DUID 00:04:1e:62:2e:d3:28:4c:47:2c:f6:06:4a:96:1e:52:1a:b0 forked to background, child pid 3175 [ 27.935546][ T3176] 8021q: adding VLAN 0 to HW filter on device bond0 [ 27.946887][ T3176] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.10.44' (ECDSA) to the list of known hosts. 2022/02/28 23:39:11 fuzzer started 2022/02/28 23:39:12 connecting to host at 10.128.0.169:45265 2022/02/28 23:39:12 checking machine... 2022/02/28 23:39:12 checking revisions... 2022/02/28 23:39:12 testing simple program... syzkaller login: [ 49.162719][ T3597] cgroup: Unknown subsys name 'net' [ 49.272658][ T3597] cgroup: Unknown subsys name 'rlimit' [ 50.494500][ T3600] Bluetooth: hci0: unexpected cc 0x0c03 length: 249 > 1 [ 50.503244][ T3600] Bluetooth: hci0: unexpected cc 0x1003 length: 249 > 9 [ 50.510991][ T3600] Bluetooth: hci0: unexpected cc 0x1001 length: 249 > 9 [ 50.518970][ T3600] Bluetooth: hci0: unexpected cc 0x0c23 length: 249 > 4 [ 50.527241][ T3600] Bluetooth: hci0: unexpected cc 0x0c25 length: 249 > 3 [ 50.534638][ T3600] Bluetooth: hci0: unexpected cc 0x0c38 length: 249 > 2 [ 50.622976][ T3599] chnl_net:caif_netlink_parms(): no params data found [ 50.665887][ T3599] bridge0: port 1(bridge_slave_0) entered blocking state [ 50.673442][ T3599] bridge0: port 1(bridge_slave_0) entered disabled state [ 50.682339][ T3599] device bridge_slave_0 entered promiscuous mode [ 50.691932][ T3599] bridge0: port 2(bridge_slave_1) entered blocking state [ 50.699267][ T3599] bridge0: port 2(bridge_slave_1) entered disabled state [ 50.708543][ T3599] device bridge_slave_1 entered promiscuous mode [ 50.730955][ T3599] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 50.741849][ T3599] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 50.766751][ T3599] team0: Port device team_slave_0 added [ 50.774938][ T3599] team0: Port device team_slave_1 added [ 50.792784][ T3599] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 50.800437][ T3599] 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. [ 50.826896][ T3599] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 50.839998][ T3599] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 50.847318][ T3599] 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. [ 50.874345][ T3599] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 50.898524][ T3599] [ 50.900969][ T3599] ============================= [ 50.905862][ T3599] WARNING: suspicious RCU usage [ 50.910766][ T3599] 5.17.0-rc4-syzkaller-01374-gb664e255ba3c #0 Not tainted [ 50.918019][ T3599] ----------------------------- [ 50.922888][ T3599] net/hsr/hsr_framereg.c:34 suspicious rcu_dereference_check() usage! [ 50.931098][ T3599] [ 50.931098][ T3599] other info that might help us debug this: [ 50.931098][ T3599] [ 50.941636][ T3599] [ 50.941636][ T3599] rcu_scheduler_active = 2, debug_locks = 1 [ 50.950101][ T3599] 2 locks held by syz-executor.0/3599: [ 50.955883][ T3599] #0: ffffffff8d3308e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 [ 50.965353][ T3599] #1: ffff88801d4515f0 (&hsr->list_lock){+...}-{2:2}, at: hsr_create_self_node+0x225/0x650 [ 50.975546][ T3599] [ 50.975546][ T3599] stack backtrace: [ 50.981477][ T3599] CPU: 0 PID: 3599 Comm: syz-executor.0 Not tainted 5.17.0-rc4-syzkaller-01374-gb664e255ba3c #0 [ 50.992095][ T3599] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.002544][ T3599] Call Trace: [ 51.005999][ T3599] [ 51.008945][ T3599] dump_stack_lvl+0xcd/0x134 [ 51.013717][ T3599] hsr_node_get_first+0x9b/0xb0 [ 51.018589][ T3599] hsr_create_self_node+0x22d/0x650 [ 51.023873][ T3599] hsr_dev_finalize+0x2c1/0x7d0 [ 51.028727][ T3599] hsr_newlink+0x315/0x730 [ 51.033137][ T3599] ? hsr_dellink+0x130/0x130 [ 51.037722][ T3599] ? rtnl_create_link+0x7e8/0xc00 [ 51.042745][ T3599] ? hsr_dellink+0x130/0x130 [ 51.047328][ T3599] __rtnl_newlink+0x107c/0x1760 [ 51.052189][ T3599] ? rtnl_setlink+0x3c0/0x3c0 [ 51.056965][ T3599] ? is_bpf_text_address+0x77/0x170 [ 51.062166][ T3599] ? lock_downgrade+0x6e0/0x6e0 [ 51.067018][ T3599] ? unwind_next_frame+0xee1/0x1ce0 [ 51.072300][ T3599] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 51.078464][ T3599] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 51.084200][ T3599] ? is_bpf_text_address+0x99/0x170 [ 51.089486][ T3599] ? kernel_text_address+0x39/0x80 [ 51.094594][ T3599] ? __kernel_text_address+0x9/0x30 [ 51.099830][ T3599] ? unwind_get_return_address+0x51/0x90 [ 51.105571][ T3599] ? create_prof_cpu_mask+0x20/0x20 [ 51.110773][ T3599] ? arch_stack_walk+0x93/0xe0 [ 51.115599][ T3599] ? rcu_read_lock_sched_held+0x3a/0x70 [ 51.121495][ T3599] rtnl_newlink+0x64/0xa0 [ 51.126170][ T3599] ? __rtnl_newlink+0x1760/0x1760 [ 51.131372][ T3599] rtnetlink_rcv_msg+0x413/0xb80 [ 51.136421][ T3599] ? rtnl_fdb_dump+0x9a0/0x9a0 [ 51.141199][ T3599] netlink_rcv_skb+0x153/0x420 [ 51.146102][ T3599] ? rtnl_fdb_dump+0x9a0/0x9a0 [ 51.151042][ T3599] ? netlink_ack+0xa60/0xa60 [ 51.155629][ T3599] ? netlink_deliver_tap+0x1a2/0xc40 [ 51.160924][ T3599] ? netlink_deliver_tap+0x1b1/0xc40 [ 51.166324][ T3599] netlink_unicast+0x539/0x7e0 [ 51.171352][ T3599] ? netlink_attachskb+0x880/0x880 [ 51.176843][ T3599] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 51.183884][ T3599] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 51.190334][ T3599] ? __phys_addr_symbol+0x2c/0x70 [ 51.195995][ T3599] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 51.201730][ T3599] ? __check_object_size+0x16e/0x310 [ 51.207039][ T3599] netlink_sendmsg+0x904/0xe00 [ 51.211866][ T3599] ? netlink_unicast+0x7e0/0x7e0 [ 51.217287][ T3599] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 51.224214][ T3599] ? netlink_unicast+0x7e0/0x7e0 [ 51.229153][ T3599] sock_sendmsg+0xcf/0x120 [ 51.233662][ T3599] __sys_sendto+0x21c/0x320 [ 51.238337][ T3599] ? __ia32_sys_getpeername+0xb0/0xb0 [ 51.243791][ T3599] ? lockdep_hardirqs_on+0x79/0x100 [ 51.249358][ T3599] ? __context_tracking_exit+0xb8/0xe0 [ 51.254991][ T3599] ? lock_downgrade+0x6e0/0x6e0 [ 51.260166][ T3599] __x64_sys_sendto+0xdd/0x1b0 [ 51.265116][ T3599] ? lockdep_hardirqs_on+0x79/0x100 [ 51.270316][ T3599] ? syscall_enter_from_user_mode+0x21/0x70 [ 51.276204][ T3599] do_syscall_64+0x35/0xb0 [ 51.280665][ T3599] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 51.286761][ T3599] RIP: 0033:0x7f714d1c3e0c [ 51.291671][ T3599] 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 [ 51.311632][ T3599] RSP: 002b:00007ffdb0a194e0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 51.320333][ T3599] RAX: ffffffffffffffda RBX: 00007f714e25c320 RCX: 00007f714d1c3e0c [ 51.328665][ T3599] RDX: 0000000000000048 RSI: 00007f714e25c370 RDI: 0000000000000003 [ 51.336901][ T3599] RBP: 0000000000000000 R08: 00007ffdb0a19534 R09: 000000000000000c [ 51.345500][ T3599] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 51.353646][ T3599] R13: 00007f714e25c370 R14: 0000000000000003 R15: 0000000000000000 [ 51.361743][ T3599] [ 51.371985][ T3599] device hsr_slave_0 entered promiscuous mode [ 51.379713][ T3599] device hsr_slave_1 entered promiscuous mode [ 51.459630][ T3599] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 51.470665][ T3599] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 51.480636][ T3599] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 51.489740][ T3599] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 51.511920][ T3599] bridge0: port 2(bridge_slave_1) entered blocking state [ 51.519754][ T3599] bridge0: port 2(bridge_slave_1) entered forwarding state [ 51.527836][ T3599] bridge0: port 1(bridge_slave_0) entered blocking state [ 51.534924][ T3599] bridge0: port 1(bridge_slave_0) entered forwarding state [ 51.580783][ T3599] 8021q: adding VLAN 0 to HW filter on device bond0 [ 51.593649][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 51.605280][ T6] bridge0: port 1(bridge_slave_0) entered disabled state [ 51.614532][ T6] bridge0: port 2(bridge_slave_1) entered disabled state [ 51.622868][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 51.636394][ T3599] 8021q: adding VLAN 0 to HW filter on device team0 [ 51.647775][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 