[ 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 '10.128.1.104' (ECDSA) to the list of known hosts. 2021/05/05 18:44:49 fuzzer started 2021/05/05 18:44:50 connecting to host at 10.128.0.169:34299 2021/05/05 18:44:50 checking machine... 2021/05/05 18:44:50 checking revisions... 2021/05/05 18:44:50 testing simple program... syzkaller login: [ 75.450112][ T8434] chnl_net:caif_netlink_parms(): no params data found [ 75.511802][ T8434] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.522277][ T8434] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.532250][ T8434] device bridge_slave_0 entered promiscuous mode [ 75.542667][ T8434] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.551231][ T8434] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.560852][ T8434] device bridge_slave_1 entered promiscuous mode [ 75.583136][ T8434] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.596753][ T8434] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 75.621776][ T8434] team0: Port device team_slave_0 added [ 75.631293][ T8434] team0: Port device team_slave_1 added [ 75.654095][ T8434] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 75.661513][ T8434] 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. [ 75.692295][ T8434] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 75.706671][ T8434] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 75.714035][ T8434] 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. [ 75.740799][ T8434] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 75.770462][ T8434] device hsr_slave_0 entered promiscuous mode [ 75.778380][ T8434] device hsr_slave_1 entered promiscuous mode [ 75.886507][ T8434] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 75.900467][ T8434] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.913895][ T8434] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.932290][ T8434] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.962075][ T8434] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.969603][ T8434] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.978481][ T8434] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.986145][ T8434] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.037659][ T8434] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.055418][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.071527][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.082007][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.093401][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.113553][ T8434] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.128870][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.139169][ T4832] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.151464][ T4832] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.176640][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.189547][ T4832] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.199074][ T4832] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.214611][ T8656] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.229811][ T8656] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.247748][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.262026][ T8656] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.278436][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.292995][ T8434] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.320395][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.329691][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.342632][ T8434] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.364858][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.387856][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.397521][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.407713][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.423315][ T8434] device veth0_vlan entered promiscuous mode [ 76.439013][ T8434] device veth1_vlan entered promiscuous mode [ 76.466762][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 76.479821][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 76.494919][ T8434] device veth0_macvtap entered promiscuous mode [ 76.510187][ T8434] device veth1_macvtap entered promiscuous mode [ 76.528786][ T8434] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 76.540929][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.553150][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 76.563321][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.576501][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.590915][ T8434] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 76.599987][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.610126][ T8658] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.624452][ T8434] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.636384][ T8434] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.648059][ T8434] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.658203][ T8434] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 76.759052][ T25] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.775254][ T25] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.801033][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 76.817108][ T25] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.825280][ T25] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.838292][ T4832] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/05 18:44:53 building call list... [ 77.464041][ T153] ------------[ cut here ]------------ [ 77.472171][ T153] hook not found, pf 3 num 0 [ 77.472826][ T153] WARNING: CPU: 0 PID: 153 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 77.488716][ T153] Modules linked in: [ 77.492652][ T153] CPU: 0 PID: 153 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 77.503782][ T153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.514480][ T153] Workqueue: netns cleanup_net [ 77.520158][ T153] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 77.527394][ T153] 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 d8 6d 8a e8 70 4b 8a 01 <0f> 0b e9 e5 00 00 00 e8 89 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 77.547677][ T153] RSP: 0018:ffffc900014ffbc0 EFLAGS: 00010286 [ 77.554159][ T153] RAX: 0000000000000000 RBX: ffff8880245f6300 RCX: 0000000000000000 [ 77.565633][ T153] RDX: ffff888013379c40 RSI: ffffffff815c8ba5 RDI: fffff5200029ff6a [ 77.573836][ T153] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 77.590786][ T153] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801bc50f20 [ 77.603224][ T153] R13: 0000000000000000 R14: ffff888017352380 R15: 0000000000000001 [ 77.614612][ T153] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 77.624988][ T153] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.634318][ T153] CR2: 00007f8d14bd0000 CR3: 000000002bbe7000 CR4: 00000000001506f0 [ 77.644122][ T153] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.655232][ T153] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.668040][ T153] Call Trace: [ 77.671599][ T153] nf_unregister_net_hooks+0x117/0x160 [ 77.678706][ T153] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.684669][ T153] ? arptable_filter_net_exit+0x20/0x20 [ 77.693570][ T153] cleanup_net+0x451/0xb10 [ 77.700403][ T153] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.708818][ T153] process_one_work+0x98d/0x1600 [ 77.713998][ T153] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.720929][ T153] ? rwlock_bug.part.0+0x90/0x90 [ 77.728418][ T153] ? _raw_spin_lock_irq+0x41/0x50 [ 77.733523][ T153] worker_thread+0x64c/0x1120 [ 77.742976][ T153] ? process_one_work+0x1600/0x1600 [ 77.751189][ T153] kthread+0x3b1/0x4a0 [ 77.755326][ T153] ? __kthread_bind_mask+0xc0/0xc0 [ 77.761990][ T153] ret_from_fork+0x1f/0x30 [ 77.768977][ T153] Kernel panic - not syncing: panic_on_warn set ... [ 77.775583][ T153] CPU: 0 PID: 153 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 77.783942][ T153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.794009][ T153] Workqueue: netns cleanup_net [ 77.798813][ T153] Call Trace: [ 77.802373][ T153] dump_stack+0x141/0x1d7 [ 77.806898][ T153] panic+0x306/0x73d [ 77.810904][ T153] ? __warn_printk+0xf3/0xf3 [ 77.815629][ T153] ? __warn.cold+0x1a/0x44 [ 77.820502][ T153] ? __nf_unregister_net_hook+0x1eb/0x610 [ 77.826367][ T153] __warn.cold+0x35/0x44 [ 77.830719][ T153] ? __nf_unregister_net_hook+0x1eb/0x610 [ 77.836936][ T153] report_bug+0x1bd/0x210 [ 77.841381][ T153] handle_bug+0x3c/0x60 [ 77.845552][ T153] exc_invalid_op+0x14/0x40 [ 77.850102][ T153] asm_exc_invalid_op+0x12/0x20 [ 77.854971][ T153] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 77.861692][ T153] 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 d8 6d 8a e8 70 4b 8a 01 <0f> 0b e9 e5 00 00 00 e8 89 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 77.881431][ T153] RSP: 0018:ffffc900014ffbc0 EFLAGS: 00010286 [ 77.887518][ T153] RAX: 0000000000000000 RBX: ffff8880245f6300 RCX: 0000000000000000 [ 77.895519][ T153] RDX: ffff888013379c40 RSI: ffffffff815c8ba5 RDI: fffff5200029ff6a [ 77.903507][ T153] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 77.911697][ T153] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801bc50f20 [ 77.919978][ T153] R13: 0000000000000000 R14: ffff888017352380 R15: 0000000000000001 [ 77.927981][ T153] ? wake_up_klogd.part.0+0x8e/0xd0 [ 77.933295][ T153] ? vprintk+0x95/0x260 [ 77.937508][ T153] nf_unregister_net_hooks+0x117/0x160 [ 77.943093][ T153] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.949006][ T153] ? arptable_filter_net_exit+0x20/0x20 [ 77.954672][ T153] cleanup_net+0x451/0xb10 [ 77.959116][ T153] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.964543][ T153] process_one_work+0x98d/0x1600 [ 77.969517][ T153] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.974915][ T153] ? rwlock_bug.part.0+0x90/0x90 [ 77.980051][ T153] ? _raw_spin_lock_irq+0x41/0x50 [ 77.985148][ T153] worker_thread+0x64c/0x1120 [ 77.989891][ T153] ? process_one_work+0x1600/0x1600 [ 77.995118][ T153] kthread+0x3b1/0x4a0 [ 77.999210][ T153] ? __kthread_bind_mask+0xc0/0xc0 [ 78.004349][ T153] ret_from_fork+0x1f/0x30 [ 78.010105][ T153] Kernel Offset: disabled [ 78.015555][ T153] Rebooting in 86400 seconds..