[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. 2020/11/13 15:51:48 fuzzer started 2020/11/13 15:51:49 connecting to host at 10.128.0.26:46001 2020/11/13 15:51:49 checking machine... 2020/11/13 15:51:49 checking revisions... 2020/11/13 15:51:49 testing simple program... executing program executing program syzkaller login: [ 156.732037][ T8259] IPVS: ftp: loaded support on port[0] = 21 [ 157.063144][ T8259] chnl_net:caif_netlink_parms(): no params data found [ 157.238280][ T8259] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.245597][ T8259] bridge0: port 1(bridge_slave_0) entered disabled state [ 157.255255][ T8259] device bridge_slave_0 entered promiscuous mode [ 157.266575][ T8259] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.273792][ T8259] bridge0: port 2(bridge_slave_1) entered disabled state [ 157.283314][ T8259] device bridge_slave_1 entered promiscuous mode [ 157.316863][ T8259] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 157.329895][ T8259] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 157.366249][ T8259] team0: Port device team_slave_0 added [ 157.376269][ T8259] team0: Port device team_slave_1 added [ 157.408060][ T8259] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 157.415272][ T8259] 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. [ 157.441841][ T8259] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 157.456003][ T8259] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 157.463030][ T8259] 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. [ 157.490306][ T8259] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 157.532636][ T8259] device hsr_slave_0 entered promiscuous mode [ 157.540180][ T8259] device hsr_slave_1 entered promiscuous mode [ 157.719428][ T8259] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 157.731332][ T8259] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 157.754870][ T8259] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 157.771664][ T8259] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 157.868240][ T8259] bridge0: port 2(bridge_slave_1) entered blocking state [ 157.875451][ T8259] bridge0: port 2(bridge_slave_1) entered forwarding state [ 157.882938][ T8259] bridge0: port 1(bridge_slave_0) entered blocking state [ 157.890411][ T8259] bridge0: port 1(bridge_slave_0) entered forwarding state [ 157.971807][ T8259] 8021q: adding VLAN 0 to HW filter on device bond0 [ 157.993424][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 158.004247][ T2977] bridge0: port 1(bridge_slave_0) entered disabled state [ 158.015827][ T2977] bridge0: port 2(bridge_slave_1) entered disabled state [ 158.026354][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 158.047115][ T8259] 8021q: adding VLAN 0 to HW filter on device team0 [ 158.061770][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 158.070988][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 158.080952][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 158.088370][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 158.117163][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 158.126821][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 158.136501][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 158.143753][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 158.152850][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 158.162902][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 158.187933][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 158.198288][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 158.226431][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 158.235579][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 158.244921][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 158.255768][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 158.264624][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 158.274160][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 158.283725][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 158.301143][ T8259] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 158.333545][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 158.341532][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 158.363377][ T8259] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 158.400364][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 158.409880][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 158.447980][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 158.456900][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 158.476066][ T8259] device veth0_vlan entered promiscuous mode [ 158.487863][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 158.496782][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 158.518039][ T8259] device veth1_vlan entered promiscuous mode executing program [ 158.559950][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 158.569080][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 158.578606][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 158.588139][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 158.604375][ T8259] device veth0_macvtap entered promiscuous mode [ 158.622624][ T8259] device veth1_macvtap entered promiscuous mode [ 158.657279][ T8259] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 158.664923][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 158.674769][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 158.683899][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 158.694219][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 158.714318][ T8259] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 158.722054][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 158.732416][ T2977] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 158.748842][ T8259] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.759001][ T8259] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.768049][ T8259] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.777030][ T8259] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 158.791427][ T2977] Bluetooth: hci0: command 0x0409 tx timeout [ 159.053881][ T21] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 159.061990][ T21] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 159.072072][ T8480] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 159.171402][ T21] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 159.179569][ T21] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 159.188049][ T54] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2020/11/13 15:51:59 building call list... [ 160.243910][ T21] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.452461][ T21] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.611381][ T21] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 160.761167][ T21] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 163.529406][ T21] device hsr_slave_0 left promiscuous mode [ 163.540102][ T21] device hsr_slave_1 left promiscuous mode [ 163.550972][ T21] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 163.558639][ T21] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 163.571429][ T21] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 163.579731][ T21] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 163.593727][ T21] device bridge_slave_1 left promiscuous mode [ 163.600765][ T21] bridge0: port 2(bridge_slave_1) entered disabled state [ 163.614968][ T21] device bridge_slave_0 left promiscuous mode [ 163.621953][ T21] bridge0: port 1(bridge_slave_0) entered disabled state [ 163.648338][ T21] device veth1_macvtap left promiscuous mode [ 163.654596][ T21] device veth0_macvtap left promiscuous mode [ 163.661009][ T21] device veth1_vlan left promiscuous mode [ 163.667300][ T21] device veth0_vlan left promiscuous mode executing program [ 167.466125][ T21] team0 (unregistering): Port device team_slave_1 removed [ 167.488607][ T21] team0 (unregistering): Port device team_slave_0 removed [ 167.512890][ T21] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 167.535543][ T21] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface executing program [ 167.641548][ T21] bond0 (unregistering): Released all slaves [ 168.591649][ T21] BUG: kernel NULL pointer dereference, address: 000000000000009c [ 168.600872][ T21] #PF: supervisor read access in kernel mode [ 168.606919][ T21] #PF: error_code(0x0000) - not-present page [ 168.612971][ T21] PGD 0 P4D 0 [ 168.616490][ T21] Oops: 0000 [#1] SMP [ 168.620659][ T21] CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.10.0-rc1-syzkaller #0 [ 168.629334][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 168.639510][ T21] Workqueue: netns cleanup_net [ 168.644434][ T21] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.649932][ T21] 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 [ 168.669648][ T21] RSP: 0018:ffff888102c9fa38 EFLAGS: 00010246 [ 168.675833][ T21] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888102c1dc40 [ 168.683888][ T21] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881255a0800 [ 168.691953][ T21] RBP: ffff888102c9fac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.700012][ T21] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.708091][ T21] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888102c1e640 [ 168.716165][ T21] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 168.725182][ T21] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.731872][ T21] CR2: 000000000000009c CR3: 0000000112ac5000 CR4: 00000000001506f0 [ 168.739930][ T21] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.748006][ T21] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.756047][ T21] Call Trace: [ 168.759476][ T21] ? up_write+0x62/0x220 [ 168.763826][ T21] afs_cell_purge+0xfb/0x5e0 [ 168.768532][ T21] ? del_timer_sync+0x131/0x1f0 [ 168.773525][ T21] ? afs_fs_probe_cleanup+0x111/0x140 [ 168.779005][ T21] afs_net_exit+0xc6/0x180 [ 168.783532][ T21] ? afs_net_init+0xe90/0xe90 [ 168.788303][ T21] cleanup_net+0xd73/0x1af0 [ 168.792910][ T21] ? ops_init+0x7d0/0x7d0 [ 168.797347][ T21] process_one_work+0x121c/0x1fc0 [ 168.802505][ T21] worker_thread+0x10cc/0x2740 [ 168.807481][ T21] ? kmsan_get_metadata+0x116/0x180 [ 168.812840][ T21] kthread+0x51c/0x560 [ 168.817768][ T21] ? process_one_work+0x1fc0/0x1fc0 [ 168.823102][ T21] ? kthread_blkcg+0x110/0x110 [ 168.827976][ T21] ret_from_fork+0x1f/0x30 [ 168.832471][ T21] Modules linked in: [ 168.836460][ T21] CR2: 000000000000009c [ 168.840713][ T21] ---[ end trace ce70e2fe313b4f87 ]--- [ 168.846281][ T21] RIP: 0010:afs_unuse_cell+0x67/0x780 [ 168.851768][ T21] 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 [ 168.871469][ T21] RSP: 0018:ffff888102c9fa38 EFLAGS: 00010246 [ 168.877709][ T21] RAX: ffffffff843e3717 RBX: 000000000000009c RCX: ffff888102c1dc40 [ 168.885768][ T21] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881255a0800 [ 168.894479][ T21] RBP: ffff888102c9fac0 R08: ffffea000000000f R09: ffff88813fffa000 [ 168.902548][ T21] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 [ 168.910608][ T21] R13: 0000000000000000 R14: 0000000000000000 R15: ffff888102c1e640 [ 168.918680][ T21] FS: 0000000000000000(0000) GS:ffff88813fc00000(0000) knlGS:0000000000000000 [ 168.927701][ T21] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 168.934368][ T21] CR2: 000000000000009c CR3: 0000000112ac5000 CR4: 00000000001506f0 [ 168.942428][ T21] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 168.950486][ T21] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 168.958544][ T21] Kernel panic - not syncing: Fatal exception [ 168.965565][ T21] Kernel Offset: disabled [ 168.969994][ T21] Rebooting in 86400 seconds..