51.656447][ T6] bridge0: port 1(bridge_slave_0) entered blocking state [ 51.663508][ T6] bridge0: port 1(bridge_slave_0) entered forwarding state [ 51.678175][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 51.687505][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 51.696754][ T21] bridge0: port 2(bridge_slave_1) entered blocking state [ 51.704176][ T21] bridge0: port 2(bridge_slave_1) entered forwarding state [ 51.726513][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 51.736049][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 51.744648][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 51.754268][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 51.762763][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 51.771275][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 51.780039][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 51.788376][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 51.796737][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 51.805756][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 51.814468][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 51.824974][ T3599] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 51.842332][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 51.850675][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 51.862539][ T3599] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program [ 51.976461][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 51.986578][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 52.002053][ T3599] device veth0_vlan entered promiscuous mode [ 52.009451][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 52.018987][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 52.028979][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 52.037138][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 52.048897][ T3599] device veth1_vlan entered promiscuous mode [ 52.066239][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 52.074939][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 52.084188][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 52.093004][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 52.104678][ T3599] device veth0_macvtap entered promiscuous mode [ 52.115081][ T3599] device veth1_macvtap entered promiscuous mode [ 52.130530][ T3599] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 52.139923][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 52.148646][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 52.157785][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 52.167172][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 52.179707][ T3599] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 52.187062][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 52.196239][ T39] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 52.207145][ T3599] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 52.217520][ T3599] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 52.226429][ T3599] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 52.235400][ T3599] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 52.294070][ T1024] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 52.309556][ T1024] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 52.321755][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 52.330825][ T1024] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 52.339619][ T1024] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 52.348632][ T21] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2022/02/28 23:39:15 building call list... [ 52.572693][ T1024] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 54.852470][ T3596] can: request_module (can-proto-0) failed. [ 54.874331][ T3596] can: request_module (can-proto-0) failed. [ 54.897139][ T3596] can: request_module (can-proto-0) failed. executing program [ 55.087382][ T3599] syz-executor.0 (3599) used greatest stack depth: 22792 bytes left [ 55.127101][ T1024] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0