[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.1.118' (ECDSA) to the list of known hosts. 2021/05/01 00:10:56 fuzzer started 2021/05/01 00:10:56 connecting to host at 10.128.0.169:37399 2021/05/01 00:10:56 checking machine... 2021/05/01 00:10:56 checking revisions... 2021/05/01 00:10:56 testing simple program... syzkaller login: [ 85.518606][ T8421] chnl_net:caif_netlink_parms(): no params data found [ 85.571646][ T8421] bridge0: port 1(bridge_slave_0) entered blocking state [ 85.581257][ T8421] bridge0: port 1(bridge_slave_0) entered disabled state [ 85.591229][ T8421] device bridge_slave_0 entered promiscuous mode [ 85.603373][ T8421] bridge0: port 2(bridge_slave_1) entered blocking state [ 85.614535][ T8421] bridge0: port 2(bridge_slave_1) entered disabled state [ 85.624746][ T8421] device bridge_slave_1 entered promiscuous mode [ 85.648054][ T8421] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 85.660696][ T8421] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 85.690397][ T8421] team0: Port device team_slave_0 added [ 85.698732][ T8421] team0: Port device team_slave_1 added [ 85.720376][ T8421] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 85.728382][ T8421] 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. [ 85.758241][ T8421] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 85.771848][ T8421] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 85.780800][ T8421] 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. [ 85.808970][ T8421] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 85.837848][ T8421] device hsr_slave_0 entered promiscuous mode [ 85.846121][ T8421] device hsr_slave_1 entered promiscuous mode [ 85.956086][ T8421] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 85.967837][ T8421] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 85.980604][ T8421] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 85.990838][ T8421] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 86.020957][ T8421] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.029849][ T8421] bridge0: port 2(bridge_slave_1) entered forwarding state [ 86.038758][ T8421] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.046662][ T8421] bridge0: port 1(bridge_slave_0) entered forwarding state [ 86.099896][ T8421] 8021q: adding VLAN 0 to HW filter on device bond0 [ 86.115260][ T3409] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 86.128132][ T3409] bridge0: port 1(bridge_slave_0) entered disabled state [ 86.138545][ T3409] bridge0: port 2(bridge_slave_1) entered disabled state [ 86.150063][ T3409] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 86.165282][ T8421] 8021q: adding VLAN 0 to HW filter on device team0 [ 86.179193][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 86.188009][ T3165] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.195546][ T3165] bridge0: port 1(bridge_slave_0) entered forwarding state [ 86.213181][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 86.224117][ T3165] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.231495][ T3165] bridge0: port 2(bridge_slave_1) entered forwarding state [ 86.261612][ T8421] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 86.275491][ T8421] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 86.291939][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 86.303994][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 86.314456][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 86.325070][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 86.334421][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 86.343724][ T3165] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 86.364449][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 86.374006][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 86.390921][ T8421] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 86.416357][ T8644] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 86.438096][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 86.448174][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 86.458426][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 86.471659][ T8421] device veth0_vlan entered promiscuous mode [ 86.486859][ T8421] device veth1_vlan entered promiscuous mode [ 86.496940][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 86.522328][ T8644] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 86.532198][ T8644] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 86.550613][ T8421] device veth0_macvtap entered promiscuous mode [ 86.561721][ T8421] device veth1_macvtap entered promiscuous mode [ 86.580981][ T8421] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 86.591740][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 86.601909][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 86.614065][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 86.624965][ T3408] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 86.640991][ T8421] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 86.650899][ T8644] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 86.661620][ T8644] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 86.676647][ T8421] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.687743][ T8421] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.697712][ T8421] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 86.707103][ T8421] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 86.812669][ T298] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.820931][ T298] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.861237][ T8644] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 86.880823][ T298] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 86.890479][ T298] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 86.900527][ T8644] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/01 00:10:59 building call list... [ 87.568131][ T25] ------------[ cut here ]------------ [ 87.579954][ T25] hook not found, pf 3 num 0 [ 87.580653][ T25] WARNING: CPU: 0 PID: 25 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 87.597676][ T25] Modules linked in: [ 87.605416][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 87.616088][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.628529][ T25] Workqueue: netns cleanup_net [ 87.634881][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 87.645227][ 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 78 6d 8a e8 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 87.671218][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 87.679529][ T25] RAX: 0000000000000000 RBX: ffff888021a94e00 RCX: 0000000000000000 [ 87.690392][ T25] RDX: ffff888011ee3880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 87.701181][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 87.711400][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888028640f20 [ 87.720991][ T25] R13: 0000000000000000 R14: ffff8880135e9100 R15: 0000000000000001 [ 87.732954][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 87.744162][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.751096][ T25] CR2: 000055bb60a44160 CR3: 000000002619b000 CR4: 00000000001506f0 [ 87.760333][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.770423][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.780891][ T25] Call Trace: [ 87.785315][ T25] nf_unregister_net_hooks+0x117/0x160 [ 87.791439][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 87.799929][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 87.809362][ T25] cleanup_net+0x451/0xb10 [ 87.816996][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 87.823729][ T25] process_one_work+0x98d/0x1600 [ 87.829110][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 87.837388][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 87.843588][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 87.849122][ T25] worker_thread+0x64c/0x1120 [ 87.858597][ T25] ? process_one_work+0x1600/0x1600 [ 87.865521][ T25] kthread+0x3b1/0x4a0 [ 87.870260][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 87.878163][ T25] ret_from_fork+0x1f/0x30 [ 87.888877][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 87.896787][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 [ 87.905311][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.915644][ T25] Workqueue: netns cleanup_net [ 87.920947][ T25] Call Trace: [ 87.924429][ T25] dump_stack+0x141/0x1d7 [ 87.929497][ T25] panic+0x306/0x73d [ 87.933738][ T25] ? __warn_printk+0xf3/0xf3 [ 87.938539][ T25] ? __warn.cold+0x1a/0x44 [ 87.944433][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 87.950548][ T25] __warn.cold+0x35/0x44 [ 87.955476][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 87.961635][ T25] report_bug+0x1bd/0x210 [ 87.966207][ T25] handle_bug+0x3c/0x60 [ 87.970566][ T25] exc_invalid_op+0x14/0x40 [ 87.975092][ T25] asm_exc_invalid_op+0x12/0x20 [ 87.979965][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 87.986580][ 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 78 6d 8a e8 40 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 88.006813][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 88.012992][ T25] RAX: 0000000000000000 RBX: ffff888021a94e00 RCX: 0000000000000000 [ 88.024510][ T25] RDX: ffff888011ee3880 RSI: ffffffff815c8ba5 RDI: fffff520001bff6a [ 88.033874][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 88.042065][ T25] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888028640f20 [ 88.050230][ T25] R13: 0000000000000000 R14: ffff8880135e9100 R15: 0000000000000001 [ 88.058593][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 88.064180][ T25] ? vprintk+0x95/0x260 [ 88.068788][ T25] nf_unregister_net_hooks+0x117/0x160 [ 88.074558][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 88.080771][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 88.087777][ T25] cleanup_net+0x451/0xb10 [ 88.092790][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 88.098600][ T25] process_one_work+0x98d/0x1600 [ 88.103679][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 88.109268][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 88.114412][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 88.119729][ T25] worker_thread+0x64c/0x1120 [ 88.124642][ T25] ? process_one_work+0x1600/0x1600 [ 88.129973][ T25] kthread+0x3b1/0x4a0 [ 88.134167][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 88.139783][ T25] ret_from_fork+0x1f/0x30 [ 88.146033][ T25] Kernel Offset: disabled [ 88.150700][ T25] Rebooting in 86400 seconds..