460] #PF: error_code(0x0000) - not-present page [ 168.545458][ T460] PGD 126106067 P4D 126106067 PUD 124957067 PMD 0 [ 168.552190][ T460] Oops: 0000 [#1] SMP [ 168.556281][ T460] CPU: 1 PID: 460 Comm: kworker/u4:11 Not tainted 5.10.0-rc1-syzkaller #0 [ 168.564859][ T460] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 168.575077][ T460] Workqueue: netns cleanup_net [ 168.579986][ T460] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.585477][ T460] 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 [ 168.605273][ T460] RSP: 0018:ffff88810475ba38 EFLAGS: 00010246 [ 168.611458][ T460] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff88810524bd80 [ 168.620050][ T460] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88812623b000 [ 168.628122][ T460] RBP: ffff88810475bac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.636188][ T460] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.644259][ T460] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810524c780 [ 168.652339][ T460] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 168.661391][ T460] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.668068][ T460] CR2: 000000000000009c CR3: 0000000124bbe000 CR4: 00000000001506e0 [ 168.676131][ T460] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.684197][ T460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.692322][ T460] Call Trace: [ 168.695752][ T460] ? up_write+0x62/0x220 [ 168.700121][ T460] afs_cell_purge+0xfb/0x5e0 [ 168.704830][ T460] ? del_timer_sync+0x131/0x1f0 [ 168.709829][ T460] ? afs_fs_probe_cleanup+0x111/0x140 [ 168.715336][ T460] afs_net_exit+0xc6/0x180 [ 168.719873][ T460] ? afs_net_init+0xe90/0xe90 [ 168.724661][ T460] cleanup_net+0xd73/0x1af0 [ 168.729286][ T460] ? ops_init+0x7d0/0x7d0 [ 168.733727][ T460] process_one_work+0x121c/0x1fc0 [ 168.738908][ T460] worker_thread+0x10cc/0x2740 [ 168.743844][ T460] ? kmsan_get_metadata+0x116/0x180 [ 168.749148][ T460] ? kmsan_get_metadata+0x116/0x180 [ 168.754482][ T460] kthread+0x51c/0x560 [ 168.758661][ T460] ? process_one_work+0x1fc0/0x1fc0 [ 168.763991][ T460] ? kthread_blkcg+0x110/0x110 [ 168.768865][ T460] ret_from_fork+0x1f/0x30 [ 168.773357][ T460] Modules linked in: [ 168.777350][ T460] CR2: 000000000000009c [ 168.781600][ T460] ---[ end trace 071e2cf853e35b35 ]--- [ 168.787171][ T460] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.792833][ T460] 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 [ 168.813324][ T460] RSP: 0018:ffff88810475ba38 EFLAGS: 00010246 [ 168.819508][ T460] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff88810524bd80 [ 168.827576][ T460] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88812623b000 [ 168.835650][ T460] RBP: ffff88810475bac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.843711][ T460] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.851794][ T460] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810524c780 [ 168.859899][ T460] FS: 0000000000000000(0000) GS:ffff88813fd00000(0000) knlGS:0000000000000000 [ 168.868936][ T460] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.875611][ T460] CR2: 000000000000009c CR3: 0000000124bbe000 CR4: 00000000001506e0 [ 168.883679][ T460] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.891748][ T460] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.899838][ T460] Kernel panic - not syncing: Fatal exception [ 168.906748][ T460] Kernel Offset: disabled [ 168.911241][ T460] Rebooting in 86400 seconds..