[ OK ] Started Regular background program processing daemon. Starting getty on tty2-tty6 if dbus and logind are not available... [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. Starting Permit User Sessions... [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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. Warning: Permanently added '10.128.1.24' (ECDSA) to the list of known hosts. 2021/05/04 00:06:32 fuzzer started 2021/05/04 00:06:32 connecting to host at 10.128.0.169:42879 2021/05/04 00:06:32 checking machine... 2021/05/04 00:06:32 checking revisions... 2021/05/04 00:06:32 testing simple program... Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 80.162072][ T37] audit: type=1400 audit(1620086793.000:8): avc: denied { execmem } for pid=8406 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 81.558690][ T8407] chnl_net:caif_netlink_parms(): no params data found [ 81.619516][ T8407] bridge0: port 1(bridge_slave_0) entered blocking state [ 81.630467][ T8407] bridge0: port 1(bridge_slave_0) entered disabled state [ 81.641761][ T8407] device bridge_slave_0 entered promiscuous mode [ 81.653609][ T8407] bridge0: port 2(bridge_slave_1) entered blocking state [ 81.666661][ T8407] bridge0: port 2(bridge_slave_1) entered disabled state [ 81.676581][ T8407] device bridge_slave_1 entered promiscuous mode [ 81.700643][ T8407] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 81.714293][ T8407] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 81.741298][ T8407] team0: Port device team_slave_0 added [ 81.750758][ T8407] team0: Port device team_slave_1 added [ 81.771710][ T8407] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 81.785452][ T8407] 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. [ 81.821387][ T8407] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 81.838332][ T8407] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 81.846607][ T8407] 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. [ 81.886223][ T8407] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 81.923516][ T8407] device hsr_slave_0 entered promiscuous mode [ 81.934234][ T8407] device hsr_slave_1 entered promiscuous mode [ 82.080380][ T8407] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 82.097615][ T8407] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 82.119253][ T8407] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 82.133650][ T8407] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 82.187039][ T8407] bridge0: port 2(bridge_slave_1) entered blocking state [ 82.202246][ T8407] bridge0: port 2(bridge_slave_1) entered forwarding state [ 82.217500][ T8407] bridge0: port 1(bridge_slave_0) entered blocking state [ 82.233909][ T8407] bridge0: port 1(bridge_slave_0) entered forwarding state [ 82.302744][ T8407] 8021q: adding VLAN 0 to HW filter on device bond0 [ 82.329638][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 82.350993][ T27] bridge0: port 1(bridge_slave_0) entered disabled state [ 82.367175][ T27] bridge0: port 2(bridge_slave_1) entered disabled state [ 82.387642][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 82.419889][ T8407] 8021q: adding VLAN 0 to HW filter on device team0 [ 82.441712][ T3151] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 82.459882][ T3151] bridge0: port 1(bridge_slave_0) entered blocking state [ 82.476967][ T3151] bridge0: port 1(bridge_slave_0) entered forwarding state [ 82.497616][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 82.514793][ T27] bridge0: port 2(bridge_slave_1) entered blocking state [ 82.527747][ T27] bridge0: port 2(bridge_slave_1) entered forwarding state [ 82.542488][ T3151] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 82.571021][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 82.583994][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 82.599002][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 82.611774][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 82.622776][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 82.639927][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 82.662557][ T8407] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 82.678139][ T8407] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 82.696287][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 82.707141][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 82.718834][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 82.729096][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 82.742140][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 82.762512][ T3151] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 82.772197][ T3151] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 82.789475][ T8407] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 82.819125][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 82.833413][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 82.855343][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 82.865204][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 82.879663][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 82.890319][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 82.902959][ T8407] device veth0_vlan entered promiscuous mode [ 82.920213][ T8407] device veth1_vlan entered promiscuous mode [ 82.946442][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 82.956893][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 82.968149][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 82.981350][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 82.996949][ T8407] device veth0_macvtap entered promiscuous mode [ 83.011111][ T8407] device veth1_macvtap entered promiscuous mode [ 83.035715][ T8407] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 83.053689][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 83.065848][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 