DUID 00:04:ac:d3:e9:6f:d6:cf:30:00:cb:75:86:98:6a:d5:8e:9b forked to background, child pid 3173 [ 29.665906][ T3174] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.681756][ T3174] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.242' (ECDSA) to the list of known hosts. 2022/02/15 17:17:11 fuzzer started 2022/02/15 17:17:11 connecting to host at 10.128.0.169:42199 2022/02/15 17:17:11 checking machine... 2022/02/15 17:17:11 checking revisions... 2022/02/15 17:17:12 testing simple program... syzkaller login: [ 51.213938][ T3595] cgroup: Unknown subsys name 'net' [ 51.344293][ T3595] cgroup: Unknown subsys name 'rlimit' [ 52.528189][ T3598] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 52.536778][ T3598] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 52.544528][ T3601] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 52.552124][ T3601] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 52.559947][ T3601] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 52.567581][ T3601] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 52.659274][ T3597] chnl_net:caif_netlink_parms(): no params data found [ 52.703666][ T3597] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.711492][ T3597] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.719660][ T3597] device bridge_slave_0 entered promiscuous mode [ 52.729377][ T3597] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.736683][ T3597] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.744912][ T3597] device bridge_slave_1 entered promiscuous mode [ 52.765632][ T3597] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 52.777401][ T3597] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 52.801207][ T3597] team0: Port device team_slave_0 added [ 52.809273][ T3597] team0: Port device team_slave_1 added [ 52.828024][ T3597] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 52.835223][ T3597] 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. [ 52.861551][ T3597] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 52.874504][ T3597] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 52.881539][ T3597] 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. [ 52.908167][ T3597] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 52.932507][ T3597] [ 52.934989][ T3597] ============================= [ 52.939894][ T3597] WARNING: suspicious RCU usage [ 52.944748][ T3597] 5.17.0-rc2-syzkaller-00956-gedc21dc909c6 #0 Not tainted [ 52.951913][ T3597] ----------------------------- [ 52.956848][ T3597] net/hsr/hsr_framereg.c:34 suspicious rcu_dereference_check() usage! [ 52.965139][ T3597] [ 52.965139][ T3597] other info that might help us debug this: [ 52.965139][ T3597] [ 52.975517][ T3597] [ 52.975517][ T3597] rcu_scheduler_active = 2, debug_locks = 1 [ 52.984011][ T3597] 2 locks held by syz-executor.0/3597: [ 52.989527][ T3597] #0: ffffffff8d32caa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 [ 52.999093][ T3597] #1: ffff8880742495f0 (&hsr->list_lock){+...}-{2:2}, at: hsr_create_self_node+0x225/0x650 [ 53.009270][ T3597] [ 53.009270][ T3597] stack backtrace: [ 53.015191][ T3597] CPU: 0 PID: 3597 Comm: syz-executor.0 Not tainted 5.17.0-rc2-syzkaller-00956-gedc21dc909c6 #0 [ 53.025688][ T3597] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.035753][ T3597] Call Trace: [ 53.039027][ T3597] [ 53.041999][ T3597] dump_stack_lvl+0xcd/0x134 [ 53.046684][ T3597] hsr_node_get_first+0x9b/0xb0 [ 53.051546][ T3597] hsr_create_self_node+0x22d/0x650 [ 53.056769][ T3597] hsr_dev_finalize+0x2c1/0x7d0 [ 53.061621][ T3597] hsr_newlink+0x315/0x730 [ 53.066046][ T3597] ? hsr_dellink+0x130/0x130 [ 53.070726][ T3597] ? rtnl_create_link+0x7e8/0xc00 [ 53.075758][ T3597] ? hsr_dellink+0x130/0x130 [ 53.080351][ T3597] __rtnl_newlink+0x107c/0x1760 [ 53.085473][ T3597] ? rtnl_setlink+0x3c0/0x3c0 [ 53.090156][ T3597] ? is_bpf_text_address+0x77/0x170 [ 53.095363][ T3597] ? lock_downgrade+0x6e0/0x6e0 [ 53.100232][ T3597] ? unwind_next_frame+0xee1/0x1ce0 [ 53.105435][ T3597] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 53.111496][ T3597] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 53.117217][ T3597] ? is_bpf_text_address+0x99/0x170 [ 53.122417][ T3597] ? kernel_text_address+0x39/0x80 [ 53.127722][ T3597] ? __kernel_text_address+0x9/0x30 [ 53.133056][ T3597] ? unwind_get_return_address+0x51/0x90 [ 53.138688][ T3597] ? create_prof_cpu_mask+0x20/0x20 [ 53.143914][ T3597] ? arch_stack_walk+0x93/0xe0 [ 53.148735][ T3597] ? kmem_cache_alloc_trace+0x42/0x2c0 [ 53.154286][ T3597] ? rcu_read_lock_sched_held+0x3a/0x70 [ 53.159838][ T3597] rtnl_newlink+0x64/0xa0 [ 53.164165][ T3597] ? __rtnl_newlink+0x1760/0x1760 [ 53.169206][ T3597] rtnetlink_rcv_msg+0x413/0xb80 [ 53.174136][ T3597] ? rtnl_newlink+0xa0/0xa0 [ 53.178636][ T3597] netlink_rcv_skb+0x153/0x420 [ 53.183394][ T3597] ? rtnl_newlink+0xa0/0xa0 [ 53.187896][ T3597] ? netlink_ack+0xa60/0xa60 [ 53.192479][ T3597] ? netlink_deliver_tap+0x1a2/0xc40 [ 53.197756][ T3597] ? netlink_deliver_tap+0x1b1/0xc40 [ 53.203206][ T3597] netlink_unicast+0x539/0x7e0 [ 53.208041][ T3597] ? netlink_attachskb+0x880/0x880 [ 53.213234][ T3597] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 53.219475][ T3597] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 53.225858][ T3597] ? __phys_addr_symbol+0x2c/0x70 [ 53.230880][ T3597] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 53.236596][ T3597] ? __check_object_size+0x16e/0x310 [ 53.241878][ T3597] netlink_sendmsg+0x904/0xe00 [ 53.246659][ T3597] ? netlink_unicast+0x7e0/0x7e0 [ 53.251740][ T3597] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 53.258026][ T3597] ? netlink_unicast+0x7e0/0x7e0 [ 53.263071][ T3597] sock_sendmsg+0xcf/0x120 [ 53.267489][ T3597] __sys_sendto+0x21c/0x320 [ 53.272181][ T3597] ? __ia32_sys_getpeername+0xb0/0xb0 [ 53.278070][ T3597] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 53.284850][ T3597] ? __context_tracking_exit+0xb8/0xe0 [ 53.290861][ T3597] ? lock_downgrade+0x6e0/0x6e0 [ 53.295837][ T3597] ? lock_downgrade+0x6e0/0x6e0 [ 53.300854][ T3597] __x64_sys_sendto+0xdd/0x1b0 [ 53.305617][ T3597] ? lockdep_hardirqs_on+0x79/0x100 [ 53.310825][ T3597] ? syscall_enter_from_user_mode+0x21/0x70 [ 53.316716][ T3597] do_syscall_64+0x35/0xb0 [ 53.321127][ T3597] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 53.327012][ T3597] RIP: 0033:0x7f55a35d1e1c [ 53.331420][ T3597] 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 [ 53.351278][ T3597] RSP: 002b:00007ffcf2d3aa40 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 53.359687][ T3597] RAX: ffffffffffffffda RBX: 00007f55a466a320 RCX: 00007f55a35d1e1c [ 53.367650][ T3597] RDX: 0000000000000048 RSI: 00007f55a466a370 RDI: 0000000000000003 [ 53.375612][ T3597] RBP: 0000000000000000 R08: 00007ffcf2d3aa94 R09: 000000000000000c [ 53.383581][ T3597] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 53.391541][ T3597] R13: 00007f55a466a370 R14: 0000000000000003 R15: 0000000000000000 [ 53.399513][ T3597] [ 53.408945][ T3597] device hsr_slave_0 entered promiscuous mode [ 53.415717][ T3597] device hsr_slave_1 entered promiscuous mode [ 53.499821][ T3597] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 53.512121][ T3597] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 53.521656][ T3597] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 53.530740][ T3597] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 53.552277][ T3597] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.559630][ T3597] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.567983][ T3597] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.575093][ T3597] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.622350][ T3597] 8021q: adding VLAN 0 to HW filter on device bond0 [ 53.635568][ T3259] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.659793][ T3259] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.670567][ T3259] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.680785][ T3259] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 53.695048][ T3597] 8021q: adding VLAN 0 to HW filter on device team0 [ 53.705380][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 53.714302][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 53.722875][ T920] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.730045][ T920] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.756430][ T3597] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 53.767871][ T3597] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 53.780578][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 53.789341][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 53.799409][ T141] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.806492][ T141] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.814251][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 53.823090][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 53.831991][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 53.841112][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 53.849992][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 53.858888][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 53.867953][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 53.876395][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 53.885517][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 53.893901][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 53.903448][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 53.911400][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 53.928990][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 53.936515][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 53.948963][ T3597] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program [ 54.060685][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 54.070241][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 54.083923][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 54.092570][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 54.103792][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 54.112002][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 54.120890][ T3597] device veth0_vlan entered promiscuous mode [ 54.132792][ T3597] device veth1_vlan entered promiscuous mode [ 54.151274][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 54.159653][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 54.167947][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 54.176363][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 54.189220][ T3597] device veth0_macvtap entered promiscuous mode [ 54.198747][ T3597] device veth1_macvtap entered promiscuous mode [ 54.212732][ T3597] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 54.221260][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 54.229922][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 54.238747][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 54.249251][ T920] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 54.262058][ T3597] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 54.269565][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 54.278869][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 54.289446][ T3597] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.298910][ T3597] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.308912][ T3597] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.318278][ T3597] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 54.383008][ T11] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 54.394763][ T11] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 54.411231][ T3608] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 54.420947][ T54] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 54.429344][ T54] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 54.439904][ T3608] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2022/02/15 17:17:15 building call list... [ 54.670881][ T54] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 56.662473][ T3594] can: request_module (can-proto-0) failed. [ 56.685327][ T3594] can: request_module (can-proto-0) failed. [ 56.706734][ T3594] can: request_module (can-proto-0) failed. executing program [ 56.987158][ T54] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 57.179155][ T3597] syz-executor.0 (3597) used greatest stack depth: 22504 bytes left