WARNING in __nf_unregister_net_hook wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 ------------[ cut here ]------------ hook not found, pf 3 num 0 WARNING: CPU: 1 PID: 100 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x4ee/0x640 net/netfilter/core.c:480 Modules linked in: CPU: 1 PID: 100 Comm: kworker/u4:3 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+0x4ee/0x640 net/netfilter/core.c:480 Code: c6 05 89 01 34 05 01 43 8a 04 2e 84 c0 0f 85 3a 01 00 00 48 8b 04 24 8b 10 48 c7 c7 00 69 d6 8a 44 89 e6 31 c0 e8 f2 88 78 f9 <0f> 0b e9 08 ff ff ff 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 0f 8c 3d RSP: 0018:ffffc900011bfbd8 EFLAGS: 00010246 RAX: 22efb2effa442700 RBX: ffff88801dfa1180 RCX: 22efb2effa442700 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffff88801c4e0f20 R08: ffffffff81603612 R09: ffffed10173e3f24 R10: ffffed10173e3f24 R11: 0000000000000000 R12: 0000000000000003 R13: dffffc0000000000 R14: 1ffff1100471ee03 R15: ffff88801c4e0000 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f34c163d000 CR3: 0000000025cdf000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nf_unregister_net_hook net/netfilter/core.c:498 [inline] nf_unregister_net_hooks+0xe7/0x150 net/netfilter/core.c:576 ops_pre_exit_list net/core/net_namespace.c:165 [inline] cleanup_net+0x5b8/0xbd0 net/core/net_namespace.c:583 process_one_work+0x789/0xfd0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.105' (ECDSA) to the list of known hosts. 2021/05/03 17:04:41 fuzzer started 2021/05/03 17:04:41 connecting to host at 10.128.0.169:40541 2021/05/03 17:04:41 checking machine... 2021/05/03 17:04:41 checking revisions... 2021/05/03 17:04:41 testing simple program... syzkaller login: [ 58.105860][ T8404] chnl_net:caif_netlink_parms(): no params data found [ 58.162415][ T8404] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.171786][ T8404] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.181053][ T8404] device bridge_slave_0 entered promiscuous mode [ 58.193348][ T8404] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.201632][ T8404] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.210749][ T8404] device bridge_slave_1 entered promiscuous mode [ 58.233737][ T8404] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.246638][ T8404] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.271232][ T8404] team0: Port device team_slave_0 added [ 58.279561][ T8404] team0: Port device team_slave_1 added [ 58.298580][ T8404] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 58.305862][ T8404] 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. [ 58.332432][ T8404] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 58.345087][ T8404] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 58.353413][ T8404] 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. [ 58.380161][ T8404] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 58.405565][ T8404] device hsr_slave_0 entered promiscuous mode [ 58.412969][ T8404] device hsr_slave_1 entered promiscuous mode [ 58.515785][ T8404] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.526501][ T8404] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.536672][ T8404] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.548469][ T8404] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.574682][ T8404] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.583080][ T8404] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.594051][ T8404] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.601989][ T8404] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.645525][ T8404] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.662776][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.675130][ T35] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.685490][ T35] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.695457][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 58.710361][ T8404] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.722540][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.731611][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.738898][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.758740][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.767742][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.775116][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.784511][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 58.797916][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 58.809479][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 58.827613][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 58.836907][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 58.846804][ T8404] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 58.866941][ T8623] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 58.874526][ T8623] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 58.890519][ T8404] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 58.909665][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 58.931529][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 58.943273][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 58.952415][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 58.963547][ T8404] device veth0_vlan entered promiscuous mode [ 58.977217][ T8404] device veth1_vlan entered promiscuous mode [ 59.003168][ T8623] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 59.013069][ T8623] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 59.025902][ T8623] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 