[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.5' (ECDSA) to the list of known hosts. 2021/05/04 00:30:15 fuzzer started 2021/05/04 00:30:15 connecting to host at 10.128.0.169:39029 2021/05/04 00:30:15 checking machine... 2021/05/04 00:30:15 checking revisions... 2021/05/04 00:30:15 testing simple program... syzkaller login: [ 75.638023][ T8429] chnl_net:caif_netlink_parms(): no params data found [ 75.726526][ T8429] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.736162][ T8429] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.747266][ T8429] device bridge_slave_0 entered promiscuous mode [ 75.758200][ T8429] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.766885][ T8429] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.775998][ T8429] device bridge_slave_1 entered promiscuous mode [ 75.798363][ T8429] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.812766][ T8429] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 75.836682][ T8429] team0: Port device team_slave_0 added [ 75.844543][ T8429] team0: Port device team_slave_1 added [ 75.863080][ T8429] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 75.871451][ T8429] 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. [ 75.899943][ T8429] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 75.913583][ T8429] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 75.922628][ T8429] 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. [ 75.951967][ T8429] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 75.981354][ T8429] device hsr_slave_0 entered promiscuous mode [ 75.989626][ T8429] device hsr_slave_1 entered promiscuous mode [ 76.095040][ T8429] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.106850][ T8429] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.117600][ T8429] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.129236][ T8429] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.154017][ T8429] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.161737][ T8429] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.170547][ T8429] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.178280][ T8429] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.230091][ T8429] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.245372][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.257357][ T37] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.268073][ T37] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.277384][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.292062][ T8429] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.304855][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.315201][ T37] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.323054][ T37] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.349860][ T4849] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.358819][ T4849] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.366440][ T4849] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.375785][ T4849] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.386082][ T4849] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.403282][ T8429] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 76.415286][ T8429] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 76.431088][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.439506][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.449486][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.465408][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.486674][ T8429] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.496518][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.505568][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 76.529816][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 76.552245][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 76.562368][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 76.570573][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 76.585025][ T8429] device veth0_vlan entered promiscuous mode [ 76.598805][ T8429] device veth1_vlan entered promiscuous mode [ 76.613314][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 76.622339][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 76.644471][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 76.655358][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 76.666930][ T8429] device veth0_macvtap entered promiscuous mode [ 76.681767][ T8429] device veth1_macvtap entered promiscuous mode [ 76.701273][ T8429] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 76.709932][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.720286][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 76.728689][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.739462][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.754626][ T8429] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 76.763744][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.773607][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.788114][ T8429] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.798251][ T8429] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.810744][ T8429] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 