[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.1.8' (ECDSA) to the list of known hosts. 2020/11/12 23:47:37 fuzzer started 2020/11/12 23:47:38 connecting to host at 10.128.0.26:37347 2020/11/12 23:47:38 checking machine... 2020/11/12 23:47:38 checking revisions... 2020/11/12 23:47:38 testing simple program... executing program executing program syzkaller login: [ 163.149382][ T8280] IPVS: ftp: loaded support on port[0] = 21 [ 163.581111][ T8280] chnl_net:caif_netlink_parms(): no params data found [ 163.709376][ T8280] bridge0: port 1(bridge_slave_0) entered blocking state [ 163.716970][ T8280] bridge0: port 1(bridge_slave_0) entered disabled state [ 163.726564][ T8280] device bridge_slave_0 entered promiscuous mode [ 163.739685][ T8280] bridge0: port 2(bridge_slave_1) entered blocking state [ 163.747301][ T8280] bridge0: port 2(bridge_slave_1) entered disabled state [ 163.756904][ T8280] device bridge_slave_1 entered promiscuous mode [ 163.793559][ T8280] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 163.807124][ T8280] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 163.846135][ T8280] team0: Port device team_slave_0 added [ 163.856581][ T8280] team0: Port device team_slave_1 added [ 163.891707][ T8280] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 163.899833][ T8280] 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. [ 163.927215][ T8280] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 163.940855][ T8280] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 163.948683][ T8280] 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. [ 163.975059][ T8280] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 164.020255][ T8280] device hsr_slave_0 entered promiscuous mode [ 164.028466][ T8280] device hsr_slave_1 entered promiscuous mode [ 164.220633][ T8280] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 164.234992][ T8280] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 164.252203][ T8280] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 164.270640][ T8280] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 164.370881][ T8280] bridge0: port 2(bridge_slave_1) entered blocking state [ 164.378422][ T8280] bridge0: port 2(bridge_slave_1) entered forwarding state [ 164.386401][ T8280] bridge0: port 1(bridge_slave_0) entered blocking state [ 164.394414][ T8280] bridge0: port 1(bridge_slave_0) entered forwarding state [ 164.489643][ T8280] 8021q: adding VLAN 0 to HW filter on device bond0 [ 164.516540][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 164.528661][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 164.540843][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 164.552852][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 164.576556][ T8280] 8021q: adding VLAN 0 to HW filter on device team0 [ 164.591187][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 164.601655][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 164.610846][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 164.618563][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 164.644244][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 164.654447][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 164.664641][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 164.672240][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 164.681493][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 164.703138][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 164.724152][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 164.733966][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 164.753117][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 164.770525][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 164.781992][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 164.809516][ T8280] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 164.820604][ T8280] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 164.837539][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 164.847793][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 164.857904][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 164.868515][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 164.884249][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 164.918501][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 164.926550][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 164.950473][ T8280] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 164.989512][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 165.000155][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 165.039490][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 165.048868][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 165.068263][ T8280] device veth0_vlan entered promiscuous mode [ 165.076902][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 165.087591][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 165.111098][ T8280] device veth1_vlan entered promiscuous mode [ 165.142589][ T7] Bluetooth: hci0: command 0x0409 tx timeout [ 165.169856][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 165.179963][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 165.190092][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 165.199988][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 165.219069][ T8280] device veth0_macvtap entered promiscuous mode [ 165.237372][ T8280] device veth1_macvtap entered promiscuous mode [ 165.273762][ T8280] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 165.282191][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 165.291240][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 165.301054][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 165.310853][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 165.330252][ T8280] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 165.340192][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 165.351282][ T52] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 165.368130][ T8280] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 