[ 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 '10.128.1.124' (ECDSA) to the list of known hosts. 2021/04/28 13:51:46 fuzzer started 2021/04/28 13:51:46 connecting to host at 10.128.0.169:34341 2021/04/28 13:51:46 checking machine... 2021/04/28 13:51:46 checking revisions... 2021/04/28 13:51:46 testing simple program... syzkaller login: [ 71.889967][ T8393] chnl_net:caif_netlink_parms(): no params data found [ 71.945853][ T8393] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.954755][ T8393] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.963244][ T8393] device bridge_slave_0 entered promiscuous mode [ 71.975126][ T8393] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.982798][ T8393] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.991696][ T8393] device bridge_slave_1 entered promiscuous mode [ 72.014104][ T8393] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.026268][ T8393] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.049995][ T8393] team0: Port device team_slave_0 added [ 72.058040][ T8393] team0: Port device team_slave_1 added [ 72.077358][ T8393] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.084838][ T8393] 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. [ 72.112789][ T8393] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.127754][ T8393] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.136257][ T8393] 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. [ 72.164113][ T8393] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.191552][ T8393] device hsr_slave_0 entered promiscuous mode [ 72.198845][ T8393] device hsr_slave_1 entered promiscuous mode [ 72.306135][ T8393] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 72.322588][ T8393] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 72.332359][ T8393] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 72.346110][ T8393] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.373628][ T8393] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.381186][ T8393] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.389918][ T8393] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.397393][ T8393] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.447187][ T8393] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.460418][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.473078][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.484625][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.493107][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 72.508968][ T8393] 8021q: adding VLAN 0 to HW filter on device team0 [ 72.521399][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 72.531992][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.540650][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.553779][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 72.562570][ T4132] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.570365][ T4132] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.597299][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 72.606813][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 72.616426][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 72.626717][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 72.639488][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 72.651402][ T8393] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 72.672059][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 72.680666][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 72.696292][ T8393] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 72.716164][ T8612] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 72.740121][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 72.749368][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 72.759628][ T4132] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 72.771958][ T8393] device veth0_vlan entered promiscuous mode [ 72.785569][ T8393] device veth1_vlan entered promiscuous mode [ 72.808433][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 72.817758][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 72.826987][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 72.841140][ T8393] device veth0_macvtap entered promiscuous mode [ 72.852306][ T8393] device veth1_macvtap entered promiscuous mode [ 72.865407][ T2935] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 72.881591][ T8393] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 72.890221][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 72.900430][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 72.918347][ T8393] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 72.927891][ T8612] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 72.938575][ T8612] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 72.950838][ T8393] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.962092][ T8393] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.972857][ T8393] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.987029][ T8393] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.085714][ T207] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.095637][ T207] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.112910][ T8614] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 73.139094][ T207] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.156897][ T207] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.170388][ T8614] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/04/28 13:51:49 building call list... [ 73.918291][ T9] ------------[ cut here ]------------ [ 73.925348][ T9] hook not found, pf 3 num 0 [ 73.926193][ T9] WARNING: CPU: 0 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 73.947386][ T9] Modules linked in: [ 73.951756][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-rc7-syzkaller #0 [ 73.962686][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.976574][ T9] Workqueue: netns cleanup_net [ 73.982112][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 73.990436][ 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 00 68 6c 8a e8 2e 37 8a 01 <0f> 0b e9 e5 00 00 00 e8 f9 34 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 74.013036][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 74.020308][ T9] RAX: 0000000000000000 RBX: ffff8880216a7d00 RCX: 0000000000000000 [ 74.031148][ T9] RDX: ffff888011550000 RSI: ffffffff815c5205 RDI: fffff5200019cf6a [ 74.040606][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 74.051687][ T9] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888018f58f20 [ 74.061658][ T9] R13: 0000000000000000 R14: ffff8880200f6880 R15: 0000000000000001 [ 74.073200][ T9] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 74.086133][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.093016][ T9] CR2: 00007efddd4de000 CR3: 0000000021bc7000 CR4: 00000000001506e0 [ 74.103071][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.116216][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.125765][ T9] Call Trace: [ 74.129196][ T9] nf_unregister_net_hooks+0x117/0x160 [ 74.137710][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 74.144602][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 74.150456][ T9] cleanup_net+0x451/0xb10 [ 74.158004][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 74.164563][ T9] process_one_work+0x98d/0x1600 [ 74.170360][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 74.179148][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 74.189053][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 74.196664][ T9] worker_thread+0x64c/0x1120 [ 74.201583][ T9] ? process_one_work+0x1600/0x1600 [ 74.208555][ T9] kthread+0x3b1/0x4a0 [ 74.212768][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 74.221597][ T9] ret_from_fork+0x1f/0x30 [ 74.227581][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 74.234412][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-rc7-syzkaller #0 [ 74.242929][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.253680][ T9] Workqueue: netns cleanup_net [ 74.258471][ T9] Call Trace: [ 74.261758][ T9] dump_stack+0x141/0x1d7 [ 74.266183][ T9] panic+0x306/0x73d [ 74.270184][ T9] ? __warn_printk+0xf3/0xf3 [ 74.274796][ T9] ? __warn.cold+0x1a/0x44 [ 74.279338][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 74.285236][ T9] __warn.cold+0x35/0x44 [ 74.289567][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 74.295619][ T9] report_bug+0x1bd/0x210 [ 74.299957][ T9] handle_bug+0x3c/0x60 [ 74.304300][ T9] exc_invalid_op+0x14/0x40 [ 74.308807][ T9] asm_exc_invalid_op+0x12/0x20 [ 74.313659][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 74.319995][ 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 00 68 6c 8a e8 2e 37 8a 01 <0f> 0b e9 e5 00 00 00 e8 f9 34 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 74.341076][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 74.347161][ T9] RAX: 0000000000000000 RBX: ffff8880216a7d00 RCX: 0000000000000000 [ 74.355246][ T9] RDX: ffff888011550000 RSI: ffffffff815c5205 RDI: fffff5200019cf6a [ 74.363847][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 74.372091][ T9] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888018f58f20 [ 74.380293][ T9] R13: 0000000000000000 R14: ffff8880200f6880 R15: 0000000000000001 [ 74.388646][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 74.393960][ T9] ? vprintk_func+0x95/0x1e0 [ 74.398952][ T9] nf_unregister_net_hooks+0x117/0x160 [ 74.404703][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 74.410693][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 74.416255][ T9] cleanup_net+0x451/0xb10 [ 74.421033][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 74.426510][ T9] process_one_work+0x98d/0x1600 [ 74.431476][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 74.437205][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 74.442461][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 74.447605][ T9] worker_thread+0x64c/0x1120 [ 74.452386][ T9] ? process_one_work+0x1600/0x1600 [ 74.457937][ T9] kthread+0x3b1/0x4a0 [ 74.462355][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 74.467476][ T9] ret_from_fork+0x1f/0x30 [ 74.472158][ T9] Kernel Offset: disabled [ 74.476759][ T9] Rebooting in 86400 seconds..