WARNING in __nf_unregister_net_hook ------------[ cut here ]------------ hook not found, pf 3 num 0 WARNING: CPU: 0 PID: 301 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 net/netfilter/core.c:480 Modules linked in: CPU: 0 PID: 301 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 net/netfilter/core.c:480 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 e0 16 6e 8a e8 c8 34 8a 01 <0f> 0b e9 e5 00 00 00 e8 b9 35 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 RSP: 0018:ffffc90000f7fbc0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff88814499e100 RCX: 0000000000000000 RDX: ffff8880122f9c40 RSI: ffffffff815cc9a5 RDI: fffff520001eff6a RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815c680e R11: 0000000000000000 R12: ffff888018750f20 R13: 0000000000000000 R14: ffff888011ed7a80 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff2664526c0 CR3: 000000000b48e000 CR4: 0000000000350ef0 Call Trace: nf_unregister_net_hook net/netfilter/core.c:502 [inline] nf_unregister_net_hooks+0x117/0x160 net/netfilter/core.c:576 arpt_unregister_table_pre_exit+0x67/0x80 net/ipv4/netfilter/arp_tables.c:1565 ops_pre_exit_list net/core/net_namespace.c:165 [inline] cleanup_net+0x451/0xb10 net/core/net_namespace.c:583 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Warning: Permanently added '10.128.15.206' (ECDSA) to the list of known hosts. 2021/05/08 02:59:32 fuzzer started 2021/05/08 02:59:32 connecting to host at 10.128.0.169:36287 2021/05/08 02:59:32 checking machine... 2021/05/08 02:59:32 checking revisions... 2021/05/08 02:59:32 testing simple program... syzkaller login: [ 56.181424][ T8408] chnl_net:caif_netlink_parms(): no params data found [ 56.222404][ T8408] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.231035][ T8408] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.239339][ T8408] device bridge_slave_0 entered promiscuous mode [ 56.249119][ T8408] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.256455][ T8408] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.264318][ T8408] device bridge_slave_1 entered promiscuous mode [ 56.282447][ T8408] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.293041][ T8408] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.312588][ T8408] team0: Port device team_slave_0 added [ 56.320696][ T8408] team0: Port device team_slave_1 added [ 56.334148][ T8408] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 56.341244][ T8408] 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. [ 56.367200][ T8408] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 56.379399][ T8408] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 56.386392][ T8408] 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. [ 56.412360][ T8408] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 56.437106][ T8408] device hsr_slave_0 entered promiscuous mode [ 56.443924][ T8408] device hsr_slave_1 entered promiscuous mode [ 56.523492][ T8408] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 56.532950][ T8408] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 56.543404][ T8408] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 56.552169][ T8408] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 56.572873][ T8408] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.580025][ T8408] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.587737][ T8408] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.594783][ T8408] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.633591][ T8408] 8021q: adding VLAN 0 to HW filter on device bond0 [ 56.645493][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 56.657857][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.665696][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.674345][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 56.687352][ T8408] 8021q: adding VLAN 0 to HW filter on device team0 [ 56.698822][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 56.707402][ T20] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.714645][ T20] bridge0: port 1(bridge_slave_0) entered forwarding state [ 56.725273][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 56.734513][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.741695][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 56.767955][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 56.777547][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 56.786273][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 56.794564][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 56.803288][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 56.812762][ T8408] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 56.829753][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 56.837351][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 56.850878][ T8408] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 56.867747][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 56.884586][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 56.893590][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 56.901383][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 56.917779][ T8408] device veth0_vlan entered promiscuous mode [ 56.933797][ T8408] device veth1_vlan entered promiscuous mode [ 56.953566][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 56.961792][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 56.970260][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 56.981041][ T8408] device veth0_macvtap entered promiscuous mode [ 56.990457][ T8408] device veth1_macvtap entered promiscuous mode [ 57.004288][ T8408] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 