[ 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 '10.128.0.238' (ECDSA) to the list of known hosts. 2021/04/29 05:52:22 fuzzer started 2021/04/29 05:52:22 connecting to host at 10.128.0.169:41515 2021/04/29 05:52:22 checking machine... 2021/04/29 05:52:22 checking revisions... 2021/04/29 05:52:22 testing simple program... syzkaller login: [ 71.143285][ T8443] chnl_net:caif_netlink_parms(): no params data found [ 71.195518][ T8443] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.204640][ T8443] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.214847][ T8443] device bridge_slave_0 entered promiscuous mode [ 71.225164][ T8443] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.233445][ T8443] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.242939][ T8443] device bridge_slave_1 entered promiscuous mode [ 71.264579][ T8443] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 71.276326][ T8443] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 71.301270][ T8443] team0: Port device team_slave_0 added [ 71.310213][ T8443] team0: Port device team_slave_1 added [ 71.328932][ T8443] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 71.336290][ T8443] 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. [ 71.363783][ T8443] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 71.377150][ T8443] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 71.384630][ T8443] 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. [ 71.412081][ T8443] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 71.441990][ T8443] device hsr_slave_0 entered promiscuous mode [ 71.449452][ T8443] device hsr_slave_1 entered promiscuous mode [ 71.563755][ T8443] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.575620][ T8443] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.587090][ T8443] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.599956][ T8443] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 71.628613][ T8443] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.636369][ T8443] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.646212][ T8443] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.654385][ T8443] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.709117][ T8443] 8021q: adding VLAN 0 to HW filter on device bond0 [ 71.725351][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 71.739323][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.750821][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.760301][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 71.776170][ T8443] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.787697][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.798659][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.806050][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.821077][ T2958] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.830369][ T2958] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.838680][ T2958] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.860269][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.872654][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.899048][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.909488][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 71.920168][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.931598][ T8443] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.951654][ T2958] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.960132][ T2958] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.978001][ T8443] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 71.999014][ T2958] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 72.022645][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 72.032212][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 72.041329][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 72.052453][ T8443] device veth0_vlan entered promiscuous mode [ 72.067050][ T8443] device veth1_vlan entered promiscuous mode [ 72.094090][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 72.103872][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 72.113188][ T8663] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 72.125383][ T8443] device veth0_macvtap entered promiscuous mode [ 72.135666][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 72.150176][ T8443] device veth1_macvtap entered promiscuous mode [ 72.171546][ T8443] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 72.179744][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 72.190133][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 72.202789][ T8443] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 72.211694][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 72.222041][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 72.234703][ T8443] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.248241][ T8443] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.257010][ T8443] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.269609][ T8443] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.361243][ T324] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 72.395518][ T324] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 