[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 '10.128.1.68' (ECDSA) to the list of known hosts. 2021/04/30 00:34:37 fuzzer started 2021/04/30 00:34:37 connecting to host at 10.128.0.169:33289 2021/04/30 00:34:37 checking machine... 2021/04/30 00:34:37 checking revisions... 2021/04/30 00:34:37 testing simple program... syzkaller login: [ 78.108919][ T8415] chnl_net:caif_netlink_parms(): no params data found [ 78.180340][ T8415] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.190123][ T8415] bridge0: port 1(bridge_slave_0) entered disabled state [ 78.199522][ T8415] device bridge_slave_0 entered promiscuous mode [ 78.209789][ T8415] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.217454][ T8415] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.225963][ T8415] device bridge_slave_1 entered promiscuous mode [ 78.249674][ T8415] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 78.264796][ T8415] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 78.287523][ T8415] team0: Port device team_slave_0 added [ 78.295892][ T8415] team0: Port device team_slave_1 added [ 78.313754][ T8415] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 78.321293][ T8415] 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. [ 78.352116][ T8415] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 78.367952][ T8415] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 78.376263][ T8415] 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. [ 78.406702][ T8415] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 78.437534][ T8415] device hsr_slave_0 entered promiscuous mode [ 78.446059][ T8415] device hsr_slave_1 entered promiscuous mode [ 78.613924][ T8415] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.628368][ T8415] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.640870][ T8415] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.651817][ T8415] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 78.693843][ T8415] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.701660][ T8415] bridge0: port 2(bridge_slave_1) entered forwarding state [ 78.709906][ T8415] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.717286][ T8415] bridge0: port 1(bridge_slave_0) entered forwarding state [ 78.770059][ T8415] 8021q: adding VLAN 0 to HW filter on device bond0 [ 78.787321][ T3811] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.800111][ T3811] bridge0: port 1(bridge_slave_0) entered disabled state [ 78.810019][ T3811] bridge0: port 2(bridge_slave_1) entered disabled state [ 78.820657][ T3811] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 78.837770][ T8415] 8021q: adding VLAN 0 to HW filter on device team0 [ 78.852493][ T3811] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 78.861694][ T3811] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.869568][ T3811] bridge0: port 1(bridge_slave_0) entered forwarding state [ 78.884454][ T3811] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 78.894774][ T3811] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.902533][ T3811] bridge0: port 2(bridge_slave_1) entered forwarding state [ 78.926284][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 78.936872][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 78.945827][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 78.963307][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 78.972968][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 78.985309][ T8415] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 79.005316][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 79.013490][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 79.028584][ T8415] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 79.051630][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 79.075080][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 79.085675][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 79.096040][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 79.107768][ T8415] device veth0_vlan entered promiscuous mode [ 79.123744][ T8415] device veth1_vlan entered promiscuous mode [ 79.152351][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 79.163777][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 79.178897][ T8415] device veth0_macvtap entered promiscuous mode [ 79.190700][ T8415] device veth1_macvtap entered promiscuous mode [ 79.210417][ T8415] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 79.229174][ T8415] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 79.239298][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 79.249908][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 79.259549][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 79.270178][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 79.280450][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 79.290666][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 79.306208][ T8415] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.315629][ T8415] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.326155][ T8415] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 79.336056][ T8415] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 79.440813][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.470636][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.487170][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 79.516307][ T28] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 79.528078][ T28] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 79.540594][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/30 00:34:41 building call list... [ 80.245273][ T28] ------------[ cut here ]------------ [ 80.253427][ T28] hook not found, pf 3 num 0 [ 80.254081][ T28] WARNING: CPU: 0 PID: 28 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 80.272431][ T28] Modules linked in: [ 80.276764][ T28] CPU: 0 PID: 28 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 80.292531][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.305288][ T28] Workqueue: netns cleanup_net [ 80.310768][ T28] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 80.322235][ T28] 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 60 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 80.347258][ T28] RSP: 0018:ffffc90000e2fbc0 EFLAGS: 00010286 [ 80.355126][ T28] RAX: 0000000000000000 RBX: ffff888146246c00 RCX: 0000000000000000 [ 80.366664][ T28] RDX: ffff888011fb9c40 RSI: ffffffff815c8ba5 RDI: fffff520001c5f6a [ 80.376835][ T28] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 80.388191][ T28] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880127d8f20 [ 80.399147][ T28] R13: 0000000000000000 R14: ffff88801dc62200 R15: 0000000000000001 [ 80.409937][ T28] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 80.423044][ T28] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.429849][ T28] CR2: 00007f41a86a5000 CR3: 000000002045b000 CR4: 00000000001506f0 [ 80.440490][ T28] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.450222][ T28] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.460586][ T28] Call Trace: [ 80.465551][ T28] nf_unregister_net_hooks+0x117/0x160 [ 80.479442][ T28] arpt_unregister_table_pre_exit+0x67/0x80 [ 80.487282][ T28] ? arptable_filter_net_exit+0x20/0x20 [ 80.494234][ T28] cleanup_net+0x451/0xb10 [ 80.499102][ T28] ? ops_free_list.part.0+0x3d0/0x3d0 [ 80.508631][ T28] process_one_work+0x98d/0x1600 [ 80.515654][ T28] ? pwq_dec_nr_in_flight+0x320/0x320 [ 80.522945][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 80.528158][ T28] ? _raw_spin_lock_irq+0x41/0x50 [ 80.534861][ T28] worker_thread+0x64c/0x1120 [ 80.539706][ T28] ? __kthread_parkme+0x13f/0x1e0 [ 80.547624][ T28] ? process_one_work+0x1600/0x1600 [ 80.554421][ T28] kthread+0x3b1/0x4a0 [ 80.559057][ T28] ? __kthread_bind_mask+0xc0/0xc0 [ 80.566296][ T28] ret_from_fork+0x1f/0x30 [ 80.570775][ T28] Kernel panic - not syncing: panic_on_warn set ... [ 80.577610][ T28] CPU: 0 PID: 28 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 80.585820][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.596163][ T28] Workqueue: netns cleanup_net [ 80.601106][ T28] Call Trace: [ 80.604504][ T28] dump_stack+0x141/0x1d7 [ 80.608955][ T28] panic+0x306/0x73d [ 80.612961][ T28] ? __warn_printk+0xf3/0xf3 [ 80.617672][ T28] ? __warn.cold+0x1a/0x44 [ 80.622219][ T28] ? __nf_unregister_net_hook+0x1eb/0x610 [ 80.628059][ T28] __warn.cold+0x35/0x44 [ 80.632411][ T28] ? __nf_unregister_net_hook+0x1eb/0x610 [ 80.638440][ T28] report_bug+0x1bd/0x210 [ 80.642884][ T28] handle_bug+0x3c/0x60 [ 80.647370][ T28] exc_invalid_op+0x14/0x40 [ 80.651901][ T28] asm_exc_invalid_op+0x12/0x20 [ 80.656767][ T28] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 80.663235][ T28] 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 60 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 80.683392][ T28] RSP: 0018:ffffc90000e2fbc0 EFLAGS: 00010286 [ 80.689560][ T28] RAX: 0000000000000000 RBX: ffff888146246c00 RCX: 0000000000000000 [ 80.697554][ T28] RDX: ffff888011fb9c40 RSI: ffffffff815c8ba5 RDI: fffff520001c5f6a [ 80.705564][ T28] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 80.714071][ T28] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880127d8f20 [ 80.722423][ T28] R13: 0000000000000000 R14: ffff88801dc62200 R15: 0000000000000001 [ 80.730846][ T28] ? wake_up_klogd.part.0+0x8e/0xd0 [ 80.736175][ T28] ? vprintk+0x95/0x260 [ 80.740456][ T28] nf_unregister_net_hooks+0x117/0x160 [ 80.746127][ T28] arpt_unregister_table_pre_exit+0x67/0x80 [ 80.752218][ T28] ? arptable_filter_net_exit+0x20/0x20 [ 80.758012][ T28] cleanup_net+0x451/0xb10 [ 80.762640][ T28] ? ops_free_list.part.0+0x3d0/0x3d0 [ 80.768134][ T28] process_one_work+0x98d/0x1600 [ 80.773580][ T28] ? pwq_dec_nr_in_flight+0x320/0x320 [ 80.779463][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 80.785429][ T28] ? _raw_spin_lock_irq+0x41/0x50 [ 80.791463][ T28] worker_thread+0x64c/0x1120 [ 80.796651][ T28] ? __kthread_parkme+0x13f/0x1e0 [ 80.802127][ T28] ? process_one_work+0x1600/0x1600 [ 80.808221][ T28] kthread+0x3b1/0x4a0 [ 80.812481][ T28] ? __kthread_bind_mask+0xc0/0xc0 [ 80.818057][ T28] ret_from_fork+0x1f/0x30 [ 80.824577][ T28] Kernel Offset: disabled [ 80.829700][ T28] Rebooting in 86400 seconds..