83.077718][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 83.089615][ T4841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 83.104585][ T8407] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 83.118873][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 83.133400][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 83.149353][ T8407] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.170585][ T8407] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.183758][ T8407] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.195867][ T8407] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 83.327473][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 83.350500][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 83.373049][ T3163] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 83.387093][ T3151] Bluetooth: hci0: command 0x0409 tx timeout [ 83.396170][ T9] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 83.409909][ T9] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 83.425111][ T3163] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/04 00:06:36 building call list... [ 84.118456][ T9] ------------[ cut here ]------------ [ 84.124428][ T9] hook not found, pf 3 num 0 [ 84.125069][ T9] WARNING: CPU: 0 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 84.147435][ T9] Modules linked in: [ 84.153564][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 84.167300][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.180159][ T9] Workqueue: netns cleanup_net [ 84.187714][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 84.195027][ 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 97 6d 8a e8 70 36 8a 01 <0f> 0b e9 e5 00 00 00 e8 c9 32 2d fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 84.220395][ T9] RSP: 0018:ffffc90000cffbc0 EFLAGS: 00010286 [ 84.229647][ T9] RAX: 0000000000000000 RBX: ffff88802715bc00 RCX: 0000000000000000 [ 84.239721][ T9] RDX: ffff8880124b4240 RSI: ffffffff815bdf85 RDI: fffff5200019ff6a [ 84.251789][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 84.262530][ T9] R10: ffffffff815b7dbe R11: 0000000000000000 R12: ffff88802bac8f60 [ 84.278423][ T9] R13: 0000000000000000 R14: ffff888013809d80 R15: 0000000000000001 [ 84.289077][ T9] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 84.302209][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 84.311385][ T9] CR2: 00007f27b4dd3000 CR3: 000000002f72e000 CR4: 00000000001506f0 [ 84.323813][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 84.339400][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 84.352370][ T9] Call Trace: [ 84.359545][ T9] nf_unregister_net_hooks+0x117/0x160 [ 84.366964][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 84.374130][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 84.382993][ T9] cleanup_net+0x451/0xb10 [ 84.389633][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 84.395603][ T9] process_one_work+0x98d/0x1600 [ 84.404471][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 84.412716][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 84.421785][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 84.429518][ T9] worker_thread+0x64c/0x1120 [ 84.439635][ T9] ? process_one_work+0x1600/0x1600 [ 84.449124][ T9] kthread+0x3b1/0x4a0 [ 84.454444][ T9] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 84.463775][ T9] ret_from_fork+0x1f/0x30 [ 84.470460][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 84.479716][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 84.489339][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 84.503592][ T9] Workqueue: netns cleanup_net [ 84.509455][ T9] Call Trace: [ 84.513771][ T9] dump_stack+0x141/0x1d7 [ 84.519501][ T9] panic+0x306/0x73d [ 84.523722][ T9] ? __warn_printk+0xf3/0xf3 [ 84.528631][ T9] ? __warn.cold+0x1a/0x44 [ 84.533693][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 84.541019][ T9] __warn.cold+0x35/0x44 [ 84.547097][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 84.555234][ T9] report_bug+0x1bd/0x210 [ 84.560957][ T9] handle_bug+0x3c/0x60 [ 84.565487][ T9] exc_invalid_op+0x14/0x40 [ 84.570657][ T9] asm_exc_invalid_op+0x12/0x20 [ 84.578194][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 84.585650][ 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 97 6d 8a e8 70 36 8a 01 <0f> 0b e9 e5 00 00 00 e8 c9 32 2d fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 84.608789][ T9] RSP: 0018:ffffc90000cffbc0 EFLAGS: 00010286 [ 84.615715][ T9] RAX: 0000000000000000 RBX: ffff88802715bc00 RCX: 0000000000000000 [ 84.625315][ T9] RDX: ffff8880124b4240 RSI: ffffffff815bdf85 RDI: fffff5200019ff6a [ 84.634244][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 84.644431][ T9] R10: ffffffff815b7dbe R11: 0000000000000000 R12: ffff88802bac8f60 [ 84.654864][ T9] R13: 0000000000000000 R14: ffff888013809d80 R15: 0000000000000001 [ 84.665748][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 84.672255][ T9] ? vprintk+0x95/0x260 [ 84.677840][ T9] nf_unregister_net_hooks+0x117/0x160 [ 84.685094][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 84.691977][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 84.698750][ T9] cleanup_net+0x451/0xb10 [ 84.703379][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 84.709303][ T9] process_one_work+0x98d/0x1600 [ 84.714744][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 84.720483][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 84.726318][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 84.731749][ T9] worker_thread+0x64c/0x1120 [ 84.736709][ T9] ? process_one_work+0x1600/0x1600 [ 84.742111][ T9] kthread+0x3b1/0x4a0 [ 84.746458][ T9] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 84.753111][ T9] ret_from_fork+0x1f/0x30 [ 84.759588][ T9] Kernel Offset: disabled [ 84.764485][ T9] Rebooting in 86400 seconds..