76.820976][ T8429] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 76.913139][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.927020][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 76.953226][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 76.976638][ T208] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 76.997934][ T208] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 77.013668][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/05/04 00:30:18 building call list... [ 77.721510][ T208] ------------[ cut here ]------------ [ 77.732670][ T208] hook not found, pf 3 num 0 [ 77.733562][ T208] WARNING: CPU: 1 PID: 208 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 77.753336][ T208] Modules linked in: [ 77.757570][ T208] CPU: 1 PID: 208 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 77.769144][ T208] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.784577][ T208] Workqueue: netns cleanup_net [ 77.792255][ T208] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 77.801857][ T208] 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 50 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 77.827355][ T208] RSP: 0018:ffffc9000130fbc0 EFLAGS: 00010286 [ 77.847345][ T208] RAX: 0000000000000000 RBX: ffff888147635a00 RCX: 0000000000000000 [ 77.859644][ T208] RDX: ffff88801295b880 RSI: ffffffff815c8ba5 RDI: fffff52000261f6a [ 77.868347][ T208] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 77.882992][ T208] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888036958f20 [ 77.893590][ T208] R13: 0000000000000000 R14: ffff888023162500 R15: 0000000000000001 [ 77.905064][ T208] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 77.916362][ T208] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.926705][ T208] CR2: 00007f2279621000 CR3: 0000000013aec000 CR4: 00000000001506e0 [ 77.936358][ T208] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.947319][ T208] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.958404][ T208] Call Trace: [ 77.964390][ T208] nf_unregister_net_hooks+0x117/0x160 [ 77.971061][ T208] arpt_unregister_table_pre_exit+0x67/0x80 [ 77.977534][ T208] ? arptable_filter_net_exit+0x20/0x20 [ 77.986407][ T208] cleanup_net+0x451/0xb10 [ 77.992398][ T208] ? ops_free_list.part.0+0x3d0/0x3d0 [ 77.999880][ T208] process_one_work+0x98d/0x1600 [ 78.005063][ T208] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.014359][ T208] ? rwlock_bug.part.0+0x90/0x90 [ 78.021132][ T208] ? _raw_spin_lock_irq+0x41/0x50 [ 78.026533][ T208] worker_thread+0x64c/0x1120 [ 78.036479][ T208] ? process_one_work+0x1600/0x1600 [ 78.043048][ T208] kthread+0x3b1/0x4a0 [ 78.047255][ T208] ? __kthread_bind_mask+0xc0/0xc0 [ 78.056107][ T208] ret_from_fork+0x1f/0x30 [ 78.061520][ T208] Kernel panic - not syncing: panic_on_warn set ... [ 78.068400][ T208] CPU: 1 PID: 208 Comm: kworker/u4:4 Not tainted 5.12.0-syzkaller #0 [ 78.076572][ T208] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.086859][ T208] Workqueue: netns cleanup_net [ 78.091730][ T208] Call Trace: [ 78.095364][ T208] dump_stack+0x141/0x1d7 [ 78.100148][ T208] panic+0x306/0x73d [ 78.104248][ T208] ? __warn_printk+0xf3/0xf3 [ 78.108961][ T208] ? __warn.cold+0x1a/0x44 [ 78.114236][ T208] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.120544][ T208] __warn.cold+0x35/0x44 [ 78.125065][ T208] ? __nf_unregister_net_hook+0x1eb/0x610 [ 78.130974][ T208] report_bug+0x1bd/0x210 [ 78.136031][ T208] handle_bug+0x3c/0x60 [ 78.140454][ T208] exc_invalid_op+0x14/0x40 [ 78.145080][ T208] asm_exc_invalid_op+0x12/0x20 [ 78.150635][ T208] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 78.157148][ T208] 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 50 4c 8a 01 <0f> 0b e9 e5 00 00 00 e8 69 48 30 fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 78.178051][ T208] RSP: 0018:ffffc9000130fbc0 EFLAGS: 00010286 [ 78.184561][ T208] RAX: 0000000000000000 RBX: ffff888147635a00 RCX: 0000000000000000 [ 78.193868][ T208] RDX: ffff88801295b880 RSI: ffffffff815c8ba5 RDI: fffff52000261f6a [ 78.202410][ T208] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 78.210381][ T208] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888036958f20 [ 78.218734][ T208] R13: 0000000000000000 R14: ffff888023162500 R15: 0000000000000001 [ 78.226981][ T208] ? wake_up_klogd.part.0+0x8e/0xd0 [ 78.232454][ T208] ? vprintk+0x95/0x260 [ 78.236711][ T208] nf_unregister_net_hooks+0x117/0x160 [ 78.242277][ T208] arpt_unregister_table_pre_exit+0x67/0x80 [ 78.248318][ T208] ? arptable_filter_net_exit+0x20/0x20 [ 78.254684][ T208] cleanup_net+0x451/0xb10 [ 78.259216][ T208] ? ops_free_list.part.0+0x3d0/0x3d0 [ 78.264714][ T208] process_one_work+0x98d/0x1600 [ 78.269781][ T208] ? pwq_dec_nr_in_flight+0x320/0x320 [ 78.275164][ T208] ? rwlock_bug.part.0+0x90/0x90 [ 78.280381][ T208] ? _raw_spin_lock_irq+0x41/0x50 [ 78.285746][ T208] worker_thread+0x64c/0x1120 [ 78.290624][ T208] ? process_one_work+0x1600/0x1600 [ 78.296001][ T208] kthread+0x3b1/0x4a0 [ 78.300245][ T208] ? __kthread_bind_mask+0xc0/0xc0 [ 78.306327][ T208] ret_from_fork+0x1f/0x30 [ 78.312281][ T208] Kernel Offset: disabled [ 78.317173][ T208] Rebooting in 86400 seconds..