[ OK ] Started Getty on tty2. Starting Load/Save RF Kill Switch Status... [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.77' (ECDSA) to the list of known hosts. 2021/05/05 20:04:53 fuzzer started 2021/05/05 20:04:53 connecting to host at 10.128.0.169:46673 2021/05/05 20:04:53 checking machine... 2021/05/05 20:04:53 checking revisions... 2021/05/05 20:04:53 testing simple program... syzkaller login: [ 79.991279][ T8419] chnl_net:caif_netlink_parms(): no params data found [ 80.076313][ T8419] bridge0: port 1(bridge_slave_0) entered blocking state [ 80.084747][ T8419] bridge0: port 1(bridge_slave_0) entered disabled state [ 80.094132][ T8419] device bridge_slave_0 entered promiscuous mode [ 80.104958][ T8419] bridge0: port 2(bridge_slave_1) entered blocking state [ 80.114072][ T8419] bridge0: port 2(bridge_slave_1) entered disabled state [ 80.123360][ T8419] device bridge_slave_1 entered promiscuous mode [ 80.144571][ T8419] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 80.157375][ T8419] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 80.183906][ T8419] team0: Port device team_slave_0 added [ 80.192012][ T8419] team0: Port device team_slave_1 added [ 80.211607][ T8419] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 80.219032][ T8419] 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. [ 80.248142][ T8419] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 80.262698][ T8419] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 80.270462][ T8419] 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. [ 80.297559][ T8419] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 80.324816][ T8419] device hsr_slave_0 entered promiscuous mode [ 80.332439][ T8419] device hsr_slave_1 entered promiscuous mode [ 80.440257][ T8419] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 80.453137][ T8419] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 80.464131][ T8419] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 80.474455][ T8419] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 80.501375][ T8419] bridge0: port 2(bridge_slave_1) entered blocking state [ 80.508909][ T8419] bridge0: port 2(bridge_slave_1) entered forwarding state [ 80.516905][ T8419] bridge0: port 1(bridge_slave_0) entered blocking state [ 80.524115][ T8419] bridge0: port 1(bridge_slave_0) entered forwarding state [ 80.572313][ T8419] 8021q: adding VLAN 0 to HW filter on device bond0 [ 80.587569][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 80.601156][ T3158] bridge0: port 1(bridge_slave_0) entered disabled state [ 80.611646][ T3158] bridge0: port 2(bridge_slave_1) entered disabled state [ 80.622563][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 80.637333][ T8419] 8021q: adding VLAN 0 to HW filter on device team0 [ 80.648834][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 80.658799][ T4836] bridge0: port 1(bridge_slave_0) entered blocking state [ 80.666082][ T4836] bridge0: port 1(bridge_slave_0) entered forwarding state [ 80.679951][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 80.688735][ T4836] bridge0: port 2(bridge_slave_1) entered blocking state [ 80.695925][ T4836] bridge0: port 2(bridge_slave_1) entered forwarding state [ 80.718588][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 80.727832][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 80.750185][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 80.761242][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 80.771645][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 80.781768][ T8419] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 80.801920][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 80.810622][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 80.824317][ T8419] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 80.853280][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 80.872925][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 80.882945][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 80.891381][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 80.901928][ T8419] device veth0_vlan entered promiscuous mode [ 80.916892][ T8419] device veth1_vlan entered promiscuous mode [ 80.941915][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 80.951911][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 80.961659][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 80.973744][ T8419] device veth0_macvtap entered promiscuous mode [ 80.985522][ T4836] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 80.996304][ T8419] device veth1_macvtap entered promiscuous mode [ 81.018640][ T8419] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 81.027506][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 81.036874][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 81.051083][ T8419] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 81.058669][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 81.067709][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 81.081171][ T8419] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.090555][ T8419] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.101108][ T8419] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.112411][ T8419] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 81.212797][ T129] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.227067][ T129] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.256848][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 81.278576][ T129] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 81.287949][ T129] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 81.299865][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/05 20:04:56 building call list... [ 81.952149][ T9] ------------[ cut here ]------------ [ 81.957944][ T9] hook not found, pf 3 num 0 [ 81.958602][ T9] WARNING: CPU: 1 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 81.982914][ T9] Modules linked in: [ 81.987156][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 82.003500][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.016761][ T9] Workqueue: netns cleanup_net [ 82.022550][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 82.029010][ T9] 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 [ 82.056527][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 82.064993][ T9] RAX: 0000000000000000 RBX: ffff888023cba100 RCX: 0000000000000000 [ 82.075562][ T9] RDX: ffff888011d78000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 82.085051][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 82.095355][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801ba70f20 [ 82.104594][ T9] R13: 0000000000000000 R14: ffff8880166bc180 R15: 0000000000000001 [ 82.117208][ T9] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 82.127631][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.140264][ T9] CR2: 00007fa44dacf000 CR3: 0000000012dc9000 CR4: 00000000001506e0 [ 82.148753][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.158517][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.170399][ T9] Call Trace: [ 82.174040][ T9] nf_unregister_net_hooks+0x117/0x160 [ 82.182806][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 82.189111][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 82.197760][ T9] cleanup_net+0x451/0xb10 [ 82.205337][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 82.215058][ T9] process_one_work+0x98d/0x1600 [ 82.222726][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 82.228485][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 82.235742][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 82.243962][ T9] worker_thread+0x64c/0x1120 [ 82.248812][ T9] ? process_one_work+0x1600/0x1600 [ 82.256214][ T9] kthread+0x3b1/0x4a0 [ 82.263049][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 82.268431][ T9] ret_from_fork+0x1f/0x30 [ 82.275666][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 82.282285][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 82.290653][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.301293][ T9] Workqueue: netns cleanup_net [ 82.306262][ T9] Call Trace: [ 82.309539][ T9] dump_stack+0x141/0x1d7 [ 82.314019][ T9] panic+0x306/0x73d [ 82.317947][ T9] ? __warn_printk+0xf3/0xf3 [ 82.322663][ T9] ? __warn.cold+0x1a/0x44 [ 82.327177][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 82.332904][ T9] __warn.cold+0x35/0x44 [ 82.337322][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 82.343073][ T9] report_bug+0x1bd/0x210 [ 82.347405][ T9] handle_bug+0x3c/0x60 [ 82.351560][ T9] exc_invalid_op+0x14/0x40 [ 82.356060][ T9] asm_exc_invalid_op+0x12/0x20 [ 82.360912][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 82.367517][ T9] 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 [ 82.387399][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 82.393471][ T9] RAX: 0000000000000000 RBX: ffff888023cba100 RCX: 0000000000000000 [ 82.401453][ T9] RDX: ffff888011d78000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 82.409704][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 82.417670][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801ba70f20 [ 82.425638][ T9] R13: 0000000000000000 R14: ffff8880166bc180 R15: 0000000000000001 [ 82.433623][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 82.438845][ T9] ? vprintk+0x95/0x260 [ 82.443024][ T9] nf_unregister_net_hooks+0x117/0x160 [ 82.449551][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 82.455533][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 82.461341][ T9] cleanup_net+0x451/0xb10 [ 82.465947][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 82.471523][ T9] process_one_work+0x98d/0x1600 [ 82.476469][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 82.481940][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 82.487236][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 82.492272][ T9] worker_thread+0x64c/0x1120 [ 82.496970][ T9] ? process_one_work+0x1600/0x1600 [ 82.502187][ T9] kthread+0x3b1/0x4a0 [ 82.506703][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 82.511833][ T9] ret_from_fork+0x1f/0x30 [ 82.517934][ T9] Kernel Offset: disabled [ 82.522644][ T9] Rebooting in 86400 seconds..