[ 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. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.94' (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 10.128.0.169:40767 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: [ 75.228882][ T8410] chnl_net:caif_netlink_parms(): no params data found [ 75.279554][ T8410] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.288645][ T8410] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.298843][ T8410] device bridge_slave_0 entered promiscuous mode [ 75.310397][ T8410] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.321675][ T8410] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.330639][ T8410] device bridge_slave_1 entered promiscuous mode [ 75.353808][ T8410] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.367658][ T8410] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 75.392863][ T8410] team0: Port device team_slave_0 added [ 75.403178][ T8410] team0: Port device team_slave_1 added [ 75.423050][ T8410] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 75.431430][ T8410] 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. [ 75.460259][ T8410] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 75.475685][ T8410] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 75.484233][ T8410] 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. [ 75.515562][ T8410] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 75.544949][ T8410] device hsr_slave_0 entered promiscuous mode [ 75.553271][ T8410] device hsr_slave_1 entered promiscuous mode [ 75.673585][ T8410] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 75.692542][ T8410] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.708403][ T8410] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.720543][ T8410] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.758120][ T8410] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.768339][ T8410] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.780705][ T8410] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.788925][ T8410] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.842784][ T8410] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.860474][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.875903][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.888597][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.897424][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.918450][ T8410] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.933182][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.943014][ T2939] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.950842][ T2939] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.965319][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.975209][ T8632] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.982827][ T8632] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.006460][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.016545][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.032732][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.048696][ T8410] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 76.061953][ T8410] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 76.076110][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.088732][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.099471][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.118674][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.127991][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.143815][ T8410] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.165022][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.188219][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.198290][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.207719][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.219311][ T8410] device veth0_vlan entered promiscuous mode [ 76.233784][ T8410] device veth1_vlan entered promiscuous mode [ 76.260884][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 76.273093][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 76.286311][ T8410] device veth0_macvtap entered promiscuous mode [ 76.299795][ T8410] device veth1_macvtap entered promiscuous mode [ 76.321750][ T8410] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 76.329457][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.343693][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 76.353432][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.364676][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.379699][ T8410] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 76.392650][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.403074][ T8632] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.417024][ T8410] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.435011][ T8410] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.448775][ T8410] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.462717][ T8410] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 76.612284][ T166] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.639238][ T166] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.675442][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 76.690183][ T195] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.710647][ T195] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.719704][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/29 23:01:37 building call list... [ 77.457566][ T195] ------------[ cut here ]------------ [ 77.465018][ T195] hook not found, pf 3 num 0 [ 77.465677][ T195] WARNING: CPU: 1 PID: 195 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 77.484993][ T195] Modules linked in: [ 77.492277][ T195] CPU: 1 PID: 195 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 77.503042][ T195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.515610][ T195] Workqueue: netns cleanup_net [ 77.525307][ T195] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 77.533095][ T195] 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 [ 77.556786][ T195] RSP: 0018:ffffc900017afbc0 EFLAGS: 00010286 [ 77.564830][ T195] RAX: 0000000000000000 RBX: ffff8881475c6700 RCX: 0000000000000000 [ 77.575872][ T195] RDX: ffff888012920000 RSI: ffffffff815c8ba5 RDI: fffff520002f5f6a [ 77.585050][ T195] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 77.595922][ T195] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888014190f20 [ 77.606927][ T195] R13: 0000000000000000 R14: ffff888019492680 R15: 0000000000000001 [ 77.618405][ T195] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 77.633002][ T195] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.639727][ T195] CR2: 00007fd49ba91020 CR3: 000000001a059000 CR4: 00000000001506e0 [ 77.650337][ T195] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.661818][ T195] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.670273][ T195] Call Trace: [ 77.675190][ T195] nf_unregister_net_hooks+0x117/0x160 [ 77.687665][ T195] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.694833][ T195] ? arptable_filter_net_exit+0x20/0x20 [ 77.702834][ T195] cleanup_net+0x451/0xb10 [ 77.707393][ T195] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.714389][ T195] process_one_work+0x98d/0x1600 [ 77.719678][ T195] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.728400][ T195] ? rwlock_bug.part.0+0x90/0x90 [ 77.735246][ T195] ? _raw_spin_lock_irq+0x41/0x50 [ 77.744182][ T195] worker_thread+0x64c/0x1120 [ 77.749224][ T195] ? process_one_work+0x1600/0x1600 [ 77.756936][ T195] kthread+0x3b1/0x4a0 [ 77.765229][ T195] ? __kthread_bind_mask+0xc0/0xc0 [ 77.771834][ T195] ret_from_fork+0x1f/0x30 [ 77.776426][ T195] Kernel panic - not syncing: panic_on_warn set ... [ 77.783374][ T195] CPU: 1 PID: 195 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 77.791925][ T195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.802257][ T195] Workqueue: netns cleanup_net [ 77.807287][ T195] Call Trace: [ 77.810822][ T195] dump_stack+0x141/0x1d7 [ 77.815900][ T195] panic+0x306/0x73d [ 77.819971][ T195] ? __warn_printk+0xf3/0xf3 [ 77.824629][ T195] ? __warn.cold+0x1a/0x44 [ 77.829233][ T195] ? __nf_unregister_net_hook+0x1eb/0x610 [ 77.835311][ T195] __warn.cold+0x35/0x44 [ 77.839670][ T195] ? __nf_unregister_net_hook+0x1eb/0x610 [ 77.845750][ T195] report_bug+0x1bd/0x210 [ 77.850442][ T195] handle_bug+0x3c/0x60 [ 77.854632][ T195] exc_invalid_op+0x14/0x40 [ 77.859424][ T195] asm_exc_invalid_op+0x12/0x20 [ 77.864652][ T195] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 77.871250][ T195] 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 [ 77.892099][ T195] RSP: 0018:ffffc900017afbc0 EFLAGS: 00010286 [ 77.898437][ T195] RAX: 0000000000000000 RBX: ffff8881475c6700 RCX: 0000000000000000 [ 77.906590][ T195] RDX: ffff888012920000 RSI: ffffffff815c8ba5 RDI: fffff520002f5f6a [ 77.917529][ T195] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 77.926111][ T195] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888014190f20 [ 77.934529][ T195] R13: 0000000000000000 R14: ffff888019492680 R15: 0000000000000001 [ 77.942926][ T195] ? wake_up_klogd.part.0+0x8e/0xd0 [ 77.948511][ T195] ? vprintk+0x95/0x260 [ 77.952913][ T195] nf_unregister_net_hooks+0x117/0x160 [ 77.958627][ T195] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.965034][ T195] ? arptable_filter_net_exit+0x20/0x20 [ 77.970616][ T195] cleanup_net+0x451/0xb10 [ 77.975690][ T195] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.981361][ T195] process_one_work+0x98d/0x1600 [ 77.987044][ T195] ? pwq_dec_nr_in_flight+0x320/0x320 [ 77.993580][ T195] ? rwlock_bug.part.0+0x90/0x90 [ 77.998893][ T195] ? _raw_spin_lock_irq+0x41/0x50 [ 78.004656][ T195] worker_thread+0x64c/0x1120 [ 78.009882][ T195] ? process_one_work+0x1600/0x1600 [ 78.015607][ T195] kthread+0x3b1/0x4a0 [ 78.019944][ T195] ? __kthread_bind_mask+0xc0/0xc0 [ 78.025342][ T195] ret_from_fork+0x1f/0x30 [ 78.032045][ T195] Kernel Offset: disabled [ 78.037767][ T195] Rebooting in 86400 seconds..