[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.47' (ECDSA) to the list of known hosts. 2021/05/07 22:34:33 fuzzer started 2021/05/07 22:34:33 connecting to host at 10.128.0.169:34661 2021/05/07 22:34:33 checking machine... 2021/05/07 22:34:33 checking revisions... 2021/05/07 22:34:33 testing simple program... syzkaller login: [ 133.629348][ T8409] chnl_net:caif_netlink_parms(): no params data found [ 133.681777][ T8409] bridge0: port 1(bridge_slave_0) entered blocking state [ 133.690223][ T8409] bridge0: port 1(bridge_slave_0) entered disabled state [ 133.699589][ T8409] device bridge_slave_0 entered promiscuous mode [ 133.710150][ T8409] bridge0: port 2(bridge_slave_1) entered blocking state [ 133.717676][ T8409] bridge0: port 2(bridge_slave_1) entered disabled state [ 133.726287][ T8409] device bridge_slave_1 entered promiscuous mode [ 133.746787][ T8409] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 133.758219][ T8409] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 133.782357][ T8409] team0: Port device team_slave_0 added [ 133.790969][ T8409] team0: Port device team_slave_1 added [ 133.809810][ T8409] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 133.817238][ T8409] 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. [ 133.843394][ T8409] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 133.857715][ T8409] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 133.865516][ T8409] 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. [ 133.892385][ T8409] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 133.919893][ T8409] device hsr_slave_0 entered promiscuous mode [ 133.926831][ T8409] device hsr_slave_1 entered promiscuous mode [ 134.031405][ T8409] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 134.042094][ T8409] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 134.052730][ T8409] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 134.066069][ T8409] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 134.092519][ T8409] bridge0: port 2(bridge_slave_1) entered blocking state [ 134.099873][ T8409] bridge0: port 2(bridge_slave_1) entered forwarding state [ 134.107755][ T8409] bridge0: port 1(bridge_slave_0) entered blocking state [ 134.114894][ T8409] bridge0: port 1(bridge_slave_0) entered forwarding state [ 134.160828][ T8409] 8021q: adding VLAN 0 to HW filter on device bond0 [ 134.175332][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 134.188526][ T3148] bridge0: port 1(bridge_slave_0) entered disabled state [ 134.197481][ T3148] bridge0: port 2(bridge_slave_1) entered disabled state [ 134.206723][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 134.220874][ T8409] 8021q: adding VLAN 0 to HW filter on device team0 [ 134.232034][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 134.241976][ T36] bridge0: port 1(bridge_slave_0) entered blocking state [ 134.249249][ T36] bridge0: port 1(bridge_slave_0) entered forwarding state [ 134.265321][ T3148] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 134.274835][ T3148] bridge0: port 2(bridge_slave_1) entered blocking state [ 134.281909][ T3148] bridge0: port 2(bridge_slave_1) entered forwarding state [ 134.306345][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 134.315532][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 134.324485][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 134.332879][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 134.347553][ T4839] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 134.358567][ T8409] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 134.377467][ T4839] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 134.385254][ T4839] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 134.400338][ T8409] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 134.424170][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 134.441282][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 134.450046][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 134.459183][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 134.470944][ T8409] device veth0_vlan entered promiscuous mode [ 134.483263][ T8409] device veth1_vlan entered promiscuous mode [ 134.506488][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 134.515524][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 134.524205][ T8629] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 134.535405][ T8409] device veth0_macvtap entered promiscuous mode [ 134.546341][ T8409] device veth1_macvtap entered promiscuous mode [ 134.566021][ T8409] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 134.575993][ T8630] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 134.586161][ T8630] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 134.600188][ T8409] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 134.608014][ T4839] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 134.620465][ T8409] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 134.629604][ T8409] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 134.641479][ T8409] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 