[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.63' (ECDSA) to the list of known hosts. 2021/05/07 00:00:28 fuzzer started 2021/05/07 00:00:28 connecting to host at 10.128.0.169:44375 2021/05/07 00:00:28 checking machine... 2021/05/07 00:00:28 checking revisions... 2021/05/07 00:00:28 testing simple program... syzkaller login: [ 73.439681][ T8412] chnl_net:caif_netlink_parms(): no params data found [ 73.504696][ T8412] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.513323][ T8412] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.523333][ T8412] device bridge_slave_0 entered promiscuous mode [ 73.533724][ T8412] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.540970][ T8412] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.549752][ T8412] device bridge_slave_1 entered promiscuous mode [ 73.570285][ T8412] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.583268][ T8412] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.605973][ T8412] team0: Port device team_slave_0 added [ 73.614445][ T8412] team0: Port device team_slave_1 added [ 73.634804][ T8412] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.642155][ T8412] 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. [ 73.669431][ T8412] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.684413][ T8412] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.691948][ T8412] 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. [ 73.718705][ T8412] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.746326][ T8412] device hsr_slave_0 entered promiscuous mode [ 73.753161][ T8412] device hsr_slave_1 entered promiscuous mode [ 73.856439][ T8412] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.867117][ T8412] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.877971][ T8412] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.890376][ T8412] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.916309][ T8412] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.923598][ T8412] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.932113][ T8412] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.939205][ T8412] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.986195][ T8412] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.999149][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.012652][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.023678][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.032162][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.045682][ T8412] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.057251][ T4810] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.067861][ T4810] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.074980][ T4810] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.092727][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.102401][ T8] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.109456][ T8] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.123269][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.134335][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.144395][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.159101][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.171629][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.182994][ T8412] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.201601][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.209029][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.223681][ T8412] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.242768][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.264807][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.274835][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.283535][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.295441][ T8412] device veth0_vlan entered promiscuous mode [ 74.308407][ T8412] device veth1_vlan entered promiscuous mode [ 74.329321][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.338435][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.347591][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.360259][ T8412] device veth0_macvtap entered promiscuous mode [ 74.370389][ T8412] device veth1_macvtap entered promiscuous mode [ 74.390640][ T8412] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.399200][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.408966][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.422777][ T8412] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.430639][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.439879][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.452408][ T8412] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.461635][ T8412] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.470310][ T8412] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.480575][ T8412] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.588330][ T56] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.613144][ T56] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.625062][ T2940] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.640989][ T56] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.651619][ T56] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.662286][ T2940] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/07 00:00:31 building call list... [ 75.256918][ T56] ------------[ cut here ]------------ [ 75.267162][ T56] hook not found, pf 3 num 0 [ 75.267893][ T56] WARNING: CPU: 0 PID: 56 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 75.286803][ T56] Modules linked in: [ 75.290818][ T56] CPU: 0 PID: 56 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 75.301862][ T56] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.313084][ T56] Workqueue: netns cleanup_net [ 75.317973][ T56] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.326479][ T56] 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 50 5b 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.349128][ T56] RSP: 0018:ffffc90000f7fbc0 EFLAGS: 00010286 [ 75.357037][ T56] RAX: 0000000000000000 RBX: ffff88814a312b00 RCX: 0000000000000000 [ 75.366513][ T56] RDX: ffff8880153654c0 RSI: ffffffff815c8ba5 RDI: fffff520001eff6a [ 75.375768][ T56] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.384948][ T56] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888038790f20 [ 75.394086][ T56] R13: 0000000000000000 R14: ffff88801b517b00 R15: 0000000000000001 [ 75.403347][ T56] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 75.413484][ T56] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.420202][ T56] CR2: 00007f01cd000000 CR3: 0000000017e2d000 CR4: 00000000001506f0 [ 75.431025][ T56] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.439900][ T56] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.452438][ T56] Call Trace: [ 75.455854][ T56] nf_unregister_net_hooks+0x117/0x160 [ 75.462982][ T56] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.469035][ T56] ? arptable_filter_net_exit+0x20/0x20 [ 75.477553][ T56] cleanup_net+0x451/0xb10 [ 75.483243][ T56] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.488738][ T56] process_one_work+0x98d/0x1600 [ 75.495440][ T56] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.500974][ T56] ? rwlock_bug.part.0+0x90/0x90 [ 75.507642][ T56] ? _raw_spin_lock_irq+0x41/0x50 [ 75.517070][ T56] worker_thread+0x64c/0x1120 [ 75.522874][ T56] ? __kthread_parkme+0x13f/0x1e0 [ 75.528075][ T56] ? process_one_work+0x1600/0x1600 [ 75.535047][ T56] kthread+0x3b1/0x4a0 [ 75.539329][ T56] ? __kthread_bind_mask+0xc0/0xc0 [ 75.546224][ T56] ret_from_fork+0x1f/0x30 [ 75.550828][ T56] Kernel panic - not syncing: panic_on_warn set ... [ 75.557415][ T56] CPU: 0 PID: 56 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 75.565419][ T56] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.575486][ T56] Workqueue: netns cleanup_net [ 75.580275][ T56] Call Trace: [ 75.583558][ T56] dump_stack+0x141/0x1d7 [ 75.587902][ T56] panic+0x306/0x73d [ 75.591813][ T56] ? __warn_printk+0xf3/0xf3 [ 75.596431][ T56] ? __warn.cold+0x1a/0x44 [ 75.600866][ T56] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.606615][ T56] __warn.cold+0x35/0x44 [ 75.610877][ T56] ? __nf_unregister_net_hook+0x1eb/0x610 [ 75.616637][ T56] report_bug+0x1bd/0x210 [ 75.621106][ T56] handle_bug+0x3c/0x60 [ 75.625270][ T56] exc_invalid_op+0x14/0x40 [ 75.629905][ T56] asm_exc_invalid_op+0x12/0x20 [ 75.634783][ T56] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 75.641648][ T56] 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 50 5b 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 75.661271][ T56] RSP: 0018:ffffc90000f7fbc0 EFLAGS: 00010286 [ 75.667354][ T56] RAX: 0000000000000000 RBX: ffff88814a312b00 RCX: 0000000000000000 [ 75.675434][ T56] RDX: ffff8880153654c0 RSI: ffffffff815c8ba5 RDI: fffff520001eff6a [ 75.683418][ T56] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.692531][ T56] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888038790f20 [ 75.700515][ T56] R13: 0000000000000000 R14: ffff88801b517b00 R15: 0000000000000001 [ 75.708512][ T56] ? wake_up_klogd.part.0+0x8e/0xd0 [ 75.713744][ T56] ? vprintk+0x95/0x260 [ 75.717932][ T56] nf_unregister_net_hooks+0x117/0x160 [ 75.723527][ T56] arpt_unregister_table_pre_exit+0x67/0x80 [ 75.729445][ T56] ? arptable_filter_net_exit+0x20/0x20 [ 75.735093][ T56] cleanup_net+0x451/0xb10 [ 75.739613][ T56] ? ops_free_list.part.0+0x3d0/0x3d0 [ 75.745098][ T56] process_one_work+0x98d/0x1600 [ 75.750063][ T56] ? pwq_dec_nr_in_flight+0x320/0x320 [ 75.755459][ T56] ? rwlock_bug.part.0+0x90/0x90 [ 75.760418][ T56] ? _raw_spin_lock_irq+0x41/0x50 [ 75.765469][ T56] worker_thread+0x64c/0x1120 [ 75.770260][ T56] ? __kthread_parkme+0x13f/0x1e0 [ 75.775293][ T56] ? process_one_work+0x1600/0x1600 [ 75.780507][ T56] kthread+0x3b1/0x4a0 [ 75.784585][ T56] ? __kthread_bind_mask+0xc0/0xc0 [ 75.789817][ T56] ret_from_fork+0x1f/0x30 [ 75.795292][ T56] Kernel Offset: disabled [ 75.799862][ T56] Rebooting in 86400 seconds..