[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.1' (ECDSA) to the list of known hosts. 2021/05/07 09:00:02 fuzzer started 2021/05/07 09:00:02 connecting to host at 10.128.0.169:44937 2021/05/07 09:00:02 checking machine... 2021/05/07 09:00:02 checking revisions... 2021/05/07 09:00:02 testing simple program... syzkaller login: [ 75.941195][ T8444] chnl_net:caif_netlink_parms(): no params data found [ 75.998635][ T8444] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.007288][ T8444] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.015965][ T8444] device bridge_slave_0 entered promiscuous mode [ 76.025577][ T8444] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.033044][ T8444] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.041377][ T8444] device bridge_slave_1 entered promiscuous mode [ 76.061049][ T8444] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.072233][ T8444] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.097347][ T8444] team0: Port device team_slave_0 added [ 76.105243][ T8444] team0: Port device team_slave_1 added [ 76.124459][ T8444] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.131661][ T8444] 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. [ 76.159820][ T8444] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.173483][ T8444] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.180943][ T8444] 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. [ 76.208156][ T8444] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.235090][ T8444] device hsr_slave_0 entered promiscuous mode [ 76.242365][ T8444] device hsr_slave_1 entered promiscuous mode [ 76.348796][ T8444] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.362301][ T8444] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.372742][ T8444] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.385476][ T8444] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.416131][ T8444] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.423832][ T8444] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.432673][ T8444] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.440587][ T8444] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.485792][ T8444] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.503842][ T4854] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.516716][ T4854] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.529510][ T4854] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.539836][ T4854] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.553437][ T8444] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.570631][ T4854] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.579588][ T4854] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.587164][ T4854] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.601434][ T8148] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.610482][ T8148] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.617875][ T8148] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.640186][ T4854] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.649672][ T4854] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.663250][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.678500][ T4854] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.691372][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.703905][ T8444] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.724436][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.732564][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.746683][ T8444] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.766019][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.789215][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.799134][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.807330][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.822786][ T8444] device veth0_vlan entered promiscuous mode [ 76.834633][ T8444] device veth1_vlan entered promiscuous mode [ 76.860070][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 76.869791][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 76.880425][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 76.892919][ T8444] device veth0_macvtap entered promiscuous mode [ 76.904287][ T8444] device veth1_macvtap entered promiscuous mode [ 76.921983][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.933817][ T8444] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 76.942418][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.952462][ T8654] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.965386][ T8444] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 76.974103][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.983502][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.995611][ T8444] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.005420][ T8444] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.017382][ T8444] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.035575][ T8444] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.141662][ T125] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.157444][ T125] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.180336][ T8148] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.204586][ T159] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.215564][ T159] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.227427][ T4854] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/07 09:00:06 building call list... [ 77.951308][ T159] ------------[ cut here ]------------ [ 77.958249][ T159] hook not found, pf 3 num 0 [ 77.967258][ T159] WARNING: CPU: 0 PID: 159 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 77.986814][ T159] Modules linked in: [ 77.993471][ T159] CPU: 0 PID: 159 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 78.006440][ T159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.020197][ T159] Workqueue: netns cleanup_net [ 78.025206][ T159] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.033221][ T159] 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 99 6e 8a e8 18 43 8a 01 <0f> 0b e9 e5 00 00 00 e8 f9 c5 2a fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.057480][ T159] RSP: 0018:ffffc90000e7fbc0 EFLAGS: 00010286 [ 78.064952][ T159] RAX: 0000000000000000 RBX: ffff88802823e800 RCX: 0000000000000000 [ 78.080347][ T159] RDX: ffff888013fa0000 RSI: ffffffff815cc9a5 RDI: fffff520001cff6a [ 78.089689][ T159] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.100710][ T159] R10: ffffffff815c680e R11: 0000000000000000 R12: ffff88801d298f20 [ 78.110318][ T159] R13: 0000000000000000 R14: ffff888023eae780 R15: 0000000000000001 [ 78.120824][ T159] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 78.130918][ T159] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.139816][ T159] CR2: 00007f3ebddcb000 CR3: 000000002831b000 CR4: 00000000001506f0 [ 78.149934][ T159] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.160504][ T159] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.170623][ T159] Call Trace: [ 78.174029][ T159] nf_unregister_net_hooks+0x117/0x160 [ 78.183472][ T159] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.190405][ T159] ? arptable_filter_net_exit+0x20/0x20 [ 78.196073][ T159] cleanup_net+0x451/0xb10 [ 78.203321][ T159] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.209902][ T159] process_one_work+0x98d/0x1600 [ 78.214968][ T159] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.223398][ T159] ? rwlock_bug.part.0+0x90/0x90 [ 78.232533][ T159] ? _raw_spin_lock_irq+0x41/0x50 [ 78.240339][ T159] worker_thread+0x64c/0x1120 [ 78.245394][ T159] ? process_one_work+0x1600/0x1600 [ 78.252289][ T159] kthread+0x3b1/0x4a0 [ 78.256501][ T159] ? __kthread_bind_mask+0xc0/0xc0 [ 78.265250][ T159] ret_from_fork+0x1f/0x30 [ 78.270845][ T159] Kernel panic - not syncing: panic_on_warn set ... [ 78.277454][ T159] CPU: 0 PID: 159 Comm: kworker/u4:3 Not tainted 5.12.0-syzkaller #0 [ 78.285539][ T159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.296572][ T159] Workqueue: netns cleanup_net [ 78.301374][ T159] Call Trace: [ 78.304670][ T159] dump_stack+0x141/0x1d7 [ 78.309047][ T159] panic+0x306/0x73d [ 78.312972][ T159] ? __warn_printk+0xf3/0xf3 [ 78.317676][ T159] ? __warn.cold+0x1a/0x44 [ 78.322360][ T159] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.328483][ T159] __warn.cold+0x35/0x44 [ 78.333029][ T159] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.338866][ T159] report_bug+0x1bd/0x210 [ 78.343404][ T159] handle_bug+0x3c/0x60 [ 78.348016][ T159] exc_invalid_op+0x14/0x40 [ 78.352537][ T159] asm_exc_invalid_op+0x12/0x20 [ 78.357401][ T159] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.364191][ T159] 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 99 6e 8a e8 18 43 8a 01 <0f> 0b e9 e5 00 00 00 e8 f9 c5 2a fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.383859][ T159] RSP: 0018:ffffc90000e7fbc0 EFLAGS: 00010286 [ 78.390076][ T159] RAX: 0000000000000000 RBX: ffff88802823e800 RCX: 0000000000000000 [ 78.398165][ T159] RDX: ffff888013fa0000 RSI: ffffffff815cc9a5 RDI: fffff520001cff6a [ 78.406588][ T159] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.414665][ T159] R10: ffffffff815c680e R11: 0000000000000000 R12: ffff88801d298f20 [ 78.422745][ T159] R13: 0000000000000000 R14: ffff888023eae780 R15: 0000000000000001 [ 78.430776][ T159] ? wake_up_klogd.part.0+0x8e/0xd0 [ 78.436024][ T159] ? vprintk+0x95/0x260 [ 78.440219][ T159] nf_unregister_net_hooks+0x117/0x160 [ 78.446167][ T159] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.452414][ T159] ? arptable_filter_net_exit+0x20/0x20 [ 78.457988][ T159] cleanup_net+0x451/0xb10 [ 78.462508][ T159] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.468023][ T159] process_one_work+0x98d/0x1600 [ 78.473009][ T159] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.478510][ T159] ? rwlock_bug.part.0+0x90/0x90 [ 78.483745][ T159] ? _raw_spin_lock_irq+0x41/0x50 [ 78.489303][ T159] worker_thread+0x64c/0x1120 [ 78.494460][ T159] ? process_one_work+0x1600/0x1600 [ 78.499794][ T159] kthread+0x3b1/0x4a0 [ 78.503975][ T159] ? __kthread_bind_mask+0xc0/0xc0 [ 78.509130][ T159] ret_from_fork+0x1f/0x30 [ 78.515062][ T159] Kernel Offset: disabled [ 78.519503][ T159] Rebooting in 86400 seconds..