57.013227][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 57.022477][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 57.033414][ T8408] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 57.041068][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 57.052175][ T8408] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 57.063980][ T8408] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 57.072941][ T8408] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 57.081913][ T8408] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 57.155090][ T534] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 57.172083][ T534] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 57.185514][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 57.203688][ T534] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 57.213733][ T534] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 57.223356][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/08 02:59:35 building call list... executing program [ 57.723686][ T301] ------------[ cut here ]------------ [ 57.729926][ T301] hook not found, pf 3 num 0 [ 57.730427][ T301] WARNING: CPU: 0 PID: 301 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 57.749796][ T301] Modules linked in: [ 57.753873][ T301] CPU: 0 PID: 301 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0 [ 57.764183][ T301] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.776079][ T301] Workqueue: netns cleanup_net [ 57.786805][ T301] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 57.793658][ T301] 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 e0 16 6e 8a e8 c8 34 8a 01 <0f> 0b e9 e5 00 00 00 e8 b9 35 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 57.816302][ T301] RSP: 0018:ffffc90000f7fbc0 EFLAGS: 00010286 [ 57.822682][ T301] RAX: 0000000000000000 RBX: ffff88814499e100 RCX: 0000000000000000 [ 57.834485][ T301] RDX: ffff8880122f9c40 RSI: ffffffff815cc9a5 RDI: fffff520001eff6a [ 57.842713][ T301] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 57.850864][ T301] R10: ffffffff815c680e R11: 0000000000000000 R12: ffff888018750f20 [ 57.859292][ T301] R13: 0000000000000000 R14: ffff888011ed7a80 R15: 0000000000000001 [ 57.867464][ T301] FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 57.876723][ T301] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.883318][ T301] CR2: 00007ff2664526c0 CR3: 000000000b48e000 CR4: 0000000000350ef0 [ 57.891426][ T301] Call Trace: [ 57.894714][ T301] nf_unregister_net_hooks+0x117/0x160 [ 57.900370][ T301] arpt_unregister_table_pre_exit+0x67/0x80 [ 57.908902][ T301] ? arptable_filter_net_exit+0x20/0x20 [ 57.914462][ T301] cleanup_net+0x451/0xb10 [ 57.919724][ T301] ? ops_free_list.part.0+0x3d0/0x3d0 [ 57.925249][ T301] process_one_work+0x98d/0x1600 [ 57.931940][ T301] ? pwq_dec_nr_in_flight+0x320/0x320 [ 57.937937][ T301] ? rwlock_bug.part.0+0x90/0x90 [ 57.943091][ T301] ? _raw_spin_lock_irq+0x41/0x50 [ 57.949237][ T301] worker_thread+0x64c/0x1120 [ 57.953940][ T301] ? process_one_work+0x1600/0x1600 [ 57.961432][ T301] kthread+0x3b1/0x4a0 [ 57.965516][ T301] ? __kthread_bind_mask+0xc0/0xc0 [ 57.971702][ T301] ret_from_fork+0x1f/0x30 [ 57.977011][ T301] Kernel panic - not syncing: panic_on_warn set ... [ 57.983685][ T301] CPU: 0 PID: 301 Comm: kworker/u4:5 Not tainted 5.12.0-syzkaller #0 [ 57.991757][ T301] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.001810][ T301] Workqueue: netns cleanup_net [ 58.006582][ T301] Call Trace: [ 58.009857][ T301] dump_stack+0x141/0x1d7 [ 58.014195][ T301] panic+0x306/0x73d [ 58.018098][ T301] ? __warn_printk+0xf3/0xf3 [ 58.022699][ T301] ? __warn.cold+0x1a/0x44 [ 58.027126][ T301] ? __nf_unregister_net_hook+0x1eb/0x610 [ 58.032853][ T301] __warn.cold+0x35/0x44 [ 58.037098][ T301] ? __nf_unregister_net_hook+0x1eb/0x610 [ 58.042825][ T301] report_bug+0x1bd/0x210 [ 58.047167][ T301] handle_bug+0x3c/0x60 [ 58.051325][ T301] exc_invalid_op+0x14/0x40 [ 58.056012][ T301] asm_exc_invalid_op+0x12/0x20 [ 58.060877][ T301] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 58.067211][ T301] 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 e0 16 6e 8a e8 c8 34 8a 01 <0f> 0b e9 e5 00 00 00 e8 b9 35 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 58.086819][ T301] RSP: 0018:ffffc90000f7fbc0 EFLAGS: 00010286 [ 58.092886][ T301] RAX: 0000000000000000 RBX: ffff88814499e100 RCX: 0000000000000000 [ 58.100856][ T301] RDX: ffff8880122f9c40 RSI: ffffffff815cc9a5 RDI: fffff520001eff6a [ 58.108827][ T301] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 58.116793][ T301] R10: ffffffff815c680e R11: 0000000000000000 R12: ffff888018750f20 [ 58.124870][ T301] R13: 0000000000000000 R14: ffff888011ed7a80 R15: 0000000000000001 [ 58.132849][ T301] ? wake_up_klogd.part.0+0x8e/0xd0 [ 58.138059][ T301] ? vprintk+0x95/0x260 [ 58.142225][ T301] nf_unregister_net_hooks+0x117/0x160 [ 58.147693][ T301] arpt_unregister_table_pre_exit+0x67/0x80 [ 58.153593][ T301] ? arptable_filter_net_exit+0x20/0x20 [ 58.159149][ T301] cleanup_net+0x451/0xb10 [ 58.163572][ T301] ? ops_free_list.part.0+0x3d0/0x3d0 [ 58.168963][ T301] process_one_work+0x98d/0x1600 [ 58.173912][ T301] ? pwq_dec_nr_in_flight+0x320/0x320 [ 58.179292][ T301] ? rwlock_bug.part.0+0x90/0x90 [ 58.184229][ T301] ? _raw_spin_lock_irq+0x41/0x50 [ 58.189265][ T301] worker_thread+0x64c/0x1120 [ 58.193960][ T301] ? process_one_work+0x1600/0x1600 [ 58.199165][ T301] kthread+0x3b1/0x4a0 [ 58.203238][ T301] ? __kthread_bind_mask+0xc0/0xc0 [ 58.208352][ T301] ret_from_fork+0x1f/0x30 [ 58.217063][ T301] Kernel Offset: disabled [ 58.221992][ T301] Rebooting in 86400 seconds..