72.418785][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 72.431180][ T9] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 72.442598][ T9] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 72.456097][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/29 05:52:25 building call list... [ 73.094846][ T324] ------------[ cut here ]------------ [ 73.110361][ T324] hook not found, pf 3 num 0 [ 73.110927][ T324] WARNING: CPU: 0 PID: 324 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 73.132002][ T324] Modules linked in: [ 73.136039][ T324] CPU: 0 PID: 324 Comm: kworker/u4:6 Not tainted 5.12.0-next-20210429-syzkaller #0 [ 73.150874][ T324] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.162018][ T324] Workqueue: netns cleanup_net [ 73.166834][ T324] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 73.176722][ T324] 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 00 4e 6e 8a e8 58 5e 8a 01 <0f> 0b e9 e5 00 00 00 e8 09 e0 2c fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 73.200413][ T324] RSP: 0018:ffffc9000110fbc0 EFLAGS: 00010286 [ 73.206578][ T324] RAX: 0000000000000000 RBX: ffff888024adbe00 RCX: 0000000000000000 [ 73.216321][ T324] RDX: ffff8880133a3900 RSI: ffffffff815cc9f5 RDI: fffff52000221f6a [ 73.225619][ T324] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 73.235182][ T324] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff8880395d8f20 [ 73.244313][ T324] R13: 0000000000000000 R14: ffff888014a99900 R15: 0000000000000001 [ 73.253744][ T324] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 73.264523][ T324] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.272478][ T324] CR2: 00007f603b168000 CR3: 000000001ada5000 CR4: 00000000001506f0 [ 73.293784][ T324] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.303094][ T324] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.312416][ T324] Call Trace: [ 73.315747][ T324] nf_unregister_net_hooks+0x117/0x160 [ 73.323445][ T324] arpt_unregister_table_pre_exit+0x67/0x80 [ 73.331730][ T324] ? arptable_filter_net_exit+0x20/0x20 [ 73.337494][ T324] cleanup_net+0x451/0xb10 [ 73.343640][ T324] ? ops_free_list.part.0+0x3d0/0x3d0 [ 73.350498][ T324] process_one_work+0x98d/0x1600 [ 73.355794][ T324] ? pwq_dec_nr_in_flight+0x320/0x320 [ 73.365768][ T324] ? rwlock_bug.part.0+0x90/0x90 [ 73.372719][ T324] ? _raw_spin_lock_irq+0x41/0x50 [ 73.380173][ T324] worker_thread+0x64c/0x1120 [ 73.385100][ T324] ? __kthread_parkme+0x13f/0x1e0 [ 73.392489][ T324] ? process_one_work+0x1600/0x1600 [ 73.398863][ T324] kthread+0x3b1/0x4a0 [ 73.402983][ T324] ? __kthread_bind_mask+0xc0/0xc0 [ 73.410088][ T324] ret_from_fork+0x1f/0x30 [ 73.414674][ T324] Kernel panic - not syncing: panic_on_warn set ... [ 73.421440][ T324] CPU: 0 PID: 324 Comm: kworker/u4:6 Not tainted 5.12.0-next-20210429-syzkaller #0 [ 73.430864][ T324] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.440937][ T324] Workqueue: netns cleanup_net [ 73.445725][ T324] Call Trace: [ 73.449099][ T324] dump_stack+0x141/0x1d7 [ 73.453475][ T324] panic+0x306/0x73d [ 73.457484][ T324] ? __warn_printk+0xf3/0xf3 [ 73.462286][ T324] ? __warn.cold+0x1a/0x44 [ 73.466837][ T324] ? __nf_unregister_net_hook+0x1eb/0x610 [ 73.472756][ T324] __warn.cold+0x35/0x44 [ 73.477557][ T324] ? __nf_unregister_net_hook+0x1eb/0x610 [ 73.483293][ T324] report_bug+0x1bd/0x210 [ 73.487646][ T324] handle_bug+0x3c/0x60 [ 73.491918][ T324] exc_invalid_op+0x14/0x40 [ 73.496461][ T324] asm_exc_invalid_op+0x12/0x20 [ 73.501331][ T324] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 73.507768][ T324] 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 00 4e 6e 8a e8 58 5e 8a 01 <0f> 0b e9 e5 00 00 00 e8 09 e0 2c fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 73.527482][ T324] RSP: 0018:ffffc9000110fbc0 EFLAGS: 00010286 [ 73.533565][ T324] RAX: 0000000000000000 RBX: ffff888024adbe00 RCX: 0000000000000000 [ 73.541660][ T324] RDX: ffff8880133a3900 RSI: ffffffff815cc9f5 RDI: fffff52000221f6a [ 73.549957][ T324] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 73.557950][ T324] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff8880395d8f20 [ 73.565945][ T324] R13: 0000000000000000 R14: ffff888014a99900 R15: 0000000000000001 [ 73.573963][ T324] ? wake_up_klogd.part.0+0x8e/0xd0 [ 73.579221][ T324] ? vprintk+0x95/0x260 [ 73.583574][ T324] nf_unregister_net_hooks+0x117/0x160 [ 73.589103][ T324] arpt_unregister_table_pre_exit+0x67/0x80 [ 73.595606][ T324] ? arptable_filter_net_exit+0x20/0x20 [ 73.601623][ T324] cleanup_net+0x451/0xb10 [ 73.606182][ T324] ? ops_free_list.part.0+0x3d0/0x3d0 [ 73.612124][ T324] process_one_work+0x98d/0x1600 [ 73.617458][ T324] ? pwq_dec_nr_in_flight+0x320/0x320 [ 73.622894][ T324] ? rwlock_bug.part.0+0x90/0x90 [ 73.627853][ T324] ? _raw_spin_lock_irq+0x41/0x50 [ 73.632999][ T324] worker_thread+0x64c/0x1120 [ 73.637714][ T324] ? __kthread_parkme+0x13f/0x1e0 [ 73.642755][ T324] ? process_one_work+0x1600/0x1600 [ 73.648855][ T324] kthread+0x3b1/0x4a0 [ 73.653062][ T324] ? __kthread_bind_mask+0xc0/0xc0 [ 73.658996][ T324] ret_from_fork+0x1f/0x30 [ 73.665422][ T324] Kernel Offset: disabled [ 73.670007][ T324] Rebooting in 86400 seconds..