[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.9' (ECDSA) to the list of known hosts. 2021/05/03 17:21:20 fuzzer started 2021/05/03 17:21:20 connecting to host at 10.128.0.169:34999 2021/05/03 17:21:20 checking machine... 2021/05/03 17:21:20 checking revisions... 2021/05/03 17:21:20 testing simple program... syzkaller login: [ 73.607630][ T8423] chnl_net:caif_netlink_parms(): no params data found [ 73.725950][ T8423] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.734571][ T8423] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.743102][ T8423] device bridge_slave_0 entered promiscuous mode [ 73.752498][ T8423] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.759715][ T8423] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.770413][ T8423] device bridge_slave_1 entered promiscuous mode [ 73.793854][ T8423] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.805277][ T8423] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.830034][ T8423] team0: Port device team_slave_0 added [ 73.838351][ T8423] team0: Port device team_slave_1 added [ 73.857517][ T8423] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.864924][ 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. [ 73.892666][ T8423] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.905688][ T8423] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.913884][ 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. [ 73.940393][ T8423] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.968033][ T8423] device hsr_slave_0 entered promiscuous mode [ 73.974956][ T8423] device hsr_slave_1 entered promiscuous mode [ 74.080225][ T8423] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.093781][ T8423] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.104376][ T8423] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.114251][ T8423] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 74.144303][ T8423] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.151725][ T8423] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.159791][ T8423] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.167093][ T8423] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.214388][ T8423] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.228454][ T4849] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.239735][ T4849] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.249438][ T4849] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.258994][ T4849] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.273312][ T8423] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.287079][ T4849] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.297555][ T4849] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.305237][ T4849] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.321748][ T4849] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.336329][ T4849] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.343463][ T4849] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.367950][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.376691][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.385956][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.394865][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.408468][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.420156][ T8423] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.439288][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.447490][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.461473][ T8423] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.481587][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.503541][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.514282][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.522854][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.536191][ T8423] device veth0_vlan entered promiscuous mode [ 74.548702][ T8423] device veth1_vlan entered promiscuous mode [ 74.569404][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.578854][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.587867][ T3166] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.601089][ T8423] device veth0_macvtap entered promiscuous mode [ 74.613833][ T8423] device veth1_macvtap entered promiscuous mode [ 74.635796][ T8423] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.643985][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.653117][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.665756][ T8423] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.673802][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.682541][ T4040] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.695318][ T8423] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.713377][ T8423] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.722565][ T8423] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.733086][ T8423] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 74.844330][ T25] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.859507][ T25] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.877388][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.895926][ T25] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.906656][ T25] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.916175][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/03 17:21:23 building call list... [ 75.476150][ T25] ------------[ cut here ]------------ [ 75.484696][ T25] hook not found, pf 3 num 0 [ 75.485459][ T25] WARNING: CPU: 0 PID: 25 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 75.504027][ T25] Modules linked in: [ 75.508040][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 75.519117][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.531309][ T25] Workqueue: netns cleanup_net [ 75.536181][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.543808][ T25] 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 80 5a 8a 01 <0f> 0b e9 e5 00 00 00 e8 99 46 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.564541][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 75.571807][ T25] RAX: 0000000000000000 RBX: ffff888147416400 RCX: 0000000000000000 [ 75.580010][ T25] RDX: ffff888011fab880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 75.589552][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.598339][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88802de30f20 [ 75.609698][ T25] R13: 0000000000000000 R14: ffff888012132000 R15: 0000000000000001 [ 75.618584][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 75.627975][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.634835][ T25] CR2: 00007f364db18000 CR3: 0000000019bd9000 CR4: 00000000001506f0 [ 75.643160][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.651536][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.660000][ T25] Call Trace: [ 75.666866][ T25] nf_unregister_net_hooks+0x117/0x160 [ 75.672825][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.678965][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 75.686217][ T25] cleanup_net+0x451/0xb10 [ 75.690773][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.697299][ T25] process_one_work+0x98d/0x1600 [ 75.703853][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.709656][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 75.715869][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 75.721995][ T25] worker_thread+0x64c/0x1120 [ 75.727089][ T25] ? process_one_work+0x1600/0x1600 [ 75.733919][ T25] kthread+0x3b1/0x4a0 [ 75.738152][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 75.751228][ T25] ret_from_fork+0x1f/0x30 [ 75.759125][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 75.765719][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 75.773843][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.784146][ T25] Workqueue: netns cleanup_net [ 75.788938][ T25] Call Trace: [ 75.792226][ T25] dump_stack+0x141/0x1d7 [ 75.796578][ T25] panic+0x306/0x73d [ 75.800487][ T25] ? __warn_printk+0xf3/0xf3 [ 75.805113][ T25] ? __warn.cold+0x1a/0x44 [ 75.809675][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.815410][ T25] __warn.cold+0x35/0x44 [ 75.819672][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.825445][ T25] report_bug+0x1bd/0x210 [ 75.829815][ T25] handle_bug+0x3c/0x60 [ 75.833990][ T25] exc_invalid_op+0x14/0x40 [ 75.838515][ T25] asm_exc_invalid_op+0x12/0x20 [ 75.843383][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.849732][ T25] 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 80 5a 8a 01 <0f> 0b e9 e5 00 00 00 e8 99 46 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.869470][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 75.875652][ T25] RAX: 0000000000000000 RBX: ffff888147416400 RCX: 0000000000000000 [ 75.883726][ T25] RDX: ffff888011fab880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 75.891710][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.900018][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88802de30f20 [ 75.908035][ T25] R13: 0000000000000000 R14: ffff888012132000 R15: 0000000000000001 [ 75.916147][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 75.921376][ T25] ? vprintk+0x95/0x260 [ 75.925658][ T25] nf_unregister_net_hooks+0x117/0x160 [ 75.931139][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.937205][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 75.942788][ T25] cleanup_net+0x451/0xb10 [ 75.947245][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.952646][ T25] process_one_work+0x98d/0x1600 [ 75.957615][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.963098][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 75.968270][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 75.973324][ T25] worker_thread+0x64c/0x1120 [ 75.978124][ T25] ? process_one_work+0x1600/0x1600 [ 75.983383][ T25] kthread+0x3b1/0x4a0 [ 75.987466][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 75.992604][ T25] ret_from_fork+0x1f/0x30 [ 75.997331][ T25] Kernel Offset: disabled [ 76.002046][ T25] Rebooting in 86400 seconds..