[ 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 '10.128.1.121' (ECDSA) to the list of known hosts. 2021/05/05 00:43:52 fuzzer started 2021/05/05 00:43:52 connecting to host at 10.128.0.169:45585 2021/05/05 00:43:52 checking machine... 2021/05/05 00:43:52 checking revisions... 2021/05/05 00:43:52 testing simple program... syzkaller login: [ 74.033953][ T8405] chnl_net:caif_netlink_parms(): no params data found [ 74.090184][ T8405] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.097871][ T8405] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.107332][ T8405] device bridge_slave_0 entered promiscuous mode [ 74.116955][ T8405] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.125082][ T8405] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.133396][ T8405] device bridge_slave_1 entered promiscuous mode [ 74.156581][ T8405] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.168316][ T8405] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.197482][ T8405] team0: Port device team_slave_0 added [ 74.206390][ T8405] team0: Port device team_slave_1 added [ 74.228712][ T8405] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.236061][ T8405] 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. [ 74.263033][ T8405] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.276354][ T8405] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.285141][ T8405] 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. [ 74.312035][ T8405] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.338668][ T8405] device hsr_slave_0 entered promiscuous mode [ 74.345441][ T8405] device hsr_slave_1 entered promiscuous mode [ 74.461274][ T8405] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.475405][ T8405] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.485642][ T8405] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.496930][ T8405] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 74.525729][ T8405] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.533170][ T8405] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.541701][ T8405] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.548813][ T8405] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.597994][ T8405] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.612712][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.625139][ T8626] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.634965][ T8626] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.644519][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.657818][ T8405] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.669739][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.678964][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.686230][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.702007][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.710860][ T8626] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.717907][ T8626] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.742438][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.751379][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.760568][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.769697][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.784943][ T8627] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.795618][ T8405] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.818836][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.827234][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.842846][ T8405] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.864039][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.885954][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.894444][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.902439][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.915562][ T8405] device veth0_vlan entered promiscuous mode [ 74.928625][ T8405] device veth1_vlan entered promiscuous mode [ 74.953055][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.961878][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.970944][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.982800][ T8405] device veth0_macvtap entered promiscuous mode [ 74.995782][ T8405] device veth1_macvtap entered promiscuous mode [ 75.012679][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 75.024764][ T8405] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.033539][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.043650][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.057316][ T8405] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.065174][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.075213][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.086637][ T8405] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.096348][ T8405] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.105488][ T8405] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.114708][ T8405] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.227952][ T90] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.241424][ T90] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.274269][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.299574][ T90] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.309220][ T90] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.319091][ T8626] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/05 00:43:55 building call list... [ 75.972764][ T90] ------------[ cut here ]------------ [ 75.978596][ T90] hook not found, pf 3 num 0 [ 75.979288][ T90] WARNING: CPU: 1 PID: 90 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 76.000895][ T90] Modules linked in: [ 76.004922][ T90] CPU: 1 PID: 90 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 76.017213][ T90] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.029533][ T90] Workqueue: netns cleanup_net [ 76.034456][ T90] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.043908][ T90] 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 d8 6d 8a e8 40 4d 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 19 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.064749][ T90] RSP: 0018:ffffc9000112fbc0 EFLAGS: 00010286 [ 76.073655][ T90] RAX: 0000000000000000 RBX: ffff888149905c00 RCX: 0000000000000000 [ 76.083068][ T90] RDX: ffff888014371c40 RSI: ffffffff815c8ba5 RDI: fffff52000225f6a [ 76.093074][ T90] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.102292][ T90] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888031298f20 [ 76.111362][ T90] R13: 0000000000000000 R14: ffff8880247e2b00 R15: 0000000000000001 [ 76.120824][ T90] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 76.132380][ T90] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.139199][ T90] CR2: 00007fcfd9d3b008 CR3: 000000001c4cf000 CR4: 00000000001506e0 [ 76.149742][ T90] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.157808][ T90] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.165907][ T90] Call Trace: [ 76.169217][ T90] nf_unregister_net_hooks+0x117/0x160 [ 76.178356][ T90] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.184550][ T90] ? arptable_filter_net_exit+0x20/0x20 [ 76.190692][ T90] cleanup_net+0x451/0xb10 [ 76.195174][ T90] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.202109][ T90] process_one_work+0x98d/0x1600 [ 76.207188][ T90] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.213387][ T90] ? rwlock_bug.part.0+0x90/0x90 [ 76.218760][ T90] ? _raw_spin_lock_irq+0x41/0x50 [ 76.224030][ T90] worker_thread+0x64c/0x1120 [ 76.228858][ T90] ? process_one_work+0x1600/0x1600 [ 76.234735][ T90] kthread+0x3b1/0x4a0 [ 76.238973][ T90] ? __kthread_bind_mask+0xc0/0xc0 [ 76.244308][ T90] ret_from_fork+0x1f/0x30 [ 76.248971][ T90] Kernel panic - not syncing: panic_on_warn set ... [ 76.255572][ T90] CPU: 0 PID: 90 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 76.263564][ T90] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.273721][ T90] Workqueue: netns cleanup_net [ 76.278505][ T90] Call Trace: [ 76.281791][ T90] dump_stack+0x141/0x1d7 [ 76.286142][ T90] panic+0x306/0x73d [ 76.290053][ T90] ? __warn_printk+0xf3/0xf3 [ 76.294666][ T90] ? __warn.cold+0x1a/0x44 [ 76.299096][ T90] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.304831][ T90] __warn.cold+0x35/0x44 [ 76.309085][ T90] ? __nf_unregister_net_hook+0x1eb/0x610 [ 76.314820][ T90] report_bug+0x1bd/0x210 [ 76.319174][ T90] handle_bug+0x3c/0x60 [ 76.323347][ T90] exc_invalid_op+0x14/0x40 [ 76.327865][ T90] asm_exc_invalid_op+0x12/0x20 [ 76.332731][ T90] RIP: 0010:__nf_unregister_net_hook+0x1eb/0x610 [ 76.339078][ T90] 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 d8 6d 8a e8 40 4d 8a 01 <0f> 0b e9 e5 00 00 00 e8 59 19 2e fa 44 8b 3c 24 4c 89 f8 48 c1 e0 [ 76.358698][ T90] RSP: 0018:ffffc9000112fbc0 EFLAGS: 00010286 [ 76.364777][ T90] RAX: 0000000000000000 RBX: ffff888149905c00 RCX: 0000000000000000 [ 76.372848][ T90] RDX: ffff888014371c40 RSI: ffffffff815c8ba5 RDI: fffff52000225f6a [ 76.380842][ T90] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 76.388841][ T90] R10: ffffffff815c2a0e R11: 0000000000000000 R12: ffff888031298f20 [ 76.396917][ T90] R13: 0000000000000000 R14: ffff8880247e2b00 R15: 0000000000000001 [ 76.404920][ T90] ? wake_up_klogd.part.0+0x8e/0xd0 [ 76.410141][ T90] ? vprintk+0x95/0x260 [ 76.414326][ T90] nf_unregister_net_hooks+0x117/0x160 [ 76.419809][ T90] arpt_unregister_table_pre_exit+0x67/0x80 [ 76.425730][ T90] ? arptable_filter_net_exit+0x20/0x20 [ 76.431411][ T90] cleanup_net+0x451/0xb10 [ 76.435848][ T90] ? ops_free_list.part.0+0x3d0/0x3d0 [ 76.441264][ T90] process_one_work+0x98d/0x1600 [ 76.446258][ T90] ? pwq_dec_nr_in_flight+0x320/0x320 [ 76.451673][ T90] ? rwlock_bug.part.0+0x90/0x90 [ 76.456653][ T90] ? _raw_spin_lock_irq+0x41/0x50 [ 76.461705][ T90] worker_thread+0x64c/0x1120 [ 76.466413][ T90] ? process_one_work+0x1600/0x1600 [ 76.471632][ T90] kthread+0x3b1/0x4a0 [ 76.476234][ T90] ? __kthread_bind_mask+0xc0/0xc0 [ 76.481794][ T90] ret_from_fork+0x1f/0x30 [ 76.487603][ T90] Kernel Offset: disabled [ 76.492158][ T90] Rebooting in 86400 seconds..