[ 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 ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 '10.128.0.244' (ECDSA) to the list of known hosts. 2021/04/30 18:12:08 fuzzer started 2021/04/30 18:12:09 connecting to host at 10.128.0.169:42899 2021/04/30 18:12:09 checking machine... 2021/04/30 18:12:09 checking revisions... 2021/04/30 18:12:09 testing simple program... syzkaller login: [ 74.520314][ T8415] chnl_net:caif_netlink_parms(): no params data found [ 74.575588][ T8415] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.586246][ T8415] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.596229][ T8415] device bridge_slave_0 entered promiscuous mode [ 74.606713][ T8415] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.614597][ T8415] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.622773][ T8415] device bridge_slave_1 entered promiscuous mode [ 74.645940][ T8415] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.658623][ T8415] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.684825][ T8415] team0: Port device team_slave_0 added [ 74.693888][ T8415] team0: Port device team_slave_1 added [ 74.711988][ T8415] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.719511][ T8415] 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. [ 74.748414][ T8415] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.761980][ T8415] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.769674][ T8415] 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. [ 74.797575][ T8415] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.825887][ T8415] device hsr_slave_0 entered promiscuous mode [ 74.834621][ T8415] device hsr_slave_1 entered promiscuous mode [ 74.946890][ T8415] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.958377][ T8415] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.975741][ T8415] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.990417][ T8415] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.025262][ T8415] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.033687][ T8415] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.042238][ T8415] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.049674][ T8415] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.115712][ T8415] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.135247][ T3168] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.149287][ T3168] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.161104][ T3168] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.176902][ T3168] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.195784][ T8415] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.210940][ T3168] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.220443][ T3168] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.227719][ T3168] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.239969][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.249860][ T36] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.257535][ T36] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.279536][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.289750][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.302691][ T3146] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.320763][ T8415] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 75.333428][ T8415] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 75.348399][ T3168] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.358306][ T3168] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.368730][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.388068][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.395831][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 75.410600][ T8415] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.433423][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.451696][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.461533][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.470956][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.481752][ T8415] device veth0_vlan entered promiscuous mode [ 75.506412][ T8415] device veth1_vlan entered promiscuous mode [ 75.537167][ T3146] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 75.546822][ T3146] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.557965][ T8415] device veth0_macvtap entered promiscuous mode [ 75.570638][ T8415] device veth1_macvtap entered promiscuous mode [ 75.589092][ T8415] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.599558][ T3146] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.608912][ T3146] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 75.617780][ T3146] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.627425][ T3146] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.639908][ T8415] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.649594][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.659131][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.671700][ T8415] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.682503][ T8415] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.692460][ T8415] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.704382][ T8415] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 75.810674][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.824900][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.838748][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.862450][ T25] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.871596][ T25] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.885582][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/30 18:12:12 building call list... [ 76.541372][ T9] ------------[ cut here ]------------ [ 76.549522][ T9] hook not found, pf 3 num 0 [ 76.550313][ T9] WARNING: CPU: 0 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 76.569709][ T9] Modules linked in: [ 76.578233][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 76.587490][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.598488][ T9] Workqueue: netns cleanup_net [ 76.603740][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.610301][ 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 78 6d 8a e8 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.633667][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 76.640412][ T9] RAX: 0000000000000000 RBX: ffff888146cde300 RCX: 0000000000000000 [ 76.651297][ T9] RDX: ffff888011d78000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 76.665171][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.675646][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888036670f20 [ 76.684739][ T9] R13: 0000000000000000 R14: ffff888015fc3980 R15: 0000000000000001 [ 76.693806][ T9] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 76.704538][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.711458][ T9] CR2: 000055ee6291a160 CR3: 000000001d4b3000 CR4: 00000000001506f0 [ 76.720911][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.729688][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.742259][ T9] Call Trace: [ 76.746476][ T9] nf_unregister_net_hooks+0x117/0x160 [ 76.752255][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.759387][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 76.766558][ T9] cleanup_net+0x451/0xb10 [ 76.771314][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.778857][ T9] process_one_work+0x98d/0x1600 [ 76.787025][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.792718][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 76.798493][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 76.805707][ T9] worker_thread+0x64c/0x1120 [ 76.810880][ T9] ? process_one_work+0x1600/0x1600 [ 76.822434][ T9] kthread+0x3b1/0x4a0 [ 76.828463][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 76.834465][ T9] ret_from_fork+0x1f/0x30 [ 76.839039][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 76.845811][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 76.854502][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.865280][ T9] Workqueue: netns cleanup_net [ 76.870434][ T9] Call Trace: [ 76.873995][ T9] dump_stack+0x141/0x1d7 [ 76.878764][ T9] panic+0x306/0x73d [ 76.882796][ T9] ? __warn_printk+0xf3/0xf3 [ 76.887529][ T9] ? __warn.cold+0x1a/0x44 [ 76.892098][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.897846][ T9] __warn.cold+0x35/0x44 [ 76.902323][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.908180][ T9] report_bug+0x1bd/0x210 [ 76.912910][ T9] handle_bug+0x3c/0x60 [ 76.917563][ T9] exc_invalid_op+0x14/0x40 [ 76.922353][ T9] asm_exc_invalid_op+0x12/0x20 [ 76.927762][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.934117][ 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 78 6d 8a e8 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.954529][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 76.960799][ T9] RAX: 0000000000000000 RBX: ffff888146cde300 RCX: 0000000000000000 [ 76.969150][ T9] RDX: ffff888011d78000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 76.977681][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.985941][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888036670f20 [ 76.994021][ T9] R13: 0000000000000000 R14: ffff888015fc3980 R15: 0000000000000001 [ 77.002475][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 77.008351][ T9] ? vprintk+0x95/0x260 [ 77.013070][ T9] nf_unregister_net_hooks+0x117/0x160 [ 77.019230][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.025238][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 77.030901][ T9] cleanup_net+0x451/0xb10 [ 77.035381][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.040873][ T9] process_one_work+0x98d/0x1600 [ 77.046033][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.051531][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 77.056600][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 77.061711][ T9] worker_thread+0x64c/0x1120 [ 77.066509][ T9] ? process_one_work+0x1600/0x1600 [ 77.072021][ T9] kthread+0x3b1/0x4a0 [ 77.076192][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 77.081335][ T9] ret_from_fork+0x1f/0x30 [ 77.087549][ T9] Kernel Offset: disabled [ 77.092941][ T9] Rebooting in 86400 seconds..