DUID 00:04:92:3d:a4:bf:d8:99:95:1d:d2:9f:0e:34:7d:20:a7:e6 forked to background, child pid 3170 [ 26.739145][ T3171] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.749126][ T3171] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.16' (ECDSA) to the list of known hosts. syzkaller login: [ 49.106403][ T3587] chnl_net:caif_netlink_parms(): no params data found [ 49.147684][ T3587] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.155119][ T3587] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.163428][ T3587] device bridge_slave_0 entered promiscuous mode [ 49.172360][ T3587] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.179697][ T3587] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.187495][ T3587] device bridge_slave_1 entered promiscuous mode [ 49.207031][ T3587] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 49.218132][ T3587] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 49.240966][ T3587] team0: Port device team_slave_0 added [ 49.248465][ T3587] team0: Port device team_slave_1 added [ 49.265750][ T3587] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 49.272685][ T3587] 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. [ 49.298687][ T3587] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 49.311170][ T3587] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 49.318450][ T3587] 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. [ 49.344797][ T3587] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 49.370613][ T3587] device hsr_slave_0 entered promiscuous mode [ 49.377288][ T3587] device hsr_slave_1 entered promiscuous mode [ 49.460103][ T3587] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 49.471331][ T3587] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 49.479854][ T3587] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 49.488934][ T3587] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 49.509068][ T3587] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.516289][ T3587] bridge0: port 2(bridge_slave_1) entered forwarding state [ 49.523880][ T3587] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.531005][ T3587] bridge0: port 1(bridge_slave_0) entered forwarding state [ 49.573974][ T3587] 8021q: adding VLAN 0 to HW filter on device bond0 [ 49.585199][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 49.595048][ T26] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.604506][ T26] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.612568][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 49.625341][ T3587] 8021q: adding VLAN 0 to HW filter on device team0 [ 49.636465][ T14] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 49.646884][ T14] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.653948][ T14] bridge0: port 1(bridge_slave_0) entered forwarding state [ 49.677551][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 49.686982][ T26] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.694129][ T26] bridge0: port 2(bridge_slave_1) entered forwarding state [ 49.703168][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 49.712485][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 49.721124][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 49.733710][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 49.741780][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 49.751811][ T3587] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 49.771727][ T3587] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 49.781034][ T3594] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 49.788700][ T3594] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 49.898250][ T142] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 49.911796][ T3594] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 49.922510][ T3594] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 49.930327][ T3594] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 49.939024][ T3587] device veth0_vlan entered promiscuous mode [ 49.949603][ T3587] device veth1_vlan entered promiscuous mode [ 49.967574][ T14] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 49.975795][ T14] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 49.983842][ T14] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 49.994239][ T3587] device veth0_macvtap entered promiscuous mode [ 50.003811][ T3587] device veth1_macvtap entered promiscuous mode [ 50.019090][ T3587] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 50.027412][ T142] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 50.037218][ T142] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 50.047995][ T3587] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 50.056384][ T142] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 50.067807][ T3587] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 50.077380][ T3587] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 50.086843][ T3587] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 