134.650663][ T8409] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 134.755861][ T98] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 134.774224][ T98] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 134.788216][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 134.807839][ T98] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 134.816173][ T98] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 134.825859][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/07 22:34:36 building call list... [ 135.510186][ T25] ------------[ cut here ]------------ [ 135.517727][ T25] hook not found, pf 3 num 0 [ 135.518373][ T25] WARNING: CPU: 0 PID: 25 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 135.535338][ T25] Modules linked in: [ 135.539288][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 135.548131][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 135.559038][ T25] Workqueue: netns cleanup_net [ 135.565330][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 135.571702][ 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 [ 135.594029][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 135.600153][ T25] RAX: 0000000000000000 RBX: ffff88814a07f800 RCX: 0000000000000000 [ 135.611413][ T25] RDX: ffff888015b6b880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 135.622319][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 135.631865][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801c958f20 [ 135.641864][ T25] R13: 0000000000000000 R14: ffff888022516980 R15: 0000000000000001 [ 135.651486][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 135.661719][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 135.668987][ T25] CR2: 00007fcf12ced210 CR3: 00000000290dc000 CR4: 00000000001506f0 [ 135.678001][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 135.687686][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 135.697111][ T25] Call Trace: [ 135.700426][ T25] nf_unregister_net_hooks+0x117/0x160 [ 135.707303][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 135.713245][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 135.719995][ T25] cleanup_net+0x451/0xb10 [ 135.725423][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 135.730858][ T25] process_one_work+0x98d/0x1600 [ 135.736894][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 135.742340][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 135.750925][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 135.756716][ T25] worker_thread+0x64c/0x1120 [ 135.761546][ T25] ? process_one_work+0x1600/0x1600 [ 135.779989][ T25] kthread+0x3b1/0x4a0 [ 135.784966][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 135.790122][ T25] ret_from_fork+0x1f/0x30 [ 135.795834][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 135.802443][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 135.810443][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 135.820517][ T25] Workqueue: netns cleanup_net [ 135.825308][ T25] Call Trace: [ 135.828600][ T25] dump_stack+0x141/0x1d7 [ 135.832949][ T25] panic+0x306/0x73d [ 135.836890][ T25] ? __warn_printk+0xf3/0xf3 [ 135.841514][ T25] ? __warn.cold+0x1a/0x44 [ 135.845947][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 135.851709][ T25] __warn.cold+0x35/0x44 [ 135.855966][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 135.861706][ T25] report_bug+0x1bd/0x210 [ 135.866063][ T25] handle_bug+0x3c/0x60 [ 135.870238][ T25] exc_invalid_op+0x14/0x40 [ 135.874755][ T25] asm_exc_invalid_op+0x12/0x20 [ 135.879625][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 135.885973][ 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 [ 135.905599][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 135.911685][ T25] RAX: 0000000000000000 RBX: ffff88814a07f800 RCX: 0000000000000000 [ 135.919672][ T25] RDX: ffff888015b6b880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 135.927665][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 135.935643][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff88801c958f20 [ 135.943629][ T25] R13: 0000000000000000 R14: ffff888022516980 R15: 0000000000000001 [ 135.951621][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 135.956938][ T25] ? vprintk+0x95/0x260 [ 135.961129][ T25] nf_unregister_net_hooks+0x117/0x160 [ 135.966619][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 135.972555][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 135.978119][ T25] cleanup_net+0x451/0xb10 [ 135.982561][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 135.987970][ T25] process_one_work+0x98d/0x1600 [ 135.992939][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 135.998333][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 136.003306][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 136.008364][ T25] worker_thread+0x64c/0x1120 [ 136.013074][ T25] ? process_one_work+0x1600/0x1600 [ 136.018293][ T25] kthread+0x3b1/0x4a0 [ 136.022380][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 136.027516][ T25] ret_from_fork+0x1f/0x30 [ 136.033016][ T25] Kernel Offset: disabled [ 136.037557][ T25] Rebooting in 86400 seconds..