[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.114' (ECDSA) to the list of known hosts. 2021/05/01 00:10:44 fuzzer started 2021/05/01 00:10:44 connecting to host at 10.128.0.169:41767 2021/05/01 00:10:44 checking machine... 2021/05/01 00:10:44 checking revisions... 2021/05/01 00:10:44 testing simple program... syzkaller login: [ 77.826556][ T8417] chnl_net:caif_netlink_parms(): no params data found [ 77.883927][ T8417] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.895775][ T8417] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.907165][ T8417] device bridge_slave_0 entered promiscuous mode [ 77.918090][ T8417] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.926914][ T8417] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.935823][ T8417] device bridge_slave_1 entered promiscuous mode [ 77.956973][ T8417] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 77.979920][ T8417] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 78.007985][ T8417] team0: Port device team_slave_0 added [ 78.015936][ T8417] team0: Port device team_slave_1 added [ 78.035155][ T8417] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 78.044056][ T8417] 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. [ 78.073823][ T8417] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 78.087839][ T8417] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 78.095424][ T8417] 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. [ 78.126618][ T8417] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 78.153966][ T8417] device hsr_slave_0 entered promiscuous mode [ 78.162288][ T8417] device hsr_slave_1 entered promiscuous mode [ 78.270744][ T8417] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.282943][ T8417] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.295596][ T8417] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.310329][ T8417] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 78.339647][ T8417] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.348035][ T8417] bridge0: port 2(bridge_slave_1) entered forwarding state [ 78.358065][ T8417] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.366661][ T8417] bridge0: port 1(bridge_slave_0) entered forwarding state [ 78.420668][ T8417] 8021q: adding VLAN 0 to HW filter on device bond0 [ 78.435599][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.450871][ T2938] bridge0: port 1(bridge_slave_0) entered disabled state [ 78.460069][ T2938] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.471777][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 78.488087][ T8417] 8021q: adding VLAN 0 to HW filter on device team0 [ 78.500998][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 78.512194][ T2938] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.520187][ T2938] bridge0: port 1(bridge_slave_0) entered forwarding state [ 78.538172][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 78.547691][ T2938] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.558090][ T2938] bridge0: port 2(bridge_slave_1) entered forwarding state [ 78.576358][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 78.587518][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 78.600435][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 78.619721][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 78.630332][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 78.643920][ T8417] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 78.665439][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 78.675619][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 78.692866][ T8417] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 78.716957][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 78.742652][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 78.752712][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 78.764368][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 78.779024][ T8417] device veth0_vlan entered promiscuous mode [ 78.793377][ T8417] device veth1_vlan entered promiscuous mode [ 78.808895][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 78.818959][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 78.845250][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 78.857436][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 78.872638][ T8417] device veth0_macvtap entered promiscuous mode [ 78.885649][ T8417] device veth1_macvtap entered promiscuous mode [ 78.907884][ T8417] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 78.916956][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 78.927231][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 78.937270][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 78.946819][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 78.962985][ T8417] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 78.972482][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 78.983093][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 78.998889][ T8417] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.009674][ T8417] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.019587][ T8417] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.029739][ T8417] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.140182][ T193] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.157603][ T193] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.181960][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready executing program [ 79.204375][ T193] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.213899][ T193] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.226348][ T33] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/01 00:10:47 building call list... [ 79.909757][ T193] ------------[ cut here ]------------ [ 79.920223][ T193] hook not found, pf 3 num 0 [ 79.920856][ T193] WARNING: CPU: 1 PID: 193 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 79.939785][ T193] Modules linked in: [ 79.943924][ T193] CPU: 1 PID: 193 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 79.956192][ T193] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 79.969117][ T193] Workqueue: netns cleanup_net [ 79.974708][ T193] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 79.983031][ T193] 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 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 80.008876][ T193] RSP: 0018:ffffc9000172fbc0 EFLAGS: 00010286 [ 80.015197][ T193] RAX: 0000000000000000 RBX: ffff888021f8e900 RCX: 0000000000000000 [ 80.027193][ T193] RDX: ffff8880127a54c0 RSI: ffffffff815c8ba5 RDI: fffff520002e5f6a [ 80.035786][ T193] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 80.064306][ T193] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88802de70f20 [ 80.074910][ T193] R13: 0000000000000000 R14: ffff888021475400 R15: 0000000000000001 [ 80.086335][ T193] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 80.097479][ T193] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.104630][ T193] CR2: 00007efd16877000 CR3: 0000000011f35000 CR4: 00000000001506e0 [ 80.115521][ T193] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.125241][ T193] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.140713][ T193] Call Trace: [ 80.144155][ T193] nf_unregister_net_hooks+0x117/0x160 [ 80.153515][ T193] arpt_unregister_table_pre_exit+0x67/0x80 [ 80.161227][ T193] ? arptable_filter_net_exit+0x20/0x20 [ 80.169996][ T193] cleanup_net+0x451/0xb10 [ 80.175540][ T193] ? ops_free_list.part.0+0x3d0/0x3d0 [ 80.183418][ T193] process_one_work+0x98d/0x1600 [ 80.190115][ T193] ? pwq_dec_nr_in_flight+0x320/0x320 [ 80.197519][ T193] ? rwlock_bug.part.0+0x90/0x90 [ 80.203218][ T193] ? _raw_spin_lock_irq+0x41/0x50 [ 80.213299][ T193] worker_thread+0x64c/0x1120 [ 80.219784][ T193] ? __kthread_parkme+0x13f/0x1e0 [ 80.225316][ T193] ? process_one_work+0x1600/0x1600 [ 80.232504][ T193] kthread+0x3b1/0x4a0 [ 80.239246][ T193] ? __kthread_bind_mask+0xc0/0xc0 [ 80.244964][ T193] ret_from_fork+0x1f/0x30 [ 80.251643][ T193] Kernel panic - not syncing: panic_on_warn set ... [ 80.258887][ T193] CPU: 1 PID: 193 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 80.268326][ T193] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.279413][ T193] Workqueue: netns cleanup_net [ 80.284469][ T193] Call Trace: [ 80.288106][ T193] dump_stack+0x141/0x1d7 [ 80.293414][ T193] panic+0x306/0x73d [ 80.297612][ T193] ? __warn_printk+0xf3/0xf3 [ 80.303816][ T193] ? __warn.cold+0x1a/0x44 [ 80.308434][ T193] ? __nf_unregister_net_hook+0x1eb/0x610 [ 80.314884][ T193] __warn.cold+0x35/0x44 [ 80.319237][ T193] ? __nf_unregister_net_hook+0x1eb/0x610 [ 80.325150][ T193] report_bug+0x1bd/0x210 [ 80.329767][ T193] handle_bug+0x3c/0x60 [ 80.334233][ T193] exc_invalid_op+0x14/0x40 [ 80.339098][ T193] asm_exc_invalid_op+0x12/0x20 [ 80.344340][ T193] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 80.351594][ T193] 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 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 80.372319][ T193] RSP: 0018:ffffc9000172fbc0 EFLAGS: 00010286 [ 80.378420][ T193] RAX: 0000000000000000 RBX: ffff888021f8e900 RCX: 0000000000000000 [ 80.386542][ T193] RDX: ffff8880127a54c0 RSI: ffffffff815c8ba5 RDI: fffff520002e5f6a [ 80.394808][ T193] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 80.402890][ T193] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88802de70f20 [ 80.411254][ T193] R13: 0000000000000000 R14: ffff888021475400 R15: 0000000000000001 [ 80.419608][ T193] ? wake_up_klogd.part.0+0x8e/0xd0 [ 80.425380][ T193] ? vprintk+0x95/0x260 [ 80.430287][ T193] nf_unregister_net_hooks+0x117/0x160 [ 80.435949][ T193] arpt_unregister_table_pre_exit+0x67/0x80 [ 80.442218][ T193] ? arptable_filter_net_exit+0x20/0x20 [ 80.447974][ T193] cleanup_net+0x451/0xb10 [ 80.452418][ T193] ? ops_free_list.part.0+0x3d0/0x3d0 [ 80.458347][ T193] process_one_work+0x98d/0x1600 [ 80.463983][ T193] ? pwq_dec_nr_in_flight+0x320/0x320 [ 80.469830][ T193] ? rwlock_bug.part.0+0x90/0x90 [ 80.474927][ T193] ? _raw_spin_lock_irq+0x41/0x50 [ 80.480110][ T193] worker_thread+0x64c/0x1120 [ 80.485073][ T193] ? __kthread_parkme+0x13f/0x1e0 [ 80.490321][ T193] ? process_one_work+0x1600/0x1600 [ 80.495920][ T193] kthread+0x3b1/0x4a0 [ 80.500493][ T193] ? __kthread_bind_mask+0xc0/0xc0 [ 80.506132][ T193] ret_from_fork+0x1f/0x30 [ 80.512716][ T193] Kernel Offset: disabled [ 80.517508][ T193] Rebooting in 86400 seconds..