forked to background, child pid 3173 [ 29.906834][ T3174] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.918762][ T3174] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: [ 30.306969][ T3266] sshd (3266) used greatest stack depth: 22832 bytes left OK syzkaller Warning: Permanently added '10.128.0.213' (ECDSA) to the list of known hosts. 2022/02/17 16:48:20 fuzzer started 2022/02/17 16:48:20 connecting to host at 10.128.0.169:35207 2022/02/17 16:48:20 checking machine... 2022/02/17 16:48:20 checking revisions... 2022/02/17 16:48:20 testing simple program... syzkaller login: [ 50.667253][ T3594] cgroup: Unknown subsys name 'net' [ 50.811796][ T3594] cgroup: Unknown subsys name 'rlimit' [ 52.034214][ T3597] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 52.042817][ T3597] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 52.050785][ T3597] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 52.058985][ T3597] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 52.067401][ T3597] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 52.075052][ T3597] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 52.163717][ T3596] chnl_net:caif_netlink_parms(): no params data found [ 52.207518][ T3596] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.215129][ T3596] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.222958][ T3596] device bridge_slave_0 entered promiscuous mode [ 52.233144][ T3596] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.240880][ T3596] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.249025][ T3596] device bridge_slave_1 entered promiscuous mode [ 52.269736][ T3596] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 52.280905][ T3596] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 52.304046][ T3596] team0: Port device team_slave_0 added [ 52.311558][ T3596] team0: Port device team_slave_1 added [ 52.328722][ T3596] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 52.335773][ 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. [ 52.361880][ T3596] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 52.375169][ T3596] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 52.382110][ 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. [ 52.408321][ T3596] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 52.432414][ T3596] [ 52.434890][ T3596] ============================= [ 52.439819][ T3596] WARNING: suspicious RCU usage [ 52.444753][ T3596] 5.17.0-rc3-syzkaller-01249-gfaab39f63c1f #0 Not tainted [ 52.452184][ T3596] ----------------------------- [ 52.457053][ T3596] net/hsr/hsr_framereg.c:34 suspicious rcu_dereference_check() usage! [ 52.465333][ T3596] [ 52.465333][ T3596] other info that might help us debug this: [ 52.465333][ T3596] [ 52.475688][ T3596] [ 52.475688][ T3596] rcu_scheduler_active = 2, debug_locks = 1 [ 52.483934][ T3596] 2 locks held by syz-executor.0/3596: [ 52.489684][ T3596] #0: ffffffff8d32cb28 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 [ 52.499358][ T3596] #1: ffff88801ca655f0 (&hsr->list_lock){+...}-{2:2}, at: hsr_create_self_node+0x225/0x650 [ 52.509528][ T3596] [ 52.509528][ T3596] stack backtrace: [ 52.515442][ T3596] CPU: 0 PID: 3596 Comm: syz-executor.0 Not tainted 5.17.0-rc3-syzkaller-01249-gfaab39f63c1f #0 [ 52.525863][ T3596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.536800][ T3596] Call Trace: [ 52.540076][ T3596] [ 52.543300][ T3596] dump_stack_lvl+0xcd/0x134 [ 52.548068][ T3596] hsr_node_get_first+0x9b/0xb0 [ 52.552922][ T3596] hsr_create_self_node+0x22d/0x650 [ 52.558335][ T3596] hsr_dev_finalize+0x2c1/0x7d0 [ 52.563396][ T3596] hsr_newlink+0x315/0x730 [ 52.567905][ T3596] ? hsr_dellink+0x130/0x130 [ 52.572673][ T3596] ? rtnl_create_link+0x7e8/0xc00 [ 52.577700][ T3596] ? hsr_dellink+0x130/0x130 [ 52.582386][ T3596] __rtnl_newlink+0x107c/0x1760 [ 52.587313][ T3596] ? rtnl_setlink+0x3c0/0x3c0 [ 52.592223][ T3596] ? is_bpf_text_address+0x77/0x170 [ 52.597502][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 52.602454][ T3596] ? unwind_next_frame+0xee1/0x1ce0 [ 52.607653][ T3596] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 52.613741][ T3596] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 52.619563][ T3596] ? is_bpf_text_address+0x99/0x170 [ 52.624786][ T3596] ? kernel_text_address+0x39/0x80 [ 52.630091][ T3596] ? __kernel_text_address+0x9/0x30 [ 52.635563][ T3596] ? unwind_get_return_address+0x51/0x90 [ 52.641197][ T3596] ? create_prof_cpu_mask+0x20/0x20 [ 52.646503][ T3596] ? arch_stack_walk+0x93/0xe0 [ 52.651691][ T3596] ? kmem_cache_alloc_trace+0x42/0x2c0 [ 52.657427][ T3596] ? rcu_read_lock_sched_held+0x3a/0x70 [ 52.662995][ T3596] rtnl_newlink+0x64/0xa0 [ 52.667331][ T3596] ? __rtnl_newlink+0x1760/0x1760 [ 52.672366][ T3596] rtnetlink_rcv_msg+0x413/0xb80 [ 52.677312][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 52.682213][ T3596] netlink_rcv_skb+0x153/0x420 [ 52.686999][ T3596] ? rtnl_newlink+0xa0/0xa0 [ 52.691707][ T3596] ? netlink_ack+0xa60/0xa60 [ 52.696313][ T3596] ? netlink_deliver_tap+0x1a2/0xc40 [ 52.701621][ T3596] ? netlink_deliver_tap+0x1b1/0xc40 [ 52.706937][ T3596] netlink_unicast+0x539/0x7e0 [ 52.711729][ T3596] ? netlink_attachskb+0x880/0x880 [ 52.716983][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 52.723234][ T3596] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 52.729484][ T3596] ? __phys_addr_symbol+0x2c/0x70 [ 52.734531][ T3596] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 52.740280][ T3596] ? __check_object_size+0x16e/0x310 [ 52.745574][ T3596] netlink_sendmsg+0x904/0xe00 [ 52.750348][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 52.755293][ T3596] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 52.761538][ T3596] ? netlink_unicast+0x7e0/0x7e0 [ 52.766474][ T3596] sock_sendmsg+0xcf/0x120 [ 52.770894][ T3596] __sys_sendto+0x21c/0x320 [ 52.775408][ T3596] ? __ia32_sys_getpeername+0xb0/0xb0 [ 52.780779][ T3596] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 52.786780][ T3596] ? __context_tracking_exit+0xb8/0xe0 [ 52.792417][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 52.797276][ T3596] ? lock_downgrade+0x6e0/0x6e0 [ 52.802261][ T3596] __x64_sys_sendto+0xdd/0x1b0 [ 52.807341][ T3596] ? lockdep_hardirqs_on+0x79/0x100 [ 52.812640][ T3596] ? syscall_enter_from_user_mode+0x21/0x70 [ 52.819013][ T3596] do_syscall_64+0x35/0xb0 [ 52.823449][ T3596] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 52.829340][ T3596] RIP: 0033:0x7f0a88febe1c [ 52.833750][ 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 [ 52.853617][ T3596] RSP: 002b:00007ffffc904550 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 52.862035][ T3596] RAX: ffffffffffffffda RBX: 00007f0a8a084320 RCX: 00007f0a88febe1c [ 52.870180][ T3596] RDX: 0000000000000048 RSI: 00007f0a8a084370 RDI: 0000000000000003 [ 52.878148][ T3596] RBP: 0000000000000000 R08: 00007ffffc9045a4 R09: 000000000000000c [ 52.886113][ T3596] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 52.894290][ T3596] R13: 00007f0a8a084370 R14: 0000000000000003 R15: 0000000000000000 [ 52.902478][ T3596] [ 52.912956][ T3596] device hsr_slave_0 entered promiscuous mode [ 52.920468][ T3596] device hsr_slave_1 entered promiscuous mode [ 53.001233][ T3596] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 53.011968][ T3596] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 53.021536][ T3596] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 53.030445][ T3596] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 53.051371][ T3596] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.058744][ T3596] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.066912][ T3596] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.074069][ T3596] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.121719][ T3596] 8021q: adding VLAN 0 to HW filter on device bond0 [ 53.133999][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.146421][ T140] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.156337][ T140] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.164279][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 53.178560][ T3596] 8021q: adding VLAN 0 to HW filter on device team0 [ 53.188366][ T3606] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 53.197048][ T3606] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 53.206305][ T3606] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.213375][ T3606] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.238918][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 53.248780][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 53.257662][ T3607] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.264804][ T3607] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.273332][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 53.282784][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 53.292038][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 53.301056][ T3607] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 53.312995][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 53.323600][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 53.332629][ T25] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 53.349356][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 53.358213][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 53.367187][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 53.376002][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 53.386192][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 53.402644][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 53.410624][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 53.424365][ T3596] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program [ 53.557626][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 53.567122][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 53.584353][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 53.593174][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 53.603899][ T3596] device veth0_vlan entered promiscuous mode [ 53.610774][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 53.619220][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 53.631915][ T3596] device veth1_vlan entered promiscuous mode [ 53.651280][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 53.660003][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 53.668518][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 53.677553][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 53.687826][ T3596] device veth0_macvtap entered promiscuous mode [ 53.699161][ T3596] device veth1_macvtap entered promiscuous mode [ 53.713091][ T3596] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 53.721734][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 53.730102][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 53.739120][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 53.748063][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 53.760339][ T3596] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 53.768172][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 53.776949][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 53.788766][ T3596] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.798158][ T3596] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.807276][ T3596] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.817144][ T3596] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.876703][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 53.888426][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 53.904757][ T11] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 53.913204][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 53.914647][ T11] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 53.930450][ T140] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2022/02/17 16:48:24 building call list... [ 54.196614][ T90] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 56.387380][ T90] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 56.426817][ T3589] can: request_module (can-proto-0) failed. executing program [ 56.450160][ T3589] can: request_module (can-proto-0) failed. [ 56.471476][ T3589] can: request_module (can-proto-0) failed.