59.041893][ T8404] device veth0_macvtap entered promiscuous mode [ 59.053012][ T8404] device veth1_macvtap entered promiscuous mode [ 59.070159][ T8623] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 59.080949][ T8404] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 59.090547][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 59.100814][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 59.113425][ T8404] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 59.122748][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 59.131426][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 59.144100][ T8404] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.161377][ T8404] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.171097][ T8404] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.180789][ T8404] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.272047][ T100] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 59.280415][ T100] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 59.305183][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 59.322981][ T100] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 59.334908][ T100] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 59.344693][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/03 17:04:44 building call list... executing program [ 59.945810][ T100] ------------[ cut here ]------------ [ 59.952520][ T100] hook not found, pf 3 num 0 [ 59.953276][ T100] WARNING: CPU: 1 PID: 100 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x4ee/0x640 [ 59.974626][ T100] Modules linked in: [ 59.981934][ T100] CPU: 1 PID: 100 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 59.992133][ T100] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.003467][ T100] Workqueue: netns cleanup_net [ 60.010708][ T100] RIP: 0010:__nf_unregister_net_hook+0x4ee/0x640 [ 60.018195][ T100] Code: c6 05 89 01 34 05 01 43 8a 04 2e 84 c0 0f 85 3a 01 00 00 48 8b 04 24 8b 10 48 c7 c7 00 69 d6 8a 44 89 e6 31 c0 e8 f2 88 78 f9 <0f> 0b e9 08 ff ff ff 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 0f 8c 3d [ 60.040532][ T100] RSP: 0018:ffffc900011bfbd8 EFLAGS: 00010246 [ 60.047990][ T100] RAX: 22efb2effa442700 RBX: ffff88801dfa1180 RCX: 22efb2effa442700 [ 60.055996][ T100] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 60.065813][ T100] RBP: ffff88801c4e0f20 R08: ffffffff81603612 R09: ffffed10173e3f24 [ 60.075607][ T100] R10: ffffed10173e3f24 R11: 0000000000000000 R12: 0000000000000003 [ 60.087551][ T100] R13: dffffc0000000000 R14: 1ffff1100471ee03 R15: ffff88801c4e0000 [ 60.095922][ T100] FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 60.106777][ T100] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.113484][ T100] CR2: 00007f34c163d000 CR3: 0000000025cdf000 CR4: 00000000001506e0 [ 60.124063][ T100] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.143185][ T100] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.152673][ T100] Call Trace: [ 60.158555][ T100] nf_unregister_net_hooks+0xe7/0x150 [ 60.165140][ T100] cleanup_net+0x5b8/0xbd0 [ 60.173064][ T100] process_one_work+0x789/0xfd0 [ 60.179789][ T100] worker_thread+0xac1/0x1300 [ 60.184950][ T100] ? rcu_lock_release+0x20/0x20 [ 60.192634][ T100] kthread+0x39a/0x3c0 [ 60.201066][ T100] ? rcu_lock_release+0x20/0x20 [ 60.206243][ T100] ? kthread_blkcg+0xd0/0xd0 [ 60.212748][ T100] ret_from_fork+0x1f/0x30 [ 60.218901][ T100] Kernel panic - not syncing: panic_on_warn set ... [ 60.225613][ T100] CPU: 1 PID: 100 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 60.234138][ T100] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.244420][ T100] Workqueue: netns cleanup_net [ 60.249802][ T100] Call Trace: [ 60.253178][ T100] dump_stack+0x125/0x19e [ 60.261153][ T100] panic+0x291/0x800 [ 60.265189][ T100] ? __warn+0x13e/0x270 [ 60.269683][ T100] __warn+0x26a/0x270 [ 60.273700][ T100] ? __nf_unregister_net_hook+0x4ee/0x640 [ 60.279461][ T100] ? __nf_unregister_net_hook+0x4ee/0x640 [ 60.285742][ T100] report_bug+0x1b1/0x2e0 [ 60.290120][ T100] handle_bug+0x3d/0x70 [ 60.294430][ T100] exc_invalid_op+0x16/0x40 [ 60.299172][ T100] asm_exc_invalid_op+0x12/0x20 [ 60.304238][ T100] RIP: 0010:__nf_unregister_net_hook+0x4ee/0x640 [ 60.310665][ T100] Code: c6 05 89 01 34 05 01 43 8a 04 2e 84 c0 0f 85 3a 01 00 00 48 8b 04 24 8b 10 48 c7 c7 00 69 d6 8a 44 89 e6 31 c0 e8 f2 88 78 f9 <0f> 0b e9 08 ff ff ff 48 8b 0c 24 80 e1 07 80 c1 03 38 c1 0f 8c 3d [ 60.330767][ T100] RSP: 0018:ffffc900011bfbd8 EFLAGS: 00010246 [ 60.337120][ T100] RAX: 22efb2effa442700 RBX: ffff88801dfa1180 RCX: 22efb2effa442700 [ 60.345099][ T100] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 60.353081][ T100] RBP: ffff88801c4e0f20 R08: ffffffff81603612 R09: ffffed10173e3f24 [ 60.361154][ T100] R10: ffffed10173e3f24 R11: 0000000000000000 R12: 0000000000000003 [ 60.369160][ T100] R13: dffffc0000000000 R14: 1ffff1100471ee03 R15: ffff88801c4e0000 [ 60.377415][ T100] ? wake_up_klogd+0xb2/0xf0 [ 60.382031][ T100] ? __nf_unregister_net_hook+0x4ee/0x640 [ 60.387795][ T100] nf_unregister_net_hooks+0xe7/0x150 [ 60.393316][ T100] cleanup_net+0x5b8/0xbd0 [ 60.397959][ T100] process_one_work+0x789/0xfd0 [ 60.402851][ T100] worker_thread+0xac1/0x1300 [ 60.407569][ T100] ? rcu_lock_release+0x20/0x20 [ 60.412699][ T100] kthread+0x39a/0x3c0 [ 60.416804][ T100] ? rcu_lock_release+0x20/0x20 [ 60.421751][ T100] ? kthread_blkcg+0xd0/0xd0 [ 60.426355][ T100] ret_from_fork+0x1f/0x30 [ 60.432110][ T100] Kernel Offset: disabled [ 60.436669][ T100] Rebooting in 86400 seconds..