[ 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 '10.128.0.63' (ECDSA) to the list of known hosts. 2021/05/06 16:30:50 fuzzer started 2021/05/06 16:30:50 connecting to host at 10.128.0.169:33455 2021/05/06 16:30:50 checking machine... 2021/05/06 16:30:50 checking revisions... 2021/05/06 16:30:50 testing simple program... syzkaller login: [ 81.466184][ T8427] chnl_net:caif_netlink_parms(): no params data found [ 81.524800][ T8427] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.533145][ T8427] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.543072][ T8427] device bridge_slave_0 entered promiscuous mode [ 81.553376][ T8427] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.562450][ T8427] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.570626][ T8427] device bridge_slave_1 entered promiscuous mode [ 81.592088][ T8427] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 81.605035][ T8427] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 81.631388][ T8427] team0: Port device team_slave_0 added [ 81.641065][ T8427] team0: Port device team_slave_1 added [ 81.659980][ T8427] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 81.667566][ T8427] 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. [ 81.694940][ T8427] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 81.709545][ T8427] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 81.717224][ T8427] 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. [ 81.744681][ T8427] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 81.773180][ T8427] device hsr_slave_0 entered promiscuous mode [ 81.782848][ T8427] device hsr_slave_1 entered promiscuous mode [ 81.893231][ T8427] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 81.905526][ T8427] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 81.918404][ T8427] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 81.928829][ T8427] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 81.955608][ T8427] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.963175][ T8427] bridge0: port 2(bridge_slave_1) entered forwarding state [ 81.972348][ T8427] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.979890][ T8427] bridge0: port 1(bridge_slave_0) entered forwarding state [ 82.034487][ T8427] 8021q: adding VLAN 0 to HW filter on device bond0 [ 82.051564][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 82.065777][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 82.075686][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 82.084455][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 82.099723][ T8427] 8021q: adding VLAN 0 to HW filter on device team0 [ 82.115457][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 82.124783][ T36] bridge0: port 1(bridge_slave_0) entered blocking state [ 82.132674][ T36] bridge0: port 1(bridge_slave_0) entered forwarding state [ 82.145542][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 82.156508][ T36] bridge0: port 2(bridge_slave_1) entered blocking state [ 82.163980][ T36] bridge0: port 2(bridge_slave_1) entered forwarding state [ 82.190255][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 82.202648][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 82.221485][ T8427] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 82.235163][ T8427] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 82.252070][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 82.261359][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 82.271163][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 82.280342][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 82.300524][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 82.309291][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 82.326333][ T8427] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 82.348425][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 82.370074][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.380473][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.390448][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.402282][ T8427] device veth0_vlan entered promiscuous mode [ 82.416944][ T8427] device veth1_vlan entered promiscuous mode [ 82.440885][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 82.450415][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 82.466694][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 82.477043][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.487752][ T8427] device veth0_macvtap entered promiscuous mode [ 82.502405][ T8427] device veth1_macvtap entered promiscuous mode [ 82.522789][ T8427] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 82.532650][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 82.542407][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 82.553134][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 82.563282][ T4842] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 82.576915][ T8427] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 82.586386][ T8648] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready executing program [ 82.597526][ T8648] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 82.611114][ T8427] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.621313][ T8427] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.631416][ T8427] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.642712][ T8427] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 82.750173][ T3089] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.759361][ T3089] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.792564][ T8648] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 82.812520][ T3089] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 82.825618][ T3089] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 82.839539][ T8648] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/06 16:30:54 building call list... [ 83.499831][ T3089] ------------[ cut here ]------------ [ 83.505696][ T3089] hook not found, pf 3 num 0 [ 83.506395][ T3089] WARNING: CPU: 0 PID: 3089 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 83.526656][ T3089] Modules linked in: [ 83.532845][ T3089] CPU: 0 PID: 3089 Comm: kworker/u4:7 Not tainted 5.12.0-syzkaller #0 [ 83.543833][ T3089] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.559682][ T3089] Workqueue: netns cleanup_net [ 83.564966][ T3089] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 83.572265][ T3089] 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 70 4b 8a 01 <0f> 0b e9 e5 00 00 00 e8 89 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 83.605997][ T3089] RSP: 0018:ffffc90002a67bc0 EFLAGS: 00010286 [ 83.614724][ T3089] RAX: 0000000000000000 RBX: ffff888149e11800 RCX: 0000000000000000 [ 83.624569][ T3089] RDX: ffff88801e6ed4c0 RSI: ffffffff815c8ba5 RDI: fffff5200054cf6a [ 83.635776][ T3089] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 83.644990][ T3089] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880390c8f20 [ 83.657063][ T3089] R13: 0000000000000000 R14: ffff8880246ce680 R15: 0000000000000001 [ 83.666514][ T3089] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 83.681271][ T3089] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.688759][ T3089] CR2: 000000c000800000 CR3: 00000000187fb000 CR4: 00000000001506f0 [ 83.697023][ T3089] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.707486][ T3089] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.716688][ T3089] Call Trace: [ 83.722336][ T3089] nf_unregister_net_hooks+0x117/0x160 [ 83.728444][ T3089] arpt_unregister_table_pre_exit+0x67/0x80 [ 83.734537][ T3089] ? arptable_filter_net_exit+0x20/0x20 [ 83.742574][ T3089] cleanup_net+0x451/0xb10 [ 83.747407][ T3089] ? ops_free_list.part.0+0x3d0/0x3d0 [ 83.759210][ T3089] process_one_work+0x98d/0x1600 [ 83.764439][ T3089] ? pwq_dec_nr_in_flight+0x320/0x320 [ 83.770667][ T3089] ? rwlock_bug.part.0+0x90/0x90 [ 83.776065][ T3089] ? _raw_spin_lock_irq+0x41/0x50 [ 83.782628][ T3089] worker_thread+0x64c/0x1120 [ 83.787987][ T3089] ? __kthread_parkme+0x13f/0x1e0 [ 83.793378][ T3089] ? process_one_work+0x1600/0x1600 [ 83.799085][ T3089] kthread+0x3b1/0x4a0 [ 83.803444][ T3089] ? __kthread_bind_mask+0xc0/0xc0 [ 83.810106][ T3089] ret_from_fork+0x1f/0x30 [ 83.815033][ T3089] Kernel panic - not syncing: panic_on_warn set ... [ 83.821657][ T3089] CPU: 0 PID: 3089 Comm: kworker/u4:7 Not tainted 5.12.0-syzkaller #0 [ 83.830332][ T3089] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.840845][ T3089] Workqueue: netns cleanup_net [ 83.845719][ T3089] Call Trace: [ 83.849307][ T3089] dump_stack+0x141/0x1d7 [ 83.855516][ T3089] panic+0x306/0x73d [ 83.859617][ T3089] ? __warn_printk+0xf3/0xf3 [ 83.864967][ T3089] ? __warn.cold+0x1a/0x44 [ 83.870103][ T3089] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.876044][ T3089] __warn.cold+0x35/0x44 [ 83.880311][ T3089] ? __nf_unregister_net_hook+0x1eb/0x610 [ 83.886451][ T3089] report_bug+0x1bd/0x210 [ 83.891449][ T3089] handle_bug+0x3c/0x60 [ 83.895888][ T3089] exc_invalid_op+0x14/0x40 [ 83.900889][ T3089] asm_exc_invalid_op+0x12/0x20 [ 83.906369][ T3089] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 83.913432][ T3089] 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 70 4b 8a 01 <0f> 0b e9 e5 00 00 00 e8 89 17 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 83.935298][ T3089] RSP: 0018:ffffc90002a67bc0 EFLAGS: 00010286 [ 83.942457][ T3089] RAX: 0000000000000000 RBX: ffff888149e11800 RCX: 0000000000000000 [ 83.950463][ T3089] RDX: ffff88801e6ed4c0 RSI: ffffffff815c8ba5 RDI: fffff5200054cf6a [ 83.958657][ T3089] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 83.967150][ T3089] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880390c8f20 [ 83.975576][ T3089] R13: 0000000000000000 R14: ffff8880246ce680 R15: 0000000000000001 [ 83.983767][ T3089] ? wake_up_klogd.part.0+0x8e/0xd0 [ 83.989118][ T3089] ? vprintk+0x95/0x260 [ 83.993349][ T3089] nf_unregister_net_hooks+0x117/0x160 [ 83.998974][ T3089] arpt_unregister_table_pre_exit+0x67/0x80 [ 84.004985][ T3089] ? arptable_filter_net_exit+0x20/0x20 [ 84.010835][ T3089] cleanup_net+0x451/0xb10 [ 84.015287][ T3089] ? ops_free_list.part.0+0x3d0/0x3d0 [ 84.020693][ T3089] process_one_work+0x98d/0x1600 [ 84.025753][ T3089] ? pwq_dec_nr_in_flight+0x320/0x320 [ 84.031238][ T3089] ? rwlock_bug.part.0+0x90/0x90 [ 84.036200][ T3089] ? _raw_spin_lock_irq+0x41/0x50 [ 84.041252][ T3089] worker_thread+0x64c/0x1120 [ 84.045985][ T3089] ? __kthread_parkme+0x13f/0x1e0 [ 84.051026][ T3089] ? process_one_work+0x1600/0x1600 [ 84.056343][ T3089] kthread+0x3b1/0x4a0 [ 84.060533][ T3089] ? __kthread_bind_mask+0xc0/0xc0 [ 84.065929][ T3089] ret_from_fork+0x1f/0x30 [ 84.072396][ T3089] Kernel Offset: disabled [ 84.077610][ T3089] Rebooting in 86400 seconds..