[ 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 '10.128.1.122' (ECDSA) to the list of known hosts. 2021/05/05 00:43:55 fuzzer started 2021/05/05 00:43:55 connecting to host at 10.128.0.169:34269 2021/05/05 00:43:55 checking machine... 2021/05/05 00:43:55 checking revisions... 2021/05/05 00:43:55 testing simple program... syzkaller login: [ 76.418643][ T8425] chnl_net:caif_netlink_parms(): no params data found [ 76.470741][ T8425] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.479340][ T8425] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.488821][ T8425] device bridge_slave_0 entered promiscuous mode [ 76.499582][ T8425] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.508207][ T8425] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.517529][ T8425] device bridge_slave_1 entered promiscuous mode [ 76.539899][ T8425] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.552834][ T8425] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.576086][ T8425] team0: Port device team_slave_0 added [ 76.584158][ T8425] team0: Port device team_slave_1 added [ 76.603384][ T8425] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.610963][ T8425] 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. [ 76.638638][ T8425] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.653353][ T8425] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.660519][ T8425] 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. [ 76.688253][ T8425] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.716096][ T8425] device hsr_slave_0 entered promiscuous mode [ 76.723045][ T8425] device hsr_slave_1 entered promiscuous mode [ 76.830673][ T8425] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.842934][ T8425] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.854306][ T8425] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.864927][ T8425] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.895989][ T8425] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.903847][ T8425] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.912489][ T8425] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.919868][ T8425] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.966985][ T8425] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.981111][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.994511][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.005325][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.014349][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 77.028701][ T8425] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.054324][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.064211][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.071661][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.080437][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.089808][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.097055][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.119560][ T8425] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 77.131182][ T8425] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 77.147039][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.157039][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.166183][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.175429][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.184537][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.192736][ T3914] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.214236][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.223781][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.237272][ T8425] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.260649][ T3339] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.284703][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.294321][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.303298][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.315001][ T8425] device veth0_vlan entered promiscuous mode [ 77.328256][ T8425] device veth1_vlan entered promiscuous mode [ 77.352803][ T3339] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.363587][ T3339] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.373776][ T3339] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.387191][ T8425] device veth0_macvtap entered promiscuous mode [ 77.398965][ T8425] device veth1_macvtap entered promiscuous mode [ 77.419105][ T8425] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.428989][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.438685][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.451783][ T8425] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.459362][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.469502][ T8646] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.484731][ T8425] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.494255][ T8425] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.504226][ T8425] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.514231][ T8425] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 77.623632][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.647855][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.665622][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.685911][ T359] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.695613][ T359] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.708149][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/05 00:43:58 building call list... [ 78.369814][ T25] ------------[ cut here ]------------ [ 78.377653][ T25] hook not found, pf 3 num 0 [ 78.378415][ T25] WARNING: CPU: 0 PID: 25 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 78.402885][ T25] Modules linked in: [ 78.407667][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 78.418095][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.428633][ T25] Workqueue: netns cleanup_net [ 78.436319][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.443838][ T25] 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 40 4d 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 19 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.467352][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 78.475223][ T25] RAX: 0000000000000000 RBX: ffff8880240bfc00 RCX: 0000000000000000 [ 78.486886][ T25] RDX: ffff888015753880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 78.495878][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.505504][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88802b538f20 [ 78.514176][ T25] R13: 0000000000000000 R14: ffff88801ad41100 R15: 0000000000000001 [ 78.524279][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 78.533786][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.540709][ T25] CR2: 0000562e6a614398 CR3: 00000000274ca000 CR4: 00000000001506f0 [ 78.557591][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.567630][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.576100][ T25] Call Trace: [ 78.579503][ T25] nf_unregister_net_hooks+0x117/0x160 [ 78.586724][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.594482][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 78.600272][ T25] cleanup_net+0x451/0xb10 [ 78.606717][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.612877][ T25] process_one_work+0x98d/0x1600 [ 78.618498][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.625910][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 78.633697][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 78.639346][ T25] worker_thread+0x64c/0x1120 [ 78.645863][ T25] ? process_one_work+0x1600/0x1600 [ 78.652075][ T25] kthread+0x3b1/0x4a0 [ 78.656340][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 78.662610][ T25] ret_from_fork+0x1f/0x30 [ 78.667152][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 78.674003][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 78.682353][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.693070][ T25] Workqueue: netns cleanup_net [ 78.698381][ T25] Call Trace: [ 78.701846][ T25] dump_stack+0x141/0x1d7 [ 78.706217][ T25] panic+0x306/0x73d [ 78.710299][ T25] ? __warn_printk+0xf3/0xf3 [ 78.715357][ T25] ? __warn.cold+0x1a/0x44 [ 78.719789][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.725614][ T25] __warn.cold+0x35/0x44 [ 78.729869][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.735618][ T25] report_bug+0x1bd/0x210 [ 78.739973][ T25] handle_bug+0x3c/0x60 [ 78.744249][ T25] exc_invalid_op+0x14/0x40 [ 78.749038][ T25] asm_exc_invalid_op+0x12/0x20 [ 78.754094][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.760883][ T25] 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 40 4d 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 19 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.782364][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 78.789100][ T25] RAX: 0000000000000000 RBX: ffff8880240bfc00 RCX: 0000000000000000 [ 78.798641][ T25] RDX: ffff888015753880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 78.809001][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.818110][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88802b538f20 [ 78.827014][ T25] R13: 0000000000000000 R14: ffff88801ad41100 R15: 0000000000000001 [ 78.835105][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 78.840743][ T25] ? vprintk+0x95/0x260 [ 78.845337][ T25] nf_unregister_net_hooks+0x117/0x160 [ 78.850915][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.857187][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 78.863697][ T25] cleanup_net+0x451/0xb10 [ 78.868347][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.874329][ T25] process_one_work+0x98d/0x1600 [ 78.879312][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.884834][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 78.890056][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 78.895120][ T25] worker_thread+0x64c/0x1120 [ 78.900131][ T25] ? process_one_work+0x1600/0x1600 [ 78.905479][ T25] kthread+0x3b1/0x4a0 [ 78.909823][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 78.914955][ T25] ret_from_fork+0x1f/0x30 [ 78.920763][ T25] Kernel Offset: disabled [ 78.925499][ T25] Rebooting in 86400 seconds..