[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.104' (ECDSA) to the list of known hosts. 2021/04/30 22:26:53 fuzzer started 2021/04/30 22:26:53 connecting to host at 10.128.0.169:46705 2021/04/30 22:26:53 checking machine... 2021/04/30 22:26:53 checking revisions... 2021/04/30 22:26:53 testing simple program... syzkaller login: [ 73.069944][ T8423] chnl_net:caif_netlink_parms(): no params data found [ 73.120137][ T8423] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.128893][ T8423] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.138276][ T8423] device bridge_slave_0 entered promiscuous mode [ 73.149391][ T8423] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.157039][ T8423] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.164746][ T8423] device bridge_slave_1 entered promiscuous mode [ 73.185963][ T8423] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.199149][ T8423] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.222817][ T8423] team0: Port device team_slave_0 added [ 73.230372][ T8423] team0: Port device team_slave_1 added [ 73.249861][ T8423] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.257564][ T8423] 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. [ 73.285324][ T8423] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.299542][ T8423] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.307934][ T8423] 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. [ 73.335674][ T8423] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.364063][ T8423] device hsr_slave_0 entered promiscuous mode [ 73.371062][ T8423] device hsr_slave_1 entered promiscuous mode [ 73.478188][ T8423] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.490432][ T8423] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.501343][ T8423] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.512803][ T8423] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.551403][ T8423] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.558793][ T8423] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.567264][ T8423] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.574508][ T8423] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.622079][ T8423] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.635600][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.649714][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.658384][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.669802][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.682977][ T8423] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.694646][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.703068][ T3148] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.710302][ T3148] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.722973][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.732365][ T36] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.739622][ T36] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.759986][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.769526][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.790375][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.799885][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.808984][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.822150][ T8423] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.841888][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.849556][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.864610][ T8423] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.886804][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.907460][ T8423] device veth0_vlan entered promiscuous mode [ 73.917581][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.926027][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.935001][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 73.949661][ T8423] device veth1_vlan entered promiscuous mode [ 73.972523][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 73.981710][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 73.990902][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.003858][ T8423] device veth0_macvtap entered promiscuous mode [ 74.014535][ T8423] device veth1_macvtap entered promiscuous mode [ 74.029086][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.044547][ T8423] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.055182][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.064770][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.077574][ T8423] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.085064][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.094867][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.107127][ T8423] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.116503][ T8423] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.125508][ T8423] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.134543][ T8423] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.239278][ T182] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.255841][ T182] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.275727][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.297344][ T182] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.305642][ T182] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.315971][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/04/30 22:26:56 building call list... [ 74.991412][ T182] ------------[ cut here ]------------ [ 75.004030][ T182] hook not found, pf 3 num 0 [ 75.004678][ T182] WARNING: CPU: 0 PID: 182 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 75.020377][ T182] Modules linked in: [ 75.024746][ T182] CPU: 0 PID: 182 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 75.035546][ T182] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.048380][ T182] Workqueue: netns cleanup_net [ 75.055684][ T182] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.066162][ T182] 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 78 6d 8a e8 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.086951][ T182] RSP: 0018:ffffc900016bfbc0 EFLAGS: 00010286 [ 75.093068][ T182] RAX: 0000000000000000 RBX: ffff888147a0c500 RCX: 0000000000000000 [ 75.102563][ T182] RDX: ffff888012869c40 RSI: ffffffff815c8ba5 RDI: fffff520002d7f6a [ 75.112299][ T182] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.122832][ T182] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888018d48f20 [ 75.131692][ T182] R13: 0000000000000000 R14: ffff888012199780 R15: 0000000000000001 [ 75.140394][ T182] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 75.150058][ T182] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.157552][ T182] CR2: 00007fa1ece16000 CR3: 0000000012de2000 CR4: 00000000001506f0 [ 75.165554][ T182] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.174575][ T182] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.183381][ T182] Call Trace: [ 75.187367][ T182] nf_unregister_net_hooks+0x117/0x160 [ 75.193044][ T182] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.200831][ T182] ? arptable_filter_net_exit+0x20/0x20 [ 75.207353][ T182] cleanup_net+0x451/0xb10 [ 75.211859][ T182] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.218598][ T182] process_one_work+0x98d/0x1600 [ 75.223845][ T182] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.230342][ T182] ? rwlock_bug.part.0+0x90/0x90 [ 75.235456][ T182] ? _raw_spin_lock_irq+0x41/0x50 [ 75.241952][ T182] worker_thread+0x64c/0x1120 [ 75.247748][ T182] ? process_one_work+0x1600/0x1600 [ 75.252988][ T182] kthread+0x3b1/0x4a0 [ 75.258185][ T182] ? __kthread_bind_mask+0xc0/0xc0 [ 75.263514][ T182] ret_from_fork+0x1f/0x30 [ 75.269428][ T182] Kernel panic - not syncing: panic_on_warn set ... [ 75.276031][ T182] CPU: 0 PID: 182 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 75.284365][ T182] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.294431][ T182] Workqueue: netns cleanup_net [ 75.299239][ T182] Call Trace: [ 75.302532][ T182] dump_stack+0x141/0x1d7 [ 75.306880][ T182] panic+0x306/0x73d [ 75.310792][ T182] ? __warn_printk+0xf3/0xf3 [ 75.315417][ T182] ? __warn.cold+0x1a/0x44 [ 75.320024][ T182] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.325984][ T182] __warn.cold+0x35/0x44 [ 75.330275][ T182] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.336022][ T182] report_bug+0x1bd/0x210 [ 75.340374][ T182] handle_bug+0x3c/0x60 [ 75.344639][ T182] exc_invalid_op+0x14/0x40 [ 75.349178][ T182] asm_exc_invalid_op+0x12/0x20 [ 75.354049][ T182] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.360494][ T182] 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 78 6d 8a e8 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.380109][ T182] RSP: 0018:ffffc900016bfbc0 EFLAGS: 00010286 [ 75.386374][ T182] RAX: 0000000000000000 RBX: ffff888147a0c500 RCX: 0000000000000000 [ 75.394365][ T182] RDX: ffff888012869c40 RSI: ffffffff815c8ba5 RDI: fffff520002d7f6a [ 75.402376][ T182] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.410361][ T182] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888018d48f20 [ 75.418345][ T182] R13: 0000000000000000 R14: ffff888012199780 R15: 0000000000000001 [ 75.426444][ T182] ? wake_up_klogd.part.0+0x8e/0xd0 [ 75.431688][ T182] ? vprintk+0x95/0x260 [ 75.435900][ T182] nf_unregister_net_hooks+0x117/0x160 [ 75.441384][ T182] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.447297][ T182] ? arptable_filter_net_exit+0x20/0x20 [ 75.452874][ T182] cleanup_net+0x451/0xb10 [ 75.457313][ T182] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.462907][ T182] process_one_work+0x98d/0x1600 [ 75.467872][ T182] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.473265][ T182] ? rwlock_bug.part.0+0x90/0x90 [ 75.478220][ T182] ? _raw_spin_lock_irq+0x41/0x50 [ 75.483530][ T182] worker_thread+0x64c/0x1120 [ 75.488240][ T182] ? process_one_work+0x1600/0x1600 [ 75.493457][ T182] kthread+0x3b1/0x4a0 [ 75.497562][ T182] ? __kthread_bind_mask+0xc0/0xc0 [ 75.502716][ T182] ret_from_fork+0x1f/0x30 [ 75.508423][ T182] Kernel Offset: disabled [ 75.512997][ T182] Rebooting in 86400 seconds..