[ 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... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.227' (ECDSA) to the list of known hosts. 2021/04/29 23:01:34 fuzzer started 2021/04/29 23:01:34 connecting to host at 10.128.0.169:45035 2021/04/29 23:01:34 checking machine... 2021/04/29 23:01:34 checking revisions... 2021/04/29 23:01:34 testing simple program... syzkaller login: [ 76.318898][ T8416] chnl_net:caif_netlink_parms(): no params data found [ 76.373727][ T8416] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.381505][ T8416] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.390480][ T8416] device bridge_slave_0 entered promiscuous mode [ 76.401710][ T8416] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.409383][ T8416] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.418459][ T8416] device bridge_slave_1 entered promiscuous mode [ 76.440243][ T8416] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.454011][ T8416] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.478601][ T8416] team0: Port device team_slave_0 added [ 76.487503][ T8416] team0: Port device team_slave_1 added [ 76.506491][ T8416] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.514857][ T8416] 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. [ 76.543239][ T8416] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.558188][ T8416] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.566605][ T8416] 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. [ 76.594296][ T8416] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.623448][ T8416] device hsr_slave_0 entered promiscuous mode [ 76.631390][ T8416] device hsr_slave_1 entered promiscuous mode [ 76.737943][ T8416] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.748990][ T8416] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.759711][ T8416] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.769852][ T8416] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.796950][ T8416] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.804631][ T8416] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.813523][ T8416] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.821079][ T8416] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.868938][ T8416] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.886660][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.901352][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.911817][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.921108][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.935705][ T8416] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.964688][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.974014][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.981274][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.990522][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.000364][ T7] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.008000][ T7] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.016658][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.028299][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.037412][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.057779][ T8416] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 77.070557][ T8416] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 77.086606][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.096281][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.108168][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.133166][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.140797][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.156734][ T8416] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.179536][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.199951][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.211480][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.220664][ T8636] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.234049][ T8416] device veth0_vlan entered promiscuous mode [ 77.249118][ T8416] device veth1_vlan entered promiscuous mode [ 77.275193][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 77.285531][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 77.295372][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.307822][ T8416] device veth0_macvtap entered promiscuous mode [ 77.319119][ T8416] device veth1_macvtap entered promiscuous mode [ 77.337911][ T8416] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.347305][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.357862][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.373044][ T8416] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.381241][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.391501][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.405810][ T8416] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.415619][ T8416] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.431547][ T8416] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.441329][ T8416] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.542009][ T104] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.553105][ T104] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.579296][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready executing program [ 77.609528][ T9] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.618463][ T9] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.629385][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/29 23:01:37 building call list... [ 78.258186][ T9] ------------[ cut here ]------------ [ 78.270720][ T9] hook not found, pf 3 num 0 [ 78.271484][ T9] WARNING: CPU: 0 PID: 9 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 78.289448][ T9] Modules linked in: [ 78.296957][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 78.307514][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.319448][ T9] Workqueue: netns cleanup_net [ 78.326235][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.334669][ 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 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 [ 78.356918][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 78.365596][ T9] RAX: 0000000000000000 RBX: ffff888021ab8100 RCX: 0000000000000000 [ 78.375491][ T9] RDX: ffff888011d78000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 78.389209][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.399724][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880191d0f20 [ 78.409294][ T9] R13: 0000000000000000 R14: ffff88801fb0a000 R15: 0000000000000001 [ 78.418756][ T9] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 78.429588][ T9] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.438381][ T9] CR2: 00007fdc3abb5000 CR3: 0000000013ef3000 CR4: 00000000001506f0 [ 78.447872][ T9] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.457462][ T9] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.477173][ T9] Call Trace: [ 78.480571][ T9] nf_unregister_net_hooks+0x117/0x160 [ 78.488375][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.495646][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 78.501325][ T9] cleanup_net+0x451/0xb10 [ 78.508945][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.516091][ T9] process_one_work+0x98d/0x1600 [ 78.521268][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.528843][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 78.535170][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 78.540666][ T9] worker_thread+0x64c/0x1120 [ 78.550617][ T9] ? process_one_work+0x1600/0x1600 [ 78.557254][ T9] kthread+0x3b1/0x4a0 [ 78.561648][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 78.569512][ T9] ret_from_fork+0x1f/0x30 [ 78.575248][ T9] Kernel panic - not syncing: panic_on_warn set ... [ 78.582375][ T9] CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-syzkaller #0 [ 78.590735][ T9] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.601331][ T9] Workqueue: netns cleanup_net [ 78.606205][ T9] Call Trace: [ 78.609507][ T9] dump_stack+0x141/0x1d7 [ 78.614201][ T9] panic+0x306/0x73d [ 78.618197][ T9] ? __warn_printk+0xf3/0xf3 [ 78.623255][ T9] ? __warn.cold+0x1a/0x44 [ 78.628067][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.633913][ T9] __warn.cold+0x35/0x44 [ 78.638304][ T9] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.644051][ T9] report_bug+0x1bd/0x210 [ 78.648842][ T9] handle_bug+0x3c/0x60 [ 78.653102][ T9] exc_invalid_op+0x14/0x40 [ 78.657887][ T9] asm_exc_invalid_op+0x12/0x20 [ 78.663106][ T9] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.669621][ 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 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 [ 78.690004][ T9] RSP: 0018:ffffc90000ce7bc0 EFLAGS: 00010286 [ 78.696191][ T9] RAX: 0000000000000000 RBX: ffff888021ab8100 RCX: 0000000000000000 [ 78.704189][ T9] RDX: ffff888011d78000 RSI: ffffffff815c8ba5 RDI: fffff5200019cf6a [ 78.712442][ T9] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.720640][ T9] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff8880191d0f20 [ 78.729195][ T9] R13: 0000000000000000 R14: ffff88801fb0a000 R15: 0000000000000001 [ 78.737285][ T9] ? wake_up_klogd.part.0+0x8e/0xd0 [ 78.742876][ T9] ? vprintk+0x95/0x260 [ 78.747245][ T9] nf_unregister_net_hooks+0x117/0x160 [ 78.753016][ T9] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.759214][ T9] ? arptable_filter_net_exit+0x20/0x20 [ 78.764896][ T9] cleanup_net+0x451/0xb10 [ 78.769463][ T9] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.774889][ T9] process_one_work+0x98d/0x1600 [ 78.780307][ T9] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.786051][ T9] ? rwlock_bug.part.0+0x90/0x90 [ 78.791010][ T9] ? _raw_spin_lock_irq+0x41/0x50 [ 78.796147][ T9] worker_thread+0x64c/0x1120 [ 78.801039][ T9] ? process_one_work+0x1600/0x1600 [ 78.806426][ T9] kthread+0x3b1/0x4a0 [ 78.810505][ T9] ? __kthread_bind_mask+0xc0/0xc0 [ 78.815715][ T9] ret_from_fork+0x1f/0x30 [ 78.822375][ T9] Kernel Offset: disabled [ 78.827595][ T9] Rebooting in 86400 seconds..