165.377800][ T8280] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 165.386896][ T8280] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 165.396341][ T8280] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 165.636470][ T180] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 165.644595][ T180] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 165.652745][ T8492] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 165.793912][ T1139] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 165.802576][ T1139] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 165.810985][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/12 23:47:48 building call list... [ 166.878118][ T1387] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 167.114903][ T1387] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 167.315166][ T1387] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 167.481323][ T1387] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 170.394080][ T1387] device hsr_slave_0 left promiscuous mode [ 170.415000][ T1387] device hsr_slave_1 left promiscuous mode [ 170.427576][ T1387] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 170.438818][ T1387] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 170.457325][ T1387] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 170.465294][ T1387] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 170.488052][ T1387] device bridge_slave_1 left promiscuous mode [ 170.495472][ T1387] bridge0: port 2(bridge_slave_1) entered disabled state [ 170.508405][ T1387] device bridge_slave_0 left promiscuous mode [ 170.515535][ T1387] bridge0: port 1(bridge_slave_0) entered disabled state [ 170.543711][ T1387] device veth1_macvtap left promiscuous mode [ 170.549937][ T1387] device veth0_macvtap left promiscuous mode [ 170.557111][ T1387] device veth1_vlan left promiscuous mode [ 170.563519][ T1387] device veth0_vlan left promiscuous mode executing program executing program [ 174.688410][ T1387] team0 (unregistering): Port device team_slave_1 removed [ 174.711161][ T1387] team0 (unregistering): Port device team_slave_0 removed [ 174.733300][ T1387] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 174.757700][ T1387] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 174.871073][ T1387] bond0 (unregistering): Released all slaves [ 175.406370][ T1387] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 175.414323][ T1387] #PF: supervisor read access in kernel mode [ 175.420600][ T1387] #PF: error_code(0x0000) - not-present page [ 175.426827][ T1387] PGD 120f80067 P4D 120f80067 PUD 119530067 PMD 0 [ 175.433591][ T1387] Oops: 0000 [#1] SMP [ 175.437827][ T1387] CPU: 0 PID: 1387 Comm: kworker/u4:16 Not tainted 5.10.0-rc1-syzkaller #0 [ 175.446809][ T1387] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 175.457228][ T1387] Workqueue: netns cleanup_net [ 175.462204][ T1387] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 175.467721][ T1387] 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 [ 175.487489][ T1387] RSP: 0018:ffff888104453a38 EFLAGS: 00010246 [ 175.493728][ T1387] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105f85c40 [ 175.501850][ T1387] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888126f2bc00 [ 175.510157][ T1387] RBP: ffff888104453ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 175.518253][ T1387] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 175.526357][ T1387] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105f86640 [ 175.534453][ T1387] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 175.543759][ T1387] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 175.550718][ T1387] CR2: 000000000000009c CR3: 0000000126eca000 CR4: 00000000001506f0 [ 175.559749][ T1387] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 175.568610][ T1387] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 175.576693][ T1387] Call Trace: [ 175.580138][ T1387] ? up_write+0x62/0x220 [ 175.584606][ T1387] afs_cell_purge+0xfb/0x5e0 [ 175.589271][ T1387] ? del_timer_sync+0x131/0x1f0 [ 175.594196][ T1387] ? afs_fs_probe_cleanup+0x111/0x140 [ 175.599638][ T1387] afs_net_exit+0xc6/0x180 [ 175.604161][ T1387] ? afs_net_init+0xe90/0xe90 [ 175.609041][ T1387] cleanup_net+0xd73/0x1af0 [ 175.613946][ T1387] ? ops_init+0x7d0/0x7d0 [ 175.618523][ T1387] process_one_work+0x121c/0x1fc0 [ 175.623915][ T1387] worker_thread+0x10cc/0x2740 [ 175.629148][ T1387] ? kmsan_get_metadata+0x116/0x180 [ 175.634411][ T1387] ? kmsan_get_metadata+0x116/0x180 [ 175.639707][ T1387] kthread+0x51c/0x560 [ 175.644042][ T1387] ? process_one_work+0x1fc0/0x1fc0 [ 175.649711][ T1387] ? kthread_blkcg+0x110/0x110 [ 175.654544][ T1387] ret_from_fork+0x1f/0x30 [ 175.659277][ T1387] Modules linked in: [ 175.663236][ T1387] CR2: 000000000000009c [ 175.668020][ T1387] ---[ end trace cdb82cd71bedceed ]--- [ 175.674592][ T1387] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 175.686705][ T1387] 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 [ 175.709327][ T1387] RSP: 0018:ffff888104453a38 EFLAGS: 00010246 [ 175.715485][ T1387] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888105f85c40 [ 175.725631][ T1387] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888126f2bc00 [ 175.734675][ T1387] RBP: ffff888104453ac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 175.743782][ T1387] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 175.752282][ T1387] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888105f86640 [ 175.760552][ T1387] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 175.769983][ T1387] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 175.777173][ T1387] CR2: 000000000000009c CR3: 0000000126eca000 CR4: 00000000001506f0 [ 175.785338][ T1387] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 175.793654][ T1387] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 175.802078][ T1387] Kernel panic - not syncing: Fatal exception [ 175.809111][ T1387] Kernel Offset: disabled [ 175.813503][ T1387] Rebooting in 86400 seconds..