DUID 00:04:ac:d3:e9:6f:d6:cf:30:00:cb:75:86:98:6a:d5:8e:9b forked to background, child pid 3174 [ 29.460373][ T3175] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.471773][ T3175] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts. 2022/02/16 22:33:11 fuzzer started 2022/02/16 22:33:12 connecting to host at 10.128.0.169:34659 2022/02/16 22:33:12 checking machine... 2022/02/16 22:33:12 checking revisions... 2022/02/16 22:33:12 testing simple program... syzkaller login: [ 50.684826][ T3594] cgroup: Unknown subsys name 'net' [ 50.816845][ T3594] cgroup: Unknown subsys name 'rlimit' [ 52.019961][ T3600] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 52.028375][ T3600] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 52.036955][ T3600] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 52.045593][ T3600] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 52.054079][ T3600] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 52.062534][ T3600] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 52.153805][ T3596] chnl_net:caif_netlink_parms(): no params data found [ 52.198867][ T3596] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.206491][ T3596] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.214634][ T3596] device bridge_slave_0 entered promiscuous mode [ 52.224627][ T3596] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.232133][ T3596] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.240254][ T3596] device bridge_slave_1 entered promiscuous mode [ 52.262059][ T3596] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 52.273335][ T3596] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 52.297583][ T3596] team0: Port device team_slave_0 added [ 52.305482][ T3596] team0: Port device team_slave_1 added [ 52.324081][ T3596] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 52.331774][ T3596] 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. [ 52.358053][ T3596] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 52.372185][ T3596] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 52.379158][ T3596] 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. [ 52.405373][ T3596] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 52.431156][ T3596] [ 52.433625][ T3596] ============================= [ 52.438478][ T3596] WARNING: suspicious RCU usage [ 52.443382][ T3596] 5.17.0-rc2-syzkaller-00969-g477bb4c1baa7 #0 Not tainted [ 52.450555][ T3596] ----------------------------- [ 52.455401][ T3596] net/hsr/hsr_framereg.c:34 suspicious rcu_dereference_check() usage! [ 52.463615][ T3596] [ 52.463615][ T3596] other info that might help us debug this: [ 52.463615][ T3596] [ 52.473894][ T3596] [ 52.473894][ T3596] rcu_scheduler_active = 2, debug_locks = 1 [ 52.482211][ T3596] 2 locks held by syz-executor.0/3596: [ 52.487686][ T3596] #0: ffffffff8d32caa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 [ 52.497150][ T3596] #1: ffff888076c815f0 (&hsr->list_lock){+...}-{2:2}, at: hsr_create_self_node+0x225/0x650 [ 52.507328][ T3596] [ 52.507328][ T3596] stack backtrace: [ 52.513270][ T3596] CPU: 1 PID: 3596 Comm: syz-executor.0 Not tainted 5.17.0-rc2-syzkaller-00969-g477bb4c1baa7 #0 [ 52.523693][ T3596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.533749][ T3596] Call Trace: [ 52.537023][ T3596] [ 52.539949][ T3596] dump_stack_lvl+0xcd/0x134 [ 52.544555][ T3596] hsr_node_get_first+0x9b/0xb0 [ 52.549425][ T3596] hsr_create_self_node+0x22d/0x650 [ 52.554635][ T3596] hsr_dev_finalize+0x2c1/0x7d0 [ 52.559498][ T3596] hsr_newlink+0x315/0x730 [ 52.563915][ T3596] ? hsr_dellink+0x130/0x130 [ 52.568514][ T3596] ? rtnl_create_link+0x7e8/0xc00 [ 52.573542][ T3596] ? hsr_dellink+0x130/0x130 [ 52.578136][ T3596] __rtnl_newlink+0x107c/0x1760 [ 52.583001][ T3596] ? rtnl_setlink+0x3c0/0x3c0 [ 52.588042][ T3596] ? is_bpf_text_address+0x77/0x170 [ 52.593256][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 52.598122][ T3596] ? unwind_next_frame+0xee1/0x1ce0 [ 52.603324][ T3596] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 52.609498][ T3596] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 52.615339][ T3596] ? is_bpf_text_address+0x99/0x170 [ 52.620570][ T3596] ? kernel_text_address+0x39/0x80 [ 52.625688][ T3596] ? __kernel_text_address+0x9/0x30 [ 52.630893][ T3596] ? unwind_get_return_address+0x51/0x90 [ 52.636546][ T3596] ? create_prof_cpu_mask+0x20/0x20 [ 52.641762][ T3596] ? arch_stack_walk+0x93/0xe0 [ 52.646592][ T3596] ? kmem_cache_alloc_trace+0x42/0x2c0 [ 52.652119][ T3596] ? rcu_read_lock_sched_held+0x3a/0x70 [ 52.657702][ T3596] rtnl_newlink+0x64/0xa0 [ 52.662034][ T3596] ? __rtnl_newlink+0x1760/0x1760 [ 52.667094][ T3596] rtnetlink_rcv_msg+0x413/0xb80 [ 52.672039][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 52.676659][ T3596] netlink_rcv_skb+0x153/0x420 [ 52.681428][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 52.685952][ T3596] ? netlink_ack+0xa60/0xa60 [ 52.690540][ T3596] ? netlink_deliver_tap+0x1a2/0xc40 [ 52.695831][ T3596] ? netlink_deliver_tap+0x1b1/0xc40 [ 52.701126][ T3596] netlink_unicast+0x539/0x7e0 [ 52.705931][ T3596] ? netlink_attachskb+0x880/0x880 [ 52.711057][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 52.717508][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 52.723855][ T3596] ? __phys_addr_symbol+0x2c/0x70 [ 52.728888][ T3596] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 52.734633][ T3596] ? __check_object_size+0x16e/0x310 [ 52.739928][ T3596] netlink_sendmsg+0x904/0xe00 [ 52.744706][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 52.749666][ T3596] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 52.755940][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 52.760904][ T3596] sock_sendmsg+0xcf/0x120 [ 52.765340][ T3596] __sys_sendto+0x21c/0x320 [ 52.769938][ T3596] ? __ia32_sys_getpeername+0xb0/0xb0 [ 52.775326][ T3596] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 52.781345][ T3596] ? __context_tracking_exit+0xb8/0xe0 [ 52.786923][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 52.791779][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 52.796649][ T3596] __x64_sys_sendto+0xdd/0x1b0 [ 52.801414][ T3596] ? lockdep_hardirqs_on+0x79/0x100 [ 52.806616][ T3596] ? syscall_enter_from_user_mode+0x21/0x70 [ 52.812515][ T3596] do_syscall_64+0x35/0xb0 [ 52.816934][ T3596] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 52.822829][ T3596] RIP: 0033:0x7f6fe8e5ee1c [ 52.827261][ T3596] Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b [ 52.846867][ T3596] RSP: 002b:00007ffd1f3f5d50 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 52.855299][ T3596] RAX: ffffffffffffffda RBX: 00007f6fe9ef7320 RCX: 00007f6fe8e5ee1c [ 52.863268][ T3596] RDX: 0000000000000048 RSI: 00007f6fe9ef7370 RDI: 0000000000000003 [ 52.871237][ T3596] RBP: 0000000000000000 R08: 00007ffd1f3f5da4 R09: 000000000000000c [ 52.879218][ T3596] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 52.887207][ T3596] R13: 00007f6fe9ef7370 R14: 0000000000000003 R15: 0000000000000000 [ 52.895295][ T3596] [ 52.905614][ T3596] device hsr_slave_0 entered promiscuous mode [ 52.912336][ T3596] device hsr_slave_1 entered promiscuous mode [ 52.994529][ T3596] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 53.005219][ T3596] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 53.014636][ T3596] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 53.024243][ T3596] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 53.044763][ T3596] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.052031][ T3596] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.059937][ T3596] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.067019][ T3596] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.109422][ T3596] 8021q: adding VLAN 0 to HW filter on device bond0 [ 53.125135][ T918] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.137122][ T918] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.145642][ T918] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.155204][ T918] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 53.168388][ T3596] 8021q: adding VLAN 0 to HW filter on device team0 [ 53.179129][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 53.187800][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 53.197165][ T6] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.204289][ T6] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.224369][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 53.233027][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 53.242051][ T3607] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.249158][ T3607] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.257249][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 53.266024][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 53.277619][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 53.286933][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 53.296714][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 53.307943][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 53.316896][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 53.327681][ T3606] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 53.336844][ T3606] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 53.348875][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 53.357912][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 53.368322][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 53.385751][ T3606] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 53.394019][ T3606] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 53.406528][ T3596] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program [ 53.522252][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 53.531453][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 53.541434][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 53.549660][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 53.559422][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 53.567330][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 53.576712][ T3596] device veth0_vlan entered promiscuous mode [ 53.588802][ T3596] device veth1_vlan entered promiscuous mode [ 53.607260][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 53.615373][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 53.624154][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 53.633349][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 53.644932][ T3596] device veth0_macvtap entered promiscuous mode [ 53.654578][ T3596] device veth1_macvtap entered promiscuous mode [ 53.669396][ T3596] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 53.677941][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 53.686608][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 53.695441][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 53.704718][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 53.716487][ T3596] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 53.724248][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 53.733889][ T2104] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 53.746007][ T3596] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.755078][ T3596] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.763919][ T3596] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.773133][ T3596] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.834135][ T11] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 53.847356][ T11] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 53.863617][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 53.873672][ T11] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 53.882299][ T11] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 53.892662][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2022/02/16 22:33:15 building call list... [ 54.124506][ T9] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 56.167089][ T3590] can: request_module (can-proto-0) failed. [ 56.191335][ T3590] can: request_module (can-proto-0) failed. [ 56.212563][ T3590] can: request_module (can-proto-0) failed. executing program [ 56.591822][ T3596] syz-executor.0 (3596) used greatest stack depth: 22480 bytes left [ 56.730410][ T9] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0