[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.94' (ECDSA) to the list of known hosts. 2021/04/28 21:02:17 fuzzer started 2021/04/28 21:02:18 connecting to host at 10.128.0.169:37681 2021/04/28 21:02:18 checking machine... 2021/04/28 21:02:18 checking revisions... 2021/04/28 21:02:18 testing simple program... syzkaller login: [ 69.501157][ T8420] chnl_net:caif_netlink_parms(): no params data found [ 69.555596][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.563681][ T8420] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.573750][ T8420] device bridge_slave_0 entered promiscuous mode [ 69.584994][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.593194][ T8420] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.602151][ T8420] device bridge_slave_1 entered promiscuous mode [ 69.622883][ T8420] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 69.633865][ T8420] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 69.657769][ T8420] team0: Port device team_slave_0 added [ 69.665613][ T8420] team0: Port device team_slave_1 added [ 69.684614][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 69.691890][ T8420] 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. [ 69.718241][ T8420] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 69.732284][ T8420] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 69.739887][ T8420] 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. [ 69.766728][ T8420] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 69.794713][ T8420] device hsr_slave_0 entered promiscuous mode [ 69.801575][ T8420] device hsr_slave_1 entered promiscuous mode [ 69.909976][ T8420] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 69.921797][ T8420] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 69.931747][ T8420] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 69.941736][ T8420] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 69.966825][ T8420] bridge0: port 2(bridge_slave_1) entered blocking state [ 69.974072][ T8420] bridge0: port 2(bridge_slave_1) entered forwarding state [ 69.982245][ T8420] bridge0: port 1(bridge_slave_0) entered blocking state [ 69.989446][ T8420] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.035728][ T8420] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.051590][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.062811][ T8641] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.072628][ T8641] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.081670][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 70.095356][ T8420] 8021q: adding VLAN 0 to HW filter on device team0 [ 70.109106][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 70.119003][ T8641] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.126381][ T8641] bridge0: port 1(bridge_slave_0) entered forwarding state [ 70.139634][ T2934] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 70.148688][ T2934] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.155790][ T2934] bridge0: port 2(bridge_slave_1) entered forwarding state [ 70.179061][ T2934] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 70.187985][ T2934] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 70.201158][ T2934] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 70.209603][ T2934] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 70.225943][ T8420] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 70.242708][ T8420] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 70.252812][ T2934] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 70.275305][ T8420] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 70.285693][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 70.294006][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 70.319949][ T2934] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 70.334438][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 70.345031][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 70.353359][ T8641] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 70.368281][ T8420] device veth0_vlan entered promiscuous mode [ 70.381420][ T8420] device veth1_vlan entered promiscuous mode [ 70.404141][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 70.412368][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 70.421471][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 70.433923][ T8420] device veth0_macvtap entered promiscuous mode [ 70.444643][ T8420] device veth1_macvtap entered promiscuous mode [ 70.463639][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 70.472140][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 70.483243][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 70.496822][ T8420] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 70.504875][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 70.514230][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 70.528484][ T8420] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 70.538851][ T8420] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 70.548378][ T8420] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 70.557416][ T8420] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 70.652357][ T104] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.671674][ T104] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.700120][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 70.716149][ T104] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.725457][ T104] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.735147][ T8642] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/04/28 21:02:21 building call list... [ 71.360474][ T3095] ------------[ cut here ]------------ [ 71.370981][ T3095] hook not found, pf 3 num 0 [ 71.371644][ T3095] WARNING: CPU: 1 PID: 3095 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 71.388871][ T3095] Modules linked in: [ 71.392899][ T3095] CPU: 1 PID: 3095 Comm: kworker/u4:5 Not tainted 5.12.0-rc7-syzkaller #0 [ 71.404052][ T3095] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.418072][ T3095] Workqueue: netns cleanup_net [ 71.423044][ T3095] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 71.431596][ T3095] 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 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 71.453434][ T3095] RSP: 0018:ffffc900026cfbc0 EFLAGS: 00010286 [ 71.460754][ T3095] RAX: 0000000000000000 RBX: ffff888021656b00 RCX: 0000000000000000 [ 71.470900][ T3095] RDX: ffff88801b70b880 RSI: ffffffff815c5205 RDI: fffff520004d9f6a [ 71.480202][ T3095] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 71.491325][ T3095] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff88801c4e0f20 [ 71.503414][ T3095] R13: 0000000000000000 R14: ffff888018cfc700 R15: 0000000000000001 [ 71.512838][ T3095] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 71.522978][ T3095] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.531074][ T3095] CR2: 00007f0c15be7000 CR3: 0000000014056000 CR4: 00000000001506e0 [ 71.540253][ T3095] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.549635][ T3095] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.559321][ T3095] Call Trace: [ 71.562718][ T3095] nf_unregister_net_hooks+0x117/0x160 [ 71.575312][ T3095] arpt_unregister_table_pre_exit+0x67/0x80 [ 71.582710][ T3095] ? arptable_filter_net_exit+0x20/0x20 [ 71.589457][ T3095] cleanup_net+0x451/0xb10 [ 71.593992][ T3095] ? ops_free_list.part.0+0x3d0/0x3d0 [ 71.602186][ T3095] process_one_work+0x98d/0x1600 [ 71.608220][ T3095] ? pwq_dec_nr_in_flight+0x320/0x320 [ 71.613639][ T3095] ? rwlock_bug.part.0+0x90/0x90 [ 71.620088][ T3095] ? _raw_spin_lock_irq+0x41/0x50 [ 71.625370][ T3095] worker_thread+0x64c/0x1120 [ 71.632306][ T3095] ? __kthread_parkme+0x13f/0x1e0 [ 71.638737][ T3095] ? process_one_work+0x1600/0x1600 [ 71.644342][ T3095] kthread+0x3b1/0x4a0 [ 71.653991][ T3095] ? __kthread_bind_mask+0xc0/0xc0 [ 71.660875][ T3095] ret_from_fork+0x1f/0x30 [ 71.665450][ T3095] Kernel panic - not syncing: panic_on_warn set ... [ 71.672053][ T3095] CPU: 1 PID: 3095 Comm: kworker/u4:5 Not tainted 5.12.0-rc7-syzkaller #0 [ 71.680593][ T3095] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.690891][ T3095] Workqueue: netns cleanup_net [ 71.696033][ T3095] Call Trace: [ 71.699337][ T3095] dump_stack+0x141/0x1d7 [ 71.703815][ T3095] panic+0x306/0x73d [ 71.707739][ T3095] ? __warn_printk+0xf3/0xf3 [ 71.712370][ T3095] ? __warn.cold+0x1a/0x44 [ 71.716817][ T3095] ? __nf_unregister_net_hook+0x1eb/0x610 [ 71.722616][ T3095] __warn.cold+0x35/0x44 [ 71.726882][ T3095] ? __nf_unregister_net_hook+0x1eb/0x610 [ 71.732639][ T3095] report_bug+0x1bd/0x210 [ 71.737009][ T3095] handle_bug+0x3c/0x60 [ 71.741191][ T3095] exc_invalid_op+0x14/0x40 [ 71.745695][ T3095] asm_exc_invalid_op+0x12/0x20 [ 71.750579][ T3095] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 71.757465][ T3095] 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 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 71.777268][ T3095] RSP: 0018:ffffc900026cfbc0 EFLAGS: 00010286 [ 71.783433][ T3095] RAX: 0000000000000000 RBX: ffff888021656b00 RCX: 0000000000000000 [ 71.791417][ T3095] RDX: ffff88801b70b880 RSI: ffffffff815c5205 RDI: fffff520004d9f6a [ 71.799558][ T3095] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 71.807578][ T3095] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff88801c4e0f20 [ 71.815631][ T3095] R13: 0000000000000000 R14: ffff888018cfc700 R15: 0000000000000001 [ 71.823787][ T3095] ? wake_up_klogd.part.0+0x8e/0xd0 [ 71.828992][ T3095] ? vprintk_func+0x95/0x1e0 [ 71.833778][ T3095] nf_unregister_net_hooks+0x117/0x160 [ 71.839258][ T3095] arpt_unregister_table_pre_exit+0x67/0x80 [ 71.845159][ T3095] ? arptable_filter_net_exit+0x20/0x20 [ 71.850816][ T3095] cleanup_net+0x451/0xb10 [ 71.855232][ T3095] ? ops_free_list.part.0+0x3d0/0x3d0 [ 71.860612][ T3095] process_one_work+0x98d/0x1600 [ 71.865570][ T3095] ? pwq_dec_nr_in_flight+0x320/0x320 [ 71.870957][ T3095] ? rwlock_bug.part.0+0x90/0x90 [ 71.875981][ T3095] ? _raw_spin_lock_irq+0x41/0x50 [ 71.881374][ T3095] worker_thread+0x64c/0x1120 [ 71.886171][ T3095] ? __kthread_parkme+0x13f/0x1e0 [ 71.891218][ T3095] ? process_one_work+0x1600/0x1600 [ 71.896516][ T3095] kthread+0x3b1/0x4a0 [ 71.900586][ T3095] ? __kthread_bind_mask+0xc0/0xc0 [ 71.906159][ T3095] ret_from_fork+0x1f/0x30 [ 71.911867][ T3095] Kernel Offset: disabled [ 71.916989][ T3095] Rebooting in 86400 seconds..