[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ 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 Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.122' (ECDSA) to the list of known hosts. 2021/04/27 07:52:17 fuzzer started 2021/04/27 07:52:17 connecting to host at 10.128.0.169:35497 2021/04/27 07:52:17 checking machine... 2021/04/27 07:52:17 checking revisions... 2021/04/27 07:52:17 testing simple program... syzkaller login: [ 72.923368][ T8479] chnl_net:caif_netlink_parms(): no params data found [ 72.979794][ T8479] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.988606][ T8479] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.997397][ T8479] device bridge_slave_0 entered promiscuous mode [ 73.007947][ T8479] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.015857][ T8479] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.023756][ T8479] device bridge_slave_1 entered promiscuous mode [ 73.045567][ T8479] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.058162][ T8479] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.081496][ T8479] team0: Port device team_slave_0 added [ 73.089682][ T8479] team0: Port device team_slave_1 added [ 73.109043][ T8479] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.116468][ T8479] 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. [ 73.143890][ T8479] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.157721][ T8479] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.164935][ T8479] 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. [ 73.191949][ T8479] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.220974][ T8479] device hsr_slave_0 entered promiscuous mode [ 73.227859][ T8479] device hsr_slave_1 entered promiscuous mode [ 73.332718][ T8479] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.345253][ T8479] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.356692][ T8479] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.367354][ T8479] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.394776][ T8479] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.402680][ T8479] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.411957][ T8479] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.419620][ T8479] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.470550][ T8479] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.487295][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.499840][ T36] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.509921][ T36] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.519741][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.533994][ T8479] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.547396][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.556885][ T3160] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.564579][ T3160] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.577517][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.587581][ T36] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.595721][ T36] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.617995][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.634936][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.643177][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.653032][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.667733][ T8479] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 73.680227][ T8479] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.690929][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.711410][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.719792][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.736727][ T8479] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.758750][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.781935][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.790813][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.801038][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 73.813268][ T8479] device veth0_vlan entered promiscuous mode [ 73.827080][ T8479] device veth1_vlan entered promiscuous mode [ 73.852288][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 73.861320][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 73.871952][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 73.885235][ T8479] device veth0_macvtap entered promiscuous mode [ 73.897697][ T8479] device veth1_macvtap entered promiscuous mode [ 73.907822][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 73.927241][ T8479] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.939930][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 73.951082][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 73.963660][ T8479] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.973228][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.982413][ T3160] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 73.996956][ T8479] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.007054][ T8479] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.017939][ T8479] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.028114][ T8479] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.136317][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.165471][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.191994][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.207301][ T217] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.216507][ T217] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.230266][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/27 07:52:20 building call list... executing program [ 74.901233][ T9] ------------[ cut here ]------------ [ 74.915450][ T9] hook not found, pf 3 num 0 [ 74.916049][ T9] WARNING: CPU: 0 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 74.954047][ T9] Modules linked in: [ 74.958266][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-next-20210427-syzkaller #0 [ 74.968797][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.980508][ T9] Workqueue: netns cleanup_net [ 74.989930][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 74.996857][ 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 49 6e 8a e8 18 35 8a 01 <0f> 0b e9 e5 00 00 00 e8 c9 16 2d fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.020303][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 75.027088][ T9] RAX: 0000000000000000 RBX: ffff888144707500 RCX: 0000000000000000 [ 75.037151][ T9] RDX: ffff888012380000 RSI: ffffffff815cc9f5 RDI: fffff5200019cf6a [ 75.046132][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.056683][ T9] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff888019a78f20 [ 75.066665][ T9] R13: 0000000000000000 R14: ffff88801e258e00 R15: 0000000000000001 [ 75.077453][ T9] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 75.088571][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.097742][ T9] CR2: 00007fc4c803f138 CR3: 0000000021eb8000 CR4: 00000000001506f0 [ 75.106554][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.117214][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.125921][ T9] Call Trace: [ 75.129245][ T9] nf_unregister_net_hooks+0x117/0x160 [ 75.136855][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.142993][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 75.152708][ T9] cleanup_net+0x451/0xb10 [ 75.159050][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.165308][ T9] process_one_work+0x98d/0x1600 [ 75.170304][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.178370][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 75.183352][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 75.188996][ T9] worker_thread+0x64c/0x1120 [ 75.194098][ T9] ? process_one_work+0x1600/0x1600 [ 75.202141][ T9] kthread+0x3b1/0x4a0 [ 75.207910][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 75.213145][ T9] ret_from_fork+0x1f/0x30 [ 75.219530][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 75.227014][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-next-20210427-syzkaller #0 [ 75.236613][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.246785][ T9] Workqueue: netns cleanup_net [ 75.251853][ T9] Call Trace: [ 75.255144][ T9] dump_stack+0x141/0x1d7 [ 75.259508][ T9] panic+0x306/0x73d [ 75.263449][ T9] ? __warn_printk+0xf3/0xf3 [ 75.268201][ T9] ? __warn.cold+0x1a/0x44 [ 75.272670][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.278532][ T9] __warn.cold+0x35/0x44 [ 75.282805][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.288639][ T9] report_bug+0x1bd/0x210 [ 75.293006][ T9] handle_bug+0x3c/0x60 [ 75.297363][ T9] exc_invalid_op+0x14/0x40 [ 75.302064][ T9] asm_exc_invalid_op+0x12/0x20 [ 75.307028][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.313489][ 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 49 6e 8a e8 18 35 8a 01 <0f> 0b e9 e5 00 00 00 e8 c9 16 2d fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.333206][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 75.339298][ T9] RAX: 0000000000000000 RBX: ffff888144707500 RCX: 0000000000000000 [ 75.347374][ T9] RDX: ffff888012380000 RSI: ffffffff815cc9f5 RDI: fffff5200019cf6a [ 75.356140][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.364233][ T9] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff888019a78f20 [ 75.372392][ T9] R13: 0000000000000000 R14: ffff88801e258e00 R15: 0000000000000001 [ 75.380570][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 75.386278][ T9] ? vprintk+0x95/0x260 [ 75.390515][ T9] nf_unregister_net_hooks+0x117/0x160 [ 75.396264][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.402524][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 75.408222][ T9] cleanup_net+0x451/0xb10 [ 75.412926][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.418787][ T9] process_one_work+0x98d/0x1600 [ 75.423863][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.430404][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 75.435800][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 75.441283][ T9] worker_thread+0x64c/0x1120 [ 75.446124][ T9] ? process_one_work+0x1600/0x1600 [ 75.451689][ T9] kthread+0x3b1/0x4a0 [ 75.455880][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 75.461009][ T9] ret_from_fork+0x1f/0x30 [ 75.467070][ T9] Kernel Offset: disabled [ 75.471874][ T9] Rebooting in 86400 seconds..