50.097069][ T3587] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 50.131964][ T3587] netlink: 'syz-executor131': attribute type 2 has an invalid length. [ 50.141671][ T3587] netlink: 194488 bytes leftover after parsing attributes in process `syz-executor131'. [ 50.151588][ T3587] [ 50.154000][ T3587] ============================= [ 50.159471][ T3587] WARNING: suspicious RCU usage [ 50.164328][ T3587] 5.18.0-rc3-next-20220420-syzkaller #0 Not tainted [ 50.172189][ T3587] ----------------------------- [ 50.177817][ T3587] net/hsr/hsr_framereg.c:41 suspicious rcu_dereference_check() usage! [ 50.186805][ T3587] [ 50.186805][ T3587] other info that might help us debug this: [ 50.186805][ T3587] [ 50.197328][ T3587] [ 50.197328][ T3587] rcu_scheduler_active = 2, debug_locks = 1 [ 50.205381][ T3587] 3 locks held by syz-executor131/3587: [ 50.211399][ T3587] #0: ffffffff8d60a930 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 [ 50.219775][ T3587] #1: ffffffff8d60a9e8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 [ 50.228956][ T3587] #2: ffffffff8bd84f60 (rcu_read_lock){....}-{1:2}, at: hsr_get_node_list+0xcb/0xa80 [ 50.238670][ T3587] [ 50.238670][ T3587] stack backtrace: [ 50.244743][ T3587] CPU: 1 PID: 3587 Comm: syz-executor131 Not tainted 5.18.0-rc3-next-20220420-syzkaller #0 [ 50.254717][ T3587] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.264761][ T3587] Call Trace: [ 50.268032][ T3587] [ 50.270957][ T3587] dump_stack_lvl+0xcd/0x134 [ 50.275559][ T3587] hsr_node_get_first+0xc7/0xe0 [ 50.280415][ T3587] hsr_get_next_node+0x1d0/0x320 [ 50.285356][ T3587] hsr_get_node_list+0x333/0xa80 [ 50.290302][ T3587] ? hsr_get_node_status+0xcc0/0xcc0 [ 50.295595][ T3587] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 50.301835][ T3587] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x1b7/0x290 [ 50.309211][ T3587] ? genl_family_rcv_msg_attrs_parse.constprop.0+0xaf/0x290 [ 50.316504][ T3587] genl_family_rcv_msg_doit+0x228/0x320 [ 50.322145][ T3587] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 50.329517][ T3587] ? mutex_lock_io_nested+0x1190/0x1190 [ 50.335077][ T3587] ? genl_op_from_small+0x23/0x3c0 [ 50.340195][ T3587] ? genl_get_cmd+0x3cf/0x480 [ 50.344879][ T3587] genl_rcv_msg+0x328/0x580 [ 50.349389][ T3587] ? genl_get_cmd+0x480/0x480 [ 50.354066][ T3587] ? hsr_get_node_status+0xcc0/0xcc0 [ 50.359359][ T3587] ? lock_release+0x780/0x780 [ 50.364037][ T3587] ? ref_tracker_dir_exit+0x3e0/0x3e0 [ 50.369412][ T3587] netlink_rcv_skb+0x153/0x420 [ 50.374177][ T3587] ? genl_get_cmd+0x480/0x480 [ 50.378857][ T3587] ? netlink_ack+0xa80/0xa80 [ 50.383455][ T3587] ? netlink_deliver_tap+0x1b1/0xc40 [ 50.388745][ T3587] genl_rcv+0x24/0x40 [ 50.392729][ T3587] netlink_unicast+0x543/0x7f0 [ 50.397498][ T3587] ? netlink_attachskb+0x880/0x880 [ 50.402610][ T3587] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 50.408845][ T3587] ? __phys_addr_symbol+0x2c/0x70 [ 50.413871][ T3587] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 50.419587][ T3587] ? __check_object_size+0x16e/0x7a0 [ 50.424884][ T3587] netlink_sendmsg+0x904/0xe00 [ 50.429653][ T3587] ? netlink_unicast+0x7f0/0x7f0 [ 50.434599][ T3587] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 50.440839][ T3587] ? netlink_unicast+0x7f0/0x7f0 [ 50.446130][ T3587] sock_sendmsg+0xcf/0x120 [ 50.450546][ T3587] ____sys_sendmsg+0x6e2/0x800 [ 50.455312][ T3587] ? kernel_sendmsg+0x50/0x50 [ 50.459986][ T3587] ? do_recvmmsg+0x6d0/0x6d0 [ 50.464579][ T3587] ? find_held_lock+0x2d/0x110 [ 50.469349][ T3587] ? find_held_lock+0x2d/0x110 [ 50.474120][ T3587] ___sys_sendmsg+0xf3/0x170 [ 50.478722][ T3587] ? sendmsg_copy_msghdr+0x160/0x160 [ 50.484020][ T3587] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 50.490006][ T3587] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 50.495998][ T3587] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 50.502235][ T3587] ? __fget_light+0x20f/0x270 [ 50.506910][ T3587] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 50.513154][ T3587] __sys_sendmsg+0xe5/0x1b0 [ 50.517663][ T3587] ? __sys_sendmsg_sock+0x30/0x30 [ 50.522700][ T3587] ? syscall_enter_from_user_mode+0x21/0x70 [ 50.528595][ T3587] do_syscall_64+0x35/0xb0 [ 50.533010][ T3587] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.538903][ T3587] RIP: 0033:0x7f968caf38d9 [ 50.543309][ T3587] Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 50.562907][ T3587] RSP: 002b:00007ffe91a12c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 50.571315][ T3587] RAX: ffffffffffffffda RBX: 00007ffe91a12c78 RCX: 00007f968caf38d9 [ 50.579283][ T3587] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 50.587243][ T3587] RBP: 0000000000000003 R08: bb1414ac00000000 R09: bb1414ac00000000 [ 50.595204][ T3587] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe91a12c80 [ 50.603169][ T3587] R13: 00007ffe91a12c74 R14: 0000000000000003 R15: 0000000000000000 [ 50.611143][ T3587]