[ 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... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.206' (ECDSA) to the list of known hosts. 2021/04/28 21:02:27 fuzzer started 2021/04/28 21:02:27 connecting to host at 10.128.0.169:41393 2021/04/28 21:02:27 checking machine... 2021/04/28 21:02:27 checking revisions... 2021/04/28 21:02:27 testing simple program... syzkaller login: [ 76.021463][ T8398] chnl_net:caif_netlink_parms(): no params data found [ 76.077646][ T8398] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.086928][ T8398] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.098874][ T8398] device bridge_slave_0 entered promiscuous mode [ 76.113684][ T8398] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.123619][ T8398] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.134034][ T8398] device bridge_slave_1 entered promiscuous mode [ 76.156625][ T8398] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.168798][ T8398] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.191616][ T8398] team0: Port device team_slave_0 added [ 76.199537][ T8398] team0: Port device team_slave_1 added [ 76.219022][ T8398] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.231394][ T8398] 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. [ 76.262246][ T8398] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.277048][ T8398] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.285729][ T8398] 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. [ 76.316675][ T8398] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 76.345764][ T8398] device hsr_slave_0 entered promiscuous mode [ 76.354935][ T8398] device hsr_slave_1 entered promiscuous mode [ 76.468477][ T8398] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.488085][ T8398] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.500260][ T8398] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.512136][ T8398] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.544083][ T8398] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.555914][ T8398] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.566406][ T8398] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.577243][ T8398] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.630996][ T8398] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.649782][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.662662][ T8] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.676411][ T8] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.686473][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.701888][ T8398] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.716288][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.728711][ T8] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.737491][ T8] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.752196][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.765091][ T36] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.776502][ T36] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.798790][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.823689][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.834293][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.844375][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.854633][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.866953][ T8398] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.890239][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.898857][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.917333][ T8398] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.940266][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.962796][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.972118][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.985586][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.999601][ T8398] device veth0_vlan entered promiscuous mode [ 77.014343][ T8398] device veth1_vlan entered promiscuous mode [ 77.039599][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 77.049278][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.064256][ T8398] device veth0_macvtap entered promiscuous mode [ 77.076851][ T8398] device veth1_macvtap entered promiscuous mode [ 77.095779][ T8398] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.105985][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 77.116555][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 77.126195][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.136936][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.150813][ T8398] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.161533][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.171481][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.185913][ T8398] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.196400][ T8398] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.205812][ T8398] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.215744][ T8398] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.321846][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.335110][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 77.366769][ T20] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 77.385148][ T9] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 77.397519][ T9] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.409489][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/04/28 21:02:30 building call list... [ 78.059781][ T25] ------------[ cut here ]------------ [ 78.070512][ T25] hook not found, pf 3 num 0 [ 78.071163][ T25] WARNING: CPU: 0 PID: 25 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 78.092912][ T25] Modules linked in: [ 78.097616][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-rc7-syzkaller #0 [ 78.109026][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.121290][ T25] Workqueue: netns cleanup_net [ 78.128142][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.145804][ 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 00 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.173695][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 78.180351][ T25] RAX: 0000000000000000 RBX: ffff888147458700 RCX: 0000000000000000 [ 78.190194][ T25] RDX: ffff88801172b880 RSI: ffffffff815c5205 RDI: fffff520001bff6a [ 78.200505][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.209920][ T25] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888029b80f20 [ 78.219576][ T25] R13: 0000000000000000 R14: ffff8880123a7e80 R15: 0000000000000001 [ 78.228518][ T25] FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 78.249756][ T25] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.257931][ T25] CR2: 00007eff1ce23740 CR3: 0000000026071000 CR4: 00000000001506f0 [ 78.268130][ T25] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.277719][ T25] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.286803][ T25] Call Trace: [ 78.290491][ T25] nf_unregister_net_hooks+0x117/0x160 [ 78.297916][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.305969][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 78.316057][ T25] cleanup_net+0x451/0xb10 [ 78.321288][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.328088][ T25] process_one_work+0x98d/0x1600 [ 78.333747][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.339256][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 78.345641][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 78.351038][ T25] worker_thread+0x64c/0x1120 [ 78.356344][ T25] ? process_one_work+0x1600/0x1600 [ 78.361726][ T25] kthread+0x3b1/0x4a0 [ 78.367276][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 78.373421][ T25] ret_from_fork+0x1f/0x30 [ 78.379416][ T25] Kernel panic - not syncing: panic_on_warn set ... [ 78.386583][ T25] CPU: 0 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-rc7-syzkaller #0 [ 78.397902][ T25] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.409547][ T25] Workqueue: netns cleanup_net [ 78.415206][ T25] Call Trace: [ 78.419300][ T25] dump_stack+0x141/0x1d7 [ 78.423833][ T25] panic+0x306/0x73d [ 78.428124][ T25] ? __warn_printk+0xf3/0xf3 [ 78.433015][ T25] ? __warn.cold+0x1a/0x44 [ 78.438169][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.445119][ T25] __warn.cold+0x35/0x44 [ 78.449577][ T25] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.456302][ T25] report_bug+0x1bd/0x210 [ 78.461084][ T25] handle_bug+0x3c/0x60 [ 78.466843][ T25] exc_invalid_op+0x14/0x40 [ 78.472164][ T25] asm_exc_invalid_op+0x12/0x20 [ 78.477847][ T25] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.484626][ 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 00 6c 6c 8a e8 8e 38 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 36 35 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.506315][ T25] RSP: 0018:ffffc90000dffbc0 EFLAGS: 00010286 [ 78.512926][ T25] RAX: 0000000000000000 RBX: ffff888147458700 RCX: 0000000000000000 [ 78.521309][ T25] RDX: ffff88801172b880 RSI: ffffffff815c5205 RDI: fffff520001bff6a [ 78.529930][ T25] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.539174][ T25] R10: ffffffff815bdf9e R11: 0000000000000000 R12: ffff888029b80f20 [ 78.548131][ T25] R13: 0000000000000000 R14: ffff8880123a7e80 R15: 0000000000000001 [ 78.557113][ T25] ? wake_up_klogd.part.0+0x8e/0xd0 [ 78.562745][ T25] ? vprintk_func+0x95/0x1e0 [ 78.567430][ T25] nf_unregister_net_hooks+0x117/0x160 [ 78.573400][ T25] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.580890][ T25] ? arptable_filter_net_exit+0x20/0x20 [ 78.587095][ T25] cleanup_net+0x451/0xb10 [ 78.592317][ T25] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.598949][ T25] process_one_work+0x98d/0x1600 [ 78.606011][ T25] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.613236][ T25] ? rwlock_bug.part.0+0x90/0x90 [ 78.619997][ T25] ? _raw_spin_lock_irq+0x41/0x50 [ 78.626192][ T25] worker_thread+0x64c/0x1120 [ 78.633165][ T25] ? process_one_work+0x1600/0x1600 [ 78.641578][ T25] kthread+0x3b1/0x4a0 [ 78.647457][ T25] ? __kthread_bind_mask+0xc0/0xc0 [ 78.654021][ T25] ret_from_fork+0x1f/0x30 [ 78.661590][ T25] Kernel Offset: disabled [ 78.667823][ T25] Rebooting in 86400 seconds..