[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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 '10.128.0.205' (ECDSA) to the list of known hosts. 2021/04/30 18:12:16 fuzzer started 2021/04/30 18:12:16 connecting to host at 10.128.0.169:46143 2021/04/30 18:12:16 checking machine... 2021/04/30 18:12:16 checking revisions... 2021/04/30 18:12:16 testing simple program... syzkaller login: [ 81.230322][ T8448] chnl_net:caif_netlink_parms(): no params data found [ 81.296664][ T8448] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.306507][ T8448] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.316947][ T8448] device bridge_slave_0 entered promiscuous mode [ 81.329172][ T8448] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.339943][ T8448] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.349805][ T8448] device bridge_slave_1 entered promiscuous mode [ 81.375837][ T8448] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 81.391562][ T8448] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 81.418926][ T8448] team0: Port device team_slave_0 added [ 81.427942][ T8448] team0: Port device team_slave_1 added [ 81.448816][ T8448] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 81.457725][ T8448] 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. [ 81.486119][ T8448] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 81.503782][ T8448] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 81.512734][ T8448] 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. [ 81.540755][ T8448] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 81.564889][ T8448] device hsr_slave_0 entered promiscuous mode [ 81.573349][ T8448] device hsr_slave_1 entered promiscuous mode [ 81.693257][ T8448] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 81.705788][ T8448] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 81.717064][ T8448] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 81.728975][ T8448] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 81.758641][ T8448] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.766478][ T8448] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.775301][ T8448] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.782862][ T8448] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.836450][ T8448] 8021q: adding VLAN 0 to HW filter on device bond0 [ 81.852867][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 81.866544][ T4841] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.876527][ T4841] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.886266][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 81.902144][ T8448] 8021q: adding VLAN 0 to HW filter on device team0 [ 81.917130][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 81.926659][ T20] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.934437][ T20] bridge0: port 1(bridge_slave_0) entered forwarding state [ 81.952709][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 81.962268][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.969963][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.990472][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 82.010224][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 82.020776][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 82.030802][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 82.045399][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 82.060340][ T8448] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 82.084902][ T8671] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 82.093632][ T8671] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 82.112676][ T8448] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 82.138759][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 82.166467][ T8671] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.177952][ T8671] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.187167][ T8671] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.201496][ T8448] device veth0_vlan entered promiscuous mode [ 82.220061][ T8448] device veth1_vlan entered promiscuous mode [ 82.252502][ T8671] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 82.263036][ T8671] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.277456][ T8448] device veth0_macvtap entered promiscuous mode [ 82.293791][ T8448] device veth1_macvtap entered promiscuous mode [ 82.326442][ T8448] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 82.334840][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 82.344288][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 82.353683][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 82.364208][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 82.380124][ T8448] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 82.389847][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 82.399821][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 82.415668][ T8448] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 82.428654][ T8448] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.439496][ T8448] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.449980][ T8448] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.576147][ T8483] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.585519][ T8483] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.599246][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 82.641666][ T8483] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.652935][ T8483] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.665749][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/30 18:12:19 building call list... [ 83.392182][ T9] ------------[ cut here ]------------ [ 83.398062][ T9] hook not found, pf 3 num 0 [ 83.398747][ T9] WARNING: CPU: 1 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 83.418681][ T9] Modules linked in: [ 83.424484][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 83.437004][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.448410][ T9] Workqueue: netns cleanup_net [ 83.456185][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 83.464328][ 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 [ 83.488674][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 83.496482][ T9] RAX: 0000000000000000 RBX: ffff888021905600 RCX: 0000000000000000 [ 83.507703][ T9] RDX: ffff888011d50000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 83.517163][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 83.528928][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880289d8f20 [ 83.538558][ T9] R13: 0000000000000000 R14: ffff8880218ba300 R15: 0000000000000001 [ 83.549822][ T9] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 83.558996][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.567467][ T9] CR2: 00007f88884cf000 CR3: 0000000020ee8000 CR4: 00000000001506e0 [ 83.578381][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.593140][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.602967][ T9] Call Trace: [ 83.606548][ T9] nf_unregister_net_hooks+0x117/0x160 [ 83.616356][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 83.625428][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 83.634103][ T9] cleanup_net+0x451/0xb10 [ 83.638770][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 83.646241][ T9] process_one_work+0x98d/0x1600 [ 83.653896][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 83.663340][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 83.669152][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 83.677716][ T9] worker_thread+0x64c/0x1120 [ 83.683855][ T9] ? process_one_work+0x1600/0x1600 [ 83.689212][ T9] kthread+0x3b1/0x4a0 [ 83.696816][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 83.703905][ T9] ret_from_fork+0x1f/0x30 [ 83.712409][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 83.719220][ T9] CPU: 1 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 83.727419][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.737984][ T9] Workqueue: netns cleanup_net [ 83.743201][ T9] Call Trace: [ 83.746766][ T9] dump_stack+0x141/0x1d7 [ 83.751459][ T9] panic+0x306/0x73d [ 83.755359][ T9] ? __warn_printk+0xf3/0xf3 [ 83.760883][ T9] ? __warn.cold+0x1a/0x44 [ 83.765304][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.771574][ T9] __warn.cold+0x35/0x44 [ 83.775938][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.781768][ T9] report_bug+0x1bd/0x210 [ 83.786206][ T9] handle_bug+0x3c/0x60 [ 83.790393][ T9] exc_invalid_op+0x14/0x40 [ 83.795186][ T9] asm_exc_invalid_op+0x12/0x20 [ 83.800675][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 83.807286][ 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 [ 83.827468][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 83.834345][ T9] RAX: 0000000000000000 RBX: ffff888021905600 RCX: 0000000000000000 [ 83.843059][ T9] RDX: ffff888011d50000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 83.851434][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 83.859856][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880289d8f20 [ 83.867999][ T9] R13: 0000000000000000 R14: ffff8880218ba300 R15: 0000000000000001 [ 83.876065][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 83.881294][ T9] ? vprintk+0x95/0x260 [ 83.885610][ T9] nf_unregister_net_hooks+0x117/0x160 [ 83.891251][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 83.897608][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 83.903595][ T9] cleanup_net+0x451/0xb10 [ 83.908472][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 83.914408][ T9] process_one_work+0x98d/0x1600 [ 83.919786][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 83.925795][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 83.931525][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 83.936864][ T9] worker_thread+0x64c/0x1120 [ 83.941743][ T9] ? process_one_work+0x1600/0x1600 [ 83.946946][ T9] kthread+0x3b1/0x4a0 [ 83.951272][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 83.956571][ T9] ret_from_fork+0x1f/0x30 [ 83.962377][ T9] Kernel Offset: disabled [ 83.967086][ T9] Rebooting in 86400 seconds..