[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.106' (ECDSA) to the list of known hosts. 2021/05/03 16:31:00 fuzzer started 2021/05/03 16:31:00 connecting to host at 10.128.0.169:40977 2021/05/03 16:31:00 checking machine... 2021/05/03 16:31:00 checking revisions... 2021/05/03 16:31:00 testing simple program... syzkaller login: [ 81.290439][ T8417] chnl_net:caif_netlink_parms(): no params data found [ 81.346494][ T8417] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.356893][ T8417] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.366811][ T8417] device bridge_slave_0 entered promiscuous mode [ 81.377116][ T8417] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.384642][ T8417] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.393258][ T8417] device bridge_slave_1 entered promiscuous mode [ 81.414690][ T8417] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 81.428812][ T8417] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 81.451995][ T8417] team0: Port device team_slave_0 added [ 81.460577][ T8417] team0: Port device team_slave_1 added [ 81.478675][ T8417] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 81.486591][ T8417] 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. [ 81.514835][ T8417] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 81.529420][ T8417] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 81.537434][ T8417] 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. [ 81.564736][ T8417] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 81.592544][ T8417] device hsr_slave_0 entered promiscuous mode [ 81.600172][ T8417] device hsr_slave_1 entered promiscuous mode [ 81.722526][ T8417] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 81.734425][ T8417] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 81.744849][ T8417] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 81.754640][ T8417] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 81.784949][ T8417] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.792878][ T8417] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.801143][ T8417] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.808859][ T8417] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.855172][ T8417] 8021q: adding VLAN 0 to HW filter on device bond0 [ 81.873065][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 81.885517][ T20] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.895553][ T20] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.904722][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 81.919570][ T8417] 8021q: adding VLAN 0 to HW filter on device team0 [ 81.937210][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 81.946455][ T20] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.953968][ T20] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.962063][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 81.971487][ T20] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.983390][ T20] bridge0: port 2(bridge_slave_1) entered forwarding state [ 82.007677][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 82.017604][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 82.032997][ T8417] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 82.047610][ T8417] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 82.063159][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 82.073694][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 82.083960][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 82.094223][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 82.116363][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 82.124249][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 82.138853][ T8417] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 82.159548][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 82.181632][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.191424][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.201119][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.212918][ T8417] device veth0_vlan entered promiscuous mode [ 82.227167][ T8417] device veth1_vlan entered promiscuous mode [ 82.252443][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 82.261969][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 82.271812][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.284475][ T8417] device veth0_macvtap entered promiscuous mode [ 82.295612][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 82.307800][ T8417] device veth1_macvtap entered promiscuous mode [ 82.329275][ T8417] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 82.340605][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 82.352328][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 82.368170][ T8417] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 82.377980][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 82.388479][ T2938] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 82.403745][ T8417] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.415373][ T8417] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.425095][ T8417] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.435539][ T8417] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.544886][ T25] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.558078][ T25] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 82.589740][ T185] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.596531][ T4822] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 82.607756][ T185] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.621601][ T3502] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/03 16:31:03 building call list... [ 83.343728][ T185] ------------[ cut here ]------------ [ 83.353906][ T185] hook not found, pf 3 num 0 [ 83.354689][ T185] WARNING: CPU: 0 PID: 185 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 83.378123][ T185] Modules linked in: [ 83.387164][ T185] CPU: 0 PID: 185 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 83.399514][ T185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.412245][ T185] Workqueue: netns cleanup_net [ 83.420422][ T185] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 83.428946][ T185] 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 60 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 83.455293][ T185] RSP: 0018:ffffc90000e9fbc0 EFLAGS: 00010286 [ 83.464218][ T185] RAX: 0000000000000000 RBX: ffff888147611000 RCX: 0000000000000000 [ 83.475133][ T185] RDX: ffff8880124db880 RSI: ffffffff815c8ba5 RDI: fffff520001d3f6a [ 83.487393][ T185] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 83.496574][ T185] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888035e90f20 [ 83.504882][ T185] R13: 0000000000000000 R14: ffff8880121fb780 R15: 0000000000000001 [ 83.518680][ T185] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 83.528883][ T185] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.537908][ T185] CR2: 00007ff664b50000 CR3: 00000000131f0000 CR4: 00000000001506f0 [ 83.547680][ T185] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.558992][ T185] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.569293][ T185] Call Trace: [ 83.572736][ T185] nf_unregister_net_hooks+0x117/0x160 [ 83.582037][ T185] arpt_unregister_table_pre_exit+0x67/0x80 [ 83.589490][ T185] ? arptable_filter_net_exit+0x20/0x20 [ 83.595351][ T185] cleanup_net+0x451/0xb10 [ 83.606397][ T185] ? ops_free_list.part.0+0x3d0/0x3d0 [ 83.612057][ T185] process_one_work+0x98d/0x1600 [ 83.620440][ T185] ? pwq_dec_nr_in_flight+0x320/0x320 [ 83.627422][ T185] ? rwlock_bug.part.0+0x90/0x90 [ 83.632664][ T185] ? _raw_spin_lock_irq+0x41/0x50 [ 83.641078][ T185] worker_thread+0x64c/0x1120 [ 83.647050][ T185] ? __kthread_parkme+0x13f/0x1e0 [ 83.652305][ T185] ? process_one_work+0x1600/0x1600 [ 83.660562][ T185] kthread+0x3b1/0x4a0 [ 83.665319][ T185] ? __kthread_bind_mask+0xc0/0xc0 [ 83.672810][ T185] ret_from_fork+0x1f/0x30 [ 83.681855][ T185] Kernel panic - not syncing: panic_on_warn set ... [ 83.688659][ T185] CPU: 0 PID: 185 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 83.696951][ T185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.707541][ T185] Workqueue: netns cleanup_net [ 83.712336][ T185] Call Trace: [ 83.715626][ T185] dump_stack+0x141/0x1d7 [ 83.719984][ T185] panic+0x306/0x73d [ 83.724167][ T185] ? __warn_printk+0xf3/0xf3 [ 83.728962][ T185] ? __warn.cold+0x1a/0x44 [ 83.733404][ T185] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.739349][ T185] __warn.cold+0x35/0x44 [ 83.743614][ T185] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.749633][ T185] report_bug+0x1bd/0x210 [ 83.753989][ T185] handle_bug+0x3c/0x60 [ 83.758168][ T185] exc_invalid_op+0x14/0x40 [ 83.763758][ T185] asm_exc_invalid_op+0x12/0x20 [ 83.769097][ T185] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 83.775642][ T185] 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 60 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 79 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 83.797270][ T185] RSP: 0018:ffffc90000e9fbc0 EFLAGS: 00010286 [ 83.803894][ T185] RAX: 0000000000000000 RBX: ffff888147611000 RCX: 0000000000000000 [ 83.813056][ T185] RDX: ffff8880124db880 RSI: ffffffff815c8ba5 RDI: fffff520001d3f6a [ 83.822383][ T185] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 83.832904][ T185] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888035e90f20 [ 83.842182][ T185] R13: 0000000000000000 R14: ffff8880121fb780 R15: 0000000000000001 [ 83.851122][ T185] ? wake_up_klogd.part.0+0x8e/0xd0 [ 83.857166][ T185] ? vprintk+0x95/0x260 [ 83.862788][ T185] nf_unregister_net_hooks+0x117/0x160 [ 83.870042][ T185] arpt_unregister_table_pre_exit+0x67/0x80 [ 83.876546][ T185] ? arptable_filter_net_exit+0x20/0x20 [ 83.882884][ T185] cleanup_net+0x451/0xb10 [ 83.887789][ T185] ? ops_free_list.part.0+0x3d0/0x3d0 [ 83.893860][ T185] process_one_work+0x98d/0x1600 [ 83.900523][ T185] ? pwq_dec_nr_in_flight+0x320/0x320 [ 83.907263][ T185] ? rwlock_bug.part.0+0x90/0x90 [ 83.912403][ T185] ? _raw_spin_lock_irq+0x41/0x50 [ 83.918256][ T185] worker_thread+0x64c/0x1120 [ 83.923539][ T185] ? __kthread_parkme+0x13f/0x1e0 [ 83.929227][ T185] ? process_one_work+0x1600/0x1600 [ 83.934642][ T185] kthread+0x3b1/0x4a0 [ 83.939269][ T185] ? __kthread_bind_mask+0xc0/0xc0 [ 83.944665][ T185] ret_from_fork+0x1f/0x30 [ 83.950957][ T185] Kernel Offset: disabled [ 83.955774][ T185] Rebooting in 86400 seconds..