[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.118' (ECDSA) to the list of known hosts. 2021/04/28 13:51:46 fuzzer started 2021/04/28 13:51:46 connecting to host at 10.128.0.169:34909 2021/04/28 13:51:46 checking machine... 2021/04/28 13:51:46 checking revisions... 2021/04/28 13:51:46 testing simple program... syzkaller login: [ 71.790098][ T8398] chnl_net:caif_netlink_parms(): no params data found [ 71.908460][ T8398] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.917945][ T8398] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.936024][ T8398] device bridge_slave_0 entered promiscuous mode [ 71.947328][ T8398] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.955101][ T8398] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.963683][ T8398] device bridge_slave_1 entered promiscuous mode [ 71.985948][ T8398] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 71.999206][ T8398] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.027636][ T8398] team0: Port device team_slave_0 added [ 72.036904][ T8398] team0: Port device team_slave_1 added [ 72.056273][ T8398] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.065905][ T8398] 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. [ 72.099040][ T8398] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.115070][ T8398] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.122414][ T8398] 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. [ 72.150897][ T8398] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.184734][ T8398] device hsr_slave_0 entered promiscuous mode [ 72.193031][ T8398] device hsr_slave_1 entered promiscuous mode [ 72.323922][ T8398] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 72.336605][ T8398] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 72.354391][ T8398] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 72.364950][ T8398] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.394214][ T8398] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.402038][ T8398] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.409998][ T8398] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.417802][ T8398] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.462982][ T8398] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.478049][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.491095][ T20] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.500874][ T20] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.511936][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 72.527313][ T8398] 8021q: adding VLAN 0 to HW filter on device team0 [ 72.538450][ T4840] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 72.547945][ T4840] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.555331][ T4840] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.567592][ T8617] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 72.576904][ T8617] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.585651][ T8617] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.606993][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 72.616851][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 72.630926][ T8617] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 72.649570][ T8398] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 72.662578][ T8398] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 72.675603][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 72.685608][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 72.695962][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 72.721092][ T8398] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 72.729603][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 72.738293][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 72.762038][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 72.781700][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 72.790627][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 72.804236][ T8398] device veth0_vlan entered promiscuous mode [ 72.814748][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 72.823757][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 72.836507][ T8398] device veth1_vlan entered promiscuous mode [ 72.860307][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 72.870265][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 72.879709][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 72.890753][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 72.902794][ T8398] device veth0_macvtap entered promiscuous mode [ 72.922142][ T8398] device veth1_macvtap entered promiscuous mode [ 72.940117][ T8398] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 72.950459][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 72.960422][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 72.969880][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 72.978792][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 72.991038][ T8398] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.001310][ T3677] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.010671][ T3677] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 73.025348][ T8398] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.035004][ T8398] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.044669][ T8398] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.054304][ T8398] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.144045][ T28] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.158098][ T28] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.185333][ T8619] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 73.207061][ T28] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.217696][ T28] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.229370][ T3677] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/04/28 13:51:49 building call list... [ 73.867698][ T25] ------------[ cut here ]------------ [ 73.876541][ T25] hook not found, pf 3 num 0 [ 73.877182][ T25] WARNING: CPU: 0 PID: 25 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 73.894149][ T25] Modules linked in: [ 73.898294][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-rc7-syzkaller #0 [ 73.908100][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.918407][ T25] Workqueue: netns cleanup_net [ 73.931552][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 73.937947][ T25] Code: 0f b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 11 04 00 00 8b 53 1c 89 ee 48 c7 c7 00 68 6c 8a e8 2e 37 8a 01 <0f> 0b e9 e5 00 00 00 e8 f9 34 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 73.966345][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 73.972803][ T25] RAX: 0000000000000000 RBX: ffff888020b27c00 RCX: 0000000000000000 [ 73.980899][ T25] RDX: ffff8880117d3880 RSI: ffffffff815c5205 RDI: fffff520001bff6a [ 73.989789][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 73.999078][ T25] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff8880280c8f20 [ 74.010662][ T25] R13: 0000000000000000 R14: ffff88801875d000 R15: 0000000000000001 [ 74.019962][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 74.030147][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.037876][ T25] CR2: 000055a4c0b52b40 CR3: 000000001356b000 CR4: 00000000001506f0 [ 74.047111][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.055924][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.064918][ T25] Call Trace: [ 74.068250][ T25] nf_unregister_net_hooks+0x117/0x160 [ 74.075335][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 74.085137][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 74.091046][ T25] cleanup_net+0x451/0xb10 [ 74.097458][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 74.103572][ T25] process_one_work+0x98d/0x1600 [ 74.108574][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 74.115189][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 74.120269][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 74.126166][ T25] worker_thread+0x64c/0x1120 [ 74.131057][ T25] ? process_one_work+0x1600/0x1600 [ 74.137024][ T25] kthread+0x3b1/0x4a0 [ 74.141288][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 74.147212][ T25] ret_from_fork+0x1f/0x30 [ 74.152249][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 74.159261][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-rc7-syzkaller #0 [ 74.167740][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.178339][ T25] Workqueue: netns cleanup_net [ 74.183587][ T25] Call Trace: [ 74.186883][ T25] dump_stack+0x141/0x1d7 [ 74.191500][ T25] panic+0x306/0x73d [ 74.195516][ T25] ? __warn_printk+0xf3/0xf3 [ 74.200529][ T25] ? __warn.cold+0x1a/0x44 [ 74.205289][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 74.211041][ T25] __warn.cold+0x35/0x44 [ 74.215307][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 74.221151][ T25] report_bug+0x1bd/0x210 [ 74.225509][ T25] handle_bug+0x3c/0x60 [ 74.229774][ T25] exc_invalid_op+0x14/0x40 [ 74.234300][ T25] asm_exc_invalid_op+0x12/0x20 [ 74.239263][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 74.245714][ T25] Code: 0f b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 11 04 00 00 8b 53 1c 89 ee 48 c7 c7 00 68 6c 8a e8 2e 37 8a 01 <0f> 0b e9 e5 00 00 00 e8 f9 34 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 74.265631][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 74.272014][ T25] RAX: 0000000000000000 RBX: ffff888020b27c00 RCX: 0000000000000000 [ 74.280273][ T25] RDX: ffff8880117d3880 RSI: ffffffff815c5205 RDI: fffff520001bff6a [ 74.288263][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 74.296510][ T25] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff8880280c8f20 [ 74.304586][ T25] R13: 0000000000000000 R14: ffff88801875d000 R15: 0000000000000001 [ 74.312590][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 74.317951][ T25] ? vprintk_func+0x95/0x1e0 [ 74.322600][ T25] nf_unregister_net_hooks+0x117/0x160 [ 74.328181][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 74.334290][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 74.340035][ T25] cleanup_net+0x451/0xb10 [ 74.344524][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 74.350365][ T25] process_one_work+0x98d/0x1600 [ 74.355507][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 74.360907][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 74.366046][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 74.371106][ T25] worker_thread+0x64c/0x1120 [ 74.376010][ T25] ? process_one_work+0x1600/0x1600 [ 74.381538][ T25] kthread+0x3b1/0x4a0 [ 74.385817][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 74.391260][ T25] ret_from_fork+0x1f/0x30 [ 74.397992][ T25] Kernel Offset: disabled [ 74.402781][ T25] Rebooting in 86400 seconds..