[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.47' (ECDSA) to the list of known hosts. 2021/05/04 04:18:16 fuzzer started 2021/05/04 04:18:16 connecting to host at 10.128.0.169:44577 2021/05/04 04:18:16 checking machine... 2021/05/04 04:18:16 checking revisions... 2021/05/04 04:18:16 testing simple program... syzkaller login: [ 78.433156][ T8440] chnl_net:caif_netlink_parms(): no params data found [ 78.496003][ T8440] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.505119][ T8440] bridge0: port 1(bridge_slave_0) entered disabled state [ 78.514541][ T8440] device bridge_slave_0 entered promiscuous mode [ 78.525538][ T8440] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.533680][ T8440] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.546798][ T8440] device bridge_slave_1 entered promiscuous mode [ 78.567658][ T8440] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 78.579811][ T8440] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 78.603986][ T8440] team0: Port device team_slave_0 added [ 78.611753][ T8440] team0: Port device team_slave_1 added [ 78.629591][ T8440] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 78.637275][ T8440] 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. [ 78.663939][ T8440] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 78.678162][ T8440] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 78.685119][ T8440] 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. [ 78.711398][ T8440] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 78.739568][ T8440] device hsr_slave_0 entered promiscuous mode [ 78.746490][ T8440] device hsr_slave_1 entered promiscuous mode [ 78.858942][ T8440] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.876952][ T8440] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.888446][ T8440] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.900154][ T8440] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 78.930991][ T8440] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.938256][ T8440] bridge0: port 2(bridge_slave_1) entered forwarding state [ 78.946295][ T8440] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.953393][ T8440] bridge0: port 1(bridge_slave_0) entered forwarding state [ 78.999279][ T8440] 8021q: adding VLAN 0 to HW filter on device bond0 [ 79.018154][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 79.031704][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 79.040439][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 79.049448][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 79.065147][ T8440] 8021q: adding VLAN 0 to HW filter on device team0 [ 79.080663][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 79.090570][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 79.097751][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 79.120884][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 79.130634][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 79.138124][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 79.162217][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 79.177165][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 79.185722][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 79.207921][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 79.219529][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 79.231779][ T8440] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 79.261091][ T2940] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 79.270251][ T2940] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 79.285658][ T8440] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 79.310481][ T2940] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 79.333693][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 79.342418][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 79.352882][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 79.364528][ T8440] device veth0_vlan entered promiscuous mode [ 79.377445][ T8440] device veth1_vlan entered promiscuous mode [ 79.400815][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 79.410294][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 79.419778][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 79.433188][ T8440] device veth0_macvtap entered promiscuous mode [ 79.443775][ T8440] device veth1_macvtap entered promiscuous mode [ 79.462280][ T8440] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 79.472713][ T2940] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 79.483019][ T2940] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 79.495220][ T8440] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 79.503522][ T8661] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 79.512504][ T8661] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 79.525684][ T8440] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.535340][ T8440] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.544502][ T8440] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.554523][ T8440] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.661523][ T25] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.670033][ T25] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.695647][ T8662] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 79.713183][ T500] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.722451][ T500] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.733456][ T3860] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/04 04:18:19 building call list... [ 80.404617][ T500] ------------[ cut here ]------------ [ 80.418839][ T500] hook not found, pf 3 num 0 [ 80.419533][ T500] WARNING: CPU: 0 PID: 500 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 80.437885][ T500] Modules linked in: [ 80.442647][ T500] CPU: 0 PID: 500 Comm: kworker/u4:6 Not tainted 5.12.0-syzkaller #0 [ 80.452253][ T500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.463800][ T500] Workqueue: netns cleanup_net [ 80.469629][ T500] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 80.476689][ T500] 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 c0 78 6d 8a e8 90 4a 8a 01 <0f> 0b e9 e5 00 00 00 e8 a9 46 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 80.498773][ T500] RSP: 0018:ffffc9000288fbc0 EFLAGS: 00010286 [ 80.505129][ T500] RAX: 0000000000000000 RBX: ffff88814762d800 RCX: 0000000000000000 [ 80.521028][ T500] RDX: ffff8880132b9c40 RSI: ffffffff815c8ba5 RDI: fffff52000511f6a [ 80.529571][ T500] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 80.538442][ T500] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888026530f20 [ 80.546947][ T500] R13: 0000000000000000 R14: ffff888015890d00 R15: 0000000000000001 [ 80.555033][ T500] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 80.564931][ T500] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.572454][ T500] CR2: 00005638665796b0 CR3: 000000001e69c000 CR4: 00000000001506f0 [ 80.581173][ T500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.592857][ T500] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.601621][ T500] Call Trace: [ 80.605359][ T500] nf_unregister_net_hooks+0x117/0x160 [ 80.611429][ T500] arpt_unregister_table_pre_exit+0x67/0x80 [ 80.617887][ T500] ? arptable_filter_net_exit+0x20/0x20 [ 80.623469][ T500] cleanup_net+0x451/0xb10 [ 80.629881][ T500] ? ops_free_list.part.0+0x3d0/0x3d0 [ 80.635428][ T500] process_one_work+0x98d/0x1600 [ 80.641096][ T500] ? pwq_dec_nr_in_flight+0x320/0x320 [ 80.647441][ T500] ? rwlock_bug.part.0+0x90/0x90 [ 80.652422][ T500] ? _raw_spin_lock_irq+0x41/0x50 [ 80.658134][ T500] worker_thread+0x64c/0x1120 [ 80.662865][ T500] ? __kthread_parkme+0x13f/0x1e0 [ 80.674291][ T500] ? process_one_work+0x1600/0x1600 [ 80.680102][ T500] kthread+0x3b1/0x4a0 [ 80.684202][ T500] ? __kthread_bind_mask+0xc0/0xc0 [ 80.690139][ T500] ret_from_fork+0x1f/0x30 [ 80.694619][ T500] Kernel panic - not syncing: panic_on_warn set ... [ 80.701206][ T500] CPU: 0 PID: 500 Comm: kworker/u4:6 Not tainted 5.12.0-syzkaller #0 [ 80.709288][ T500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.719455][ T500] Workqueue: netns cleanup_net [ 80.724241][ T500] Call Trace: [ 80.727530][ T500] dump_stack+0x141/0x1d7 [ 80.731915][ T500] panic+0x306/0x73d [ 80.735857][ T500] ? __warn_printk+0xf3/0xf3 [ 80.740486][ T500] ? __warn.cold+0x1a/0x44 [ 80.744930][ T500] ? __nf_unregister_net_hook+0x1eb/0x610 [ 80.750689][ T500] __warn.cold+0x35/0x44 [ 80.754953][ T500] ? __nf_unregister_net_hook+0x1eb/0x610 [ 80.760737][ T500] report_bug+0x1bd/0x210 [ 80.765198][ T500] handle_bug+0x3c/0x60 [ 80.769371][ T500] exc_invalid_op+0x14/0x40 [ 80.774887][ T500] asm_exc_invalid_op+0x12/0x20 [ 80.780013][ T500] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 80.786559][ T500] 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 c0 78 6d 8a e8 90 4a 8a 01 <0f> 0b e9 e5 00 00 00 e8 a9 46 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 80.806190][ T500] RSP: 0018:ffffc9000288fbc0 EFLAGS: 00010286 [ 80.812394][ T500] RAX: 0000000000000000 RBX: ffff88814762d800 RCX: 0000000000000000 [ 80.820465][ T500] RDX: ffff8880132b9c40 RSI: ffffffff815c8ba5 RDI: fffff52000511f6a [ 80.828466][ T500] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 80.836446][ T500] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888026530f20 [ 80.844427][ T500] R13: 0000000000000000 R14: ffff888015890d00 R15: 0000000000000001 [ 80.852415][ T500] ? wake_up_klogd.part.0+0x8e/0xd0 [ 80.857638][ T500] ? vprintk+0x95/0x260 [ 80.861838][ T500] nf_unregister_net_hooks+0x117/0x160 [ 80.867324][ T500] arpt_unregister_table_pre_exit+0x67/0x80 [ 80.873510][ T500] ? arptable_filter_net_exit+0x20/0x20 [ 80.879082][ T500] cleanup_net+0x451/0xb10 [ 80.883606][ T500] ? ops_free_list.part.0+0x3d0/0x3d0 [ 80.889089][ T500] process_one_work+0x98d/0x1600 [ 80.894152][ T500] ? pwq_dec_nr_in_flight+0x320/0x320 [ 80.899829][ T500] ? rwlock_bug.part.0+0x90/0x90 [ 80.904878][ T500] ? _raw_spin_lock_irq+0x41/0x50 [ 80.910018][ T500] worker_thread+0x64c/0x1120 [ 80.914851][ T500] ? __kthread_parkme+0x13f/0x1e0 [ 80.919915][ T500] ? process_one_work+0x1600/0x1600 [ 80.925229][ T500] kthread+0x3b1/0x4a0 [ 80.929328][ T500] ? __kthread_bind_mask+0xc0/0xc0 [ 80.934576][ T500] ret_from_fork+0x1f/0x30 [ 80.940440][ T500] Kernel Offset: disabled [ 80.945032][ T500] Rebooting in 86400 seconds..