[ 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 '10.128.10.0' (ECDSA) to the list of known hosts. 2021/05/05 20:04:56 fuzzer started 2021/05/05 20:04:56 connecting to host at 10.128.0.169:35395 2021/05/05 20:04:56 checking machine... 2021/05/05 20:04:56 checking revisions... 2021/05/05 20:04:56 testing simple program... syzkaller login: [ 80.662380][ T8415] chnl_net:caif_netlink_parms(): no params data found [ 80.764450][ T8415] bridge0: port 1(bridge_slave_0) entered blocking state [ 80.773525][ T8415] bridge0: port 1(bridge_slave_0) entered disabled state [ 80.782983][ T8415] device bridge_slave_0 entered promiscuous mode [ 80.793835][ T8415] bridge0: port 2(bridge_slave_1) entered blocking state [ 80.802287][ T8415] bridge0: port 2(bridge_slave_1) entered disabled state [ 80.812812][ T8415] device bridge_slave_1 entered promiscuous mode [ 80.835945][ T8415] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 80.850206][ T8415] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 80.877576][ T8415] team0: Port device team_slave_0 added [ 80.885314][ T8415] team0: Port device team_slave_1 added [ 80.905363][ T8415] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 80.913695][ 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. [ 80.943972][ T8415] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 80.958000][ T8415] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 80.965478][ 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. [ 80.993314][ T8415] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 81.023430][ T8415] device hsr_slave_0 entered promiscuous mode [ 81.030669][ T8415] device hsr_slave_1 entered promiscuous mode [ 81.146212][ T8415] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 81.160380][ T8415] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 81.171870][ T8415] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 81.183441][ T8415] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 81.213386][ T8415] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.221662][ T8415] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.230029][ T8415] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.237575][ T8415] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.292162][ T8415] 8021q: adding VLAN 0 to HW filter on device bond0 [ 81.309539][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 81.323037][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.333270][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.343113][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 81.358037][ T8415] 8021q: adding VLAN 0 to HW filter on device team0 [ 81.373000][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 81.382980][ T20] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.390547][ T20] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.405095][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 81.417621][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.428074][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.452842][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 81.462635][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 81.482417][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 81.492313][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 81.503922][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 81.515816][ T8415] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 81.538605][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 81.547598][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 81.563633][ T8415] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 81.588985][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 81.613460][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 81.623463][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 81.633414][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 81.645156][ T8415] device veth0_vlan entered promiscuous mode [ 81.660014][ T8415] device veth1_vlan entered promiscuous mode [ 81.684491][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 81.695619][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 81.709647][ T8415] device veth0_macvtap entered promiscuous mode [ 81.722755][ T8415] device veth1_macvtap entered promiscuous mode [ 81.740276][ T8415] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 81.749319][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 81.758463][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 81.767866][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 81.777373][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready executing program [ 81.793550][ T8415] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 81.803164][ T4859] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 81.813809][ T4859] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 81.828871][ T8415] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.839264][ T8415] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.849587][ T8415] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.859223][ T8415] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.958416][ T303] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.966445][ T303] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.998573][ T25] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.001145][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 82.010770][ T25] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.039503][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/05 20:04:59 building call list... [ 82.674548][ T25] ------------[ cut here ]------------ [ 82.685742][ T25] hook not found, pf 3 num 0 [ 82.689726][ T25] WARNING: CPU: 0 PID: 25 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 82.708845][ T25] Modules linked in: [ 82.713054][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 82.723218][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.738218][ T25] Workqueue: netns cleanup_net [ 82.744125][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 82.754700][ 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 c0 d8 6d 8a e8 50 5b 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 82.777516][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 82.785287][ T25] RAX: 0000000000000000 RBX: ffff888149eb4900 RCX: 0000000000000000 [ 82.794251][ T25] RDX: ffff88801597b880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 82.802651][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 82.812471][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888019840f20 [ 82.835818][ T25] R13: 0000000000000000 R14: ffff888020809480 R15: 0000000000000001 [ 82.847435][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 82.858626][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.865989][ T25] CR2: 000000c000800000 CR3: 000000001b3fe000 CR4: 00000000001506f0 [ 82.875697][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.887072][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.897284][ T25] Call Trace: [ 82.900796][ T25] nf_unregister_net_hooks+0x117/0x160 [ 82.916019][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 82.923337][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 82.932772][ T25] cleanup_net+0x451/0xb10 [ 82.938836][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 82.944964][ T25] process_one_work+0x98d/0x1600 [ 82.954323][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 82.961624][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 82.971175][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 82.979087][ T25] worker_thread+0x64c/0x1120 [ 82.984363][ T25] ? process_one_work+0x1600/0x1600 [ 82.993821][ T25] kthread+0x3b1/0x4a0 [ 82.998903][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 83.004767][ T25] ret_from_fork+0x1f/0x30 [ 83.012995][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 83.020202][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 83.028773][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.040830][ T25] Workqueue: netns cleanup_net [ 83.045824][ T25] Call Trace: [ 83.049832][ T25] dump_stack+0x141/0x1d7 [ 83.055252][ T25] panic+0x306/0x73d [ 83.059580][ T25] ? __warn_printk+0xf3/0xf3 [ 83.064335][ T25] ? __warn.cold+0x1a/0x44 [ 83.069577][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.076498][ T25] __warn.cold+0x35/0x44 [ 83.081281][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.087883][ T25] report_bug+0x1bd/0x210 [ 83.092604][ T25] handle_bug+0x3c/0x60 [ 83.096942][ T25] exc_invalid_op+0x14/0x40 [ 83.101823][ T25] asm_exc_invalid_op+0x12/0x20 [ 83.107135][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 83.114359][ 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 c0 d8 6d 8a e8 50 5b 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 83.136602][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 83.146905][ T25] RAX: 0000000000000000 RBX: ffff888149eb4900 RCX: 0000000000000000 [ 83.155678][ T25] RDX: ffff88801597b880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 83.164202][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 83.172623][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888019840f20 [ 83.182285][ T25] R13: 0000000000000000 R14: ffff888020809480 R15: 0000000000000001 [ 83.191168][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 83.196500][ T25] ? vprintk+0x95/0x260 [ 83.200886][ T25] nf_unregister_net_hooks+0x117/0x160 [ 83.207290][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 83.214011][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 83.220238][ T25] cleanup_net+0x451/0xb10 [ 83.224869][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 83.231069][ T25] process_one_work+0x98d/0x1600 [ 83.236359][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 83.241885][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 83.247266][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 83.252860][ T25] worker_thread+0x64c/0x1120 [ 83.257605][ T25] ? process_one_work+0x1600/0x1600 [ 83.263212][ T25] kthread+0x3b1/0x4a0 [ 83.267760][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 83.274595][ T25] ret_from_fork+0x1f/0x30 [ 83.281089][ T25] Kernel Offset: disabled [ 83.286185][ T25] Rebooting in 86400 seconds..