[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.240' (ECDSA) to the list of known hosts. 2021/05/03 15:53:58 fuzzer started 2021/05/03 15:53:58 connecting to host at 10.128.0.169:34069 2021/05/03 15:53:58 checking machine... 2021/05/03 15:53:58 checking revisions... 2021/05/03 15:53:58 testing simple program... syzkaller login: [ 71.624455][ T8439] chnl_net:caif_netlink_parms(): no params data found [ 71.709239][ T8439] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.718669][ T8439] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.727971][ T8439] device bridge_slave_0 entered promiscuous mode [ 71.738039][ T8439] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.746860][ T8439] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.754650][ T8439] device bridge_slave_1 entered promiscuous mode [ 71.775958][ T8439] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 71.787441][ T8439] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 71.810745][ T8439] team0: Port device team_slave_0 added [ 71.818743][ T8439] team0: Port device team_slave_1 added [ 71.836360][ T8439] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 71.843500][ T8439] 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. [ 71.870937][ T8439] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 71.886237][ T8439] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 71.893369][ T8439] 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. [ 71.919925][ T8439] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 71.950253][ T8439] device hsr_slave_0 entered promiscuous mode [ 71.958736][ T8439] device hsr_slave_1 entered promiscuous mode [ 72.071860][ T8439] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 72.089768][ T8439] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 72.101926][ T8439] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 72.111434][ T8439] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 72.142182][ T8439] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.149549][ T8439] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.158170][ T8439] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.165541][ T8439] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.220191][ T8439] 8021q: adding VLAN 0 to HW filter on device bond0 [ 72.235063][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 72.249320][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.258019][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.267485][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 72.281647][ T8439] 8021q: adding VLAN 0 to HW filter on device team0 [ 72.300985][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 72.311589][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.318826][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 72.346369][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 72.360057][ T8659] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.367423][ T8659] bridge0: port 2(bridge_slave_1) entered forwarding state [ 72.376238][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 72.387604][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 72.399389][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 72.413136][ T4296] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 72.429137][ T8439] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 72.442557][ T8439] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 72.452229][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 72.474750][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 72.482521][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 72.493975][ T8439] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 72.515971][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 72.537163][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 72.547577][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 72.557078][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 72.567527][ T8439] device veth0_vlan entered promiscuous mode [ 72.581743][ T8439] device veth1_vlan entered promiscuous mode [ 72.607903][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 72.618599][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 72.630147][ T8439] device veth0_macvtap entered promiscuous mode [ 72.642966][ T8439] device veth1_macvtap entered promiscuous mode [ 72.661166][ T8439] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 72.670592][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 72.681138][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 72.690055][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 72.699431][ T8659] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 72.711367][ T8439] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 72.720738][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 72.730436][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 72.741634][ T8439] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.753254][ T8439] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.769107][ T8439] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.779555][ T8439] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 72.870045][ T83] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 72.908772][ T83] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 72.931363][ T9] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 72.933246][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 72.945230][ T9] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 72.971229][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/03 15:54:01 building call list... [ 73.631250][ T9] ------------[ cut here ]------------ [ 73.648270][ T9] hook not found, pf 3 num 0 [ 73.648935][ T9] WARNING: CPU: 0 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 73.667164][ T9] Modules linked in: [ 73.671103][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-next-20210503-syzkaller #0 [ 73.682273][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.694281][ T9] Workqueue: netns cleanup_net [ 73.699105][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 73.706761][ 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 4d 6e 8a e8 18 71 8a 01 <0f> 0b e9 e5 00 00 00 e8 c9 d2 2c fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 73.734878][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 73.741305][ T9] RAX: 0000000000000000 RBX: ffff88814464d400 RCX: 0000000000000000 [ 73.758399][ T9] RDX: ffff888012380000 RSI: ffffffff815cc9f5 RDI: fffff5200019cf6a [ 73.767004][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 73.776682][ T9] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff88802fa28f20 [ 73.784867][ T9] R13: 0000000000000000 R14: ffff888019f4eb80 R15: 0000000000000001 [ 73.793094][ T9] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 73.817009][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.825758][ T9] CR2: 00007f96a6ab4e60 CR3: 0000000024738000 CR4: 00000000001506f0 [ 73.833968][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.841994][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.851919][ T9] Call Trace: [ 73.857091][ T9] nf_unregister_net_hooks+0x117/0x160 [ 73.862884][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 73.870555][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 73.886099][ T9] cleanup_net+0x451/0xb10 [ 73.890718][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 73.896420][ T9] process_one_work+0x98d/0x1600 [ 73.901410][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 73.908933][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 73.914759][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 73.919842][ T9] worker_thread+0x64c/0x1120 [ 73.928745][ T9] ? process_one_work+0x1600/0x1600 [ 73.935489][ T9] kthread+0x3b1/0x4a0 [ 73.939618][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 73.948043][ T9] ret_from_fork+0x1f/0x30 [ 73.952560][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 73.959164][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-next-20210503-syzkaller #0 [ 73.968290][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.978387][ T9] Workqueue: netns cleanup_net [ 73.983180][ T9] Call Trace: [ 73.986471][ T9] dump_stack+0x141/0x1d7 [ 73.990830][ T9] panic+0x306/0x73d [ 73.994788][ T9] ? __warn_printk+0xf3/0xf3 [ 73.999429][ T9] ? __warn.cold+0x1a/0x44 [ 74.003868][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 74.009779][ T9] __warn.cold+0x35/0x44 [ 74.014040][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 74.019779][ T9] report_bug+0x1bd/0x210 [ 74.024248][ T9] handle_bug+0x3c/0x60 [ 74.028516][ T9] exc_invalid_op+0x14/0x40 [ 74.033159][ T9] asm_exc_invalid_op+0x12/0x20 [ 74.038128][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 74.044480][ 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 4d 6e 8a e8 18 71 8a 01 <0f> 0b e9 e5 00 00 00 e8 c9 d2 2c fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 74.064454][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 74.070537][ T9] RAX: 0000000000000000 RBX: ffff88814464d400 RCX: 0000000000000000 [ 74.078526][ T9] RDX: ffff888012380000 RSI: ffffffff815cc9f5 RDI: fffff5200019cf6a [ 74.086603][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 74.094708][ T9] R10: ffffffff815c685e R11: 0000000000000000 R12: ffff88802fa28f20 [ 74.102821][ T9] R13: 0000000000000000 R14: ffff888019f4eb80 R15: 0000000000000001 [ 74.110836][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 74.116238][ T9] ? vprintk+0x95/0x260 [ 74.120664][ T9] nf_unregister_net_hooks+0x117/0x160 [ 74.126144][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 74.132185][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 74.137746][ T9] cleanup_net+0x451/0xb10 [ 74.142388][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 74.147962][ T9] process_one_work+0x98d/0x1600 [ 74.152975][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 74.158461][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 74.163414][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 74.168467][ T9] worker_thread+0x64c/0x1120 [ 74.173193][ T9] ? process_one_work+0x1600/0x1600 [ 74.178434][ T9] kthread+0x3b1/0x4a0 [ 74.182528][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 74.187714][ T9] ret_from_fork+0x1f/0x30 [ 74.193690][ T9] Kernel Offset: disabled [ 74.198302][ T9] Rebooting in 86400 seconds..