DUID 00:04:15:32:48:1d:3b:73:54:4f:46:a6:7d:b2:d0:ec:1f:b1 forked to background, child pid 3173 [ 26.818456][ T3174] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.829314][ T3174] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.74' (ECDSA) to the list of known hosts. syzkaller login: [ 47.851839][ T3589] chnl_net:caif_netlink_parms(): no params data found [ 47.894305][ T3589] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.901836][ T3589] bridge0: port 1(bridge_slave_0) entered disabled state [ 47.910003][ T3589] device bridge_slave_0 entered promiscuous mode [ 47.919432][ T3589] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.926922][ T3589] bridge0: port 2(bridge_slave_1) entered disabled state [ 47.935406][ T3589] device bridge_slave_1 entered promiscuous mode [ 47.955344][ T3589] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 47.966742][ T3589] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 47.988918][ T3589] team0: Port device team_slave_0 added [ 47.996364][ T3589] team0: Port device team_slave_1 added [ 48.014150][ T3589] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 48.021227][ T3589] 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. [ 48.047251][ T3589] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 48.059762][ T3589] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 48.066813][ T3589] 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. [ 48.093160][ T3589] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 48.119268][ T3589] device hsr_slave_0 entered promiscuous mode [ 48.126531][ T3589] device hsr_slave_1 entered promiscuous mode [ 48.211724][ T3589] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 48.222615][ T3589] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 48.232156][ T3589] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 48.240948][ T3589] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 48.261528][ T3589] bridge0: port 2(bridge_slave_1) entered blocking state [ 48.268711][ T3589] bridge0: port 2(bridge_slave_1) entered forwarding state [ 48.276667][ T3589] bridge0: port 1(bridge_slave_0) entered blocking state [ 48.283806][ T3589] bridge0: port 1(bridge_slave_0) entered forwarding state [ 48.327411][ T3589] 8021q: adding VLAN 0 to HW filter on device bond0 [ 48.341132][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.351851][ T141] bridge0: port 1(bridge_slave_0) entered disabled state [ 48.361892][ T141] bridge0: port 2(bridge_slave_1) entered disabled state [ 48.370284][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 48.383502][ T3589] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.395032][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 48.403721][ T6] bridge0: port 1(bridge_slave_0) entered blocking state [ 48.410808][ T6] bridge0: port 1(bridge_slave_0) entered forwarding state [ 48.420539][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 48.429828][ T3596] bridge0: port 2(bridge_slave_1) entered blocking state [ 48.436932][ T3596] bridge0: port 2(bridge_slave_1) entered forwarding state [ 48.456175][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 48.465459][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 48.478415][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 48.492227][ T3589] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 48.504096][ T3589] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 48.517184][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 48.525958][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 48.535182][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 48.550660][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 48.559429][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 48.571267][ T3589] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 48.684977][ T141] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 48.698588][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 48.708142][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 48.715971][ T6] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 48.726458][ T3589] device veth0_vlan entered promiscuous mode [ 48.737299][ T3589] device veth1_vlan entered promiscuous mode [ 48.754625][ T14] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 48.762559][ T14] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 48.770751][ T14] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 48.782643][ T3589] device veth0_macvtap entered promiscuous mode [ 48.791720][ T3589] device veth1_macvtap entered promiscuous mode [ 48.807934][ T3589] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 48.815533][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 48.824952][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 48.837003][ T3589] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 48.846355][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 48.855658][ T3596] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 48.866503][ T3589] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 48.875805][ T3589] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 48.885032][ T3589] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 48.895199][ T3589] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 48.931813][ T3589] netlink: 'syz-executor156': attribute type 2 has an invalid length. [ 48.940600][ T3589] netlink: 194488 bytes leftover after parsing attributes in process `syz-executor156'. [ 48.950704][ T3589] [ 48.954602][ T3589] ============================= [ 48.959459][ T3589] WARNING: suspicious RCU usage [ 48.964345][ T3589] 5.18.0-rc3-syzkaller-00235-g22da5264abf4 #0 Not tainted [ 48.971451][ T3589] ----------------------------- [ 48.976675][ T3589] net/hsr/hsr_framereg.c:41 suspicious rcu_dereference_check() usage! [ 48.985351][ T3589] [ 48.985351][ T3589] other info that might help us debug this: [ 48.985351][ T3589] [ 48.996569][ T3589] [ 48.996569][ T3589] rcu_scheduler_active = 2, debug_locks = 1 [ 49.005975][ T3589] 3 locks held by syz-executor156/3589: [ 49.011519][ T3589] #0: ffffffff8d5ff210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 [ 49.020919][ T3589] #1: ffffffff8d5ff2c8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 [ 49.030327][ T3589] #2: ffffffff8bd820e0 (rcu_read_lock){....}-{1:2}, at: hsr_get_node_list+0xcb/0xa80 [ 49.041017][ T3589] [ 49.041017][ T3589] stack backtrace: [ 49.047480][ T3589] CPU: 1 PID: 3589 Comm: syz-executor156 Not tainted 5.18.0-rc3-syzkaller-00235-g22da5264abf4 #0 [ 49.057976][ T3589] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.068017][ T3589] Call Trace: [ 49.071279][ T3589] [ 49.074195][ T3589] dump_stack_lvl+0xcd/0x134 [ 49.078780][ T3589] hsr_node_get_first+0xc7/0xe0 [ 49.083619][ T3589] hsr_get_next_node+0x1d0/0x320 [ 49.088543][ T3589] hsr_get_node_list+0x333/0xa80 [ 49.093821][ T3589] ? hsr_get_node_status+0xcc0/0xcc0 [ 49.099094][ T3589] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 49.105318][ T3589] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x1b7/0x290 [ 49.112678][ T3589] ? genl_family_rcv_msg_attrs_parse.constprop.0+0xaf/0x290 [ 49.119966][ T3589] genl_family_rcv_msg_doit+0x228/0x320 [ 49.125502][ T3589] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 49.132862][ T3589] ? mutex_lock_io_nested+0x1150/0x1150 [ 49.138416][ T3589] ? genl_op_from_small+0x23/0x3c0 [ 49.143516][ T3589] ? genl_get_cmd+0x3cf/0x480 [ 49.148181][ T3589] genl_rcv_msg+0x328/0x580 [ 49.152677][ T3589] ? genl_get_cmd+0x480/0x480 [ 49.157355][ T3589] ? hsr_get_node_status+0xcc0/0xcc0 [ 49.162635][ T3589] ? lock_release+0x720/0x720 [ 49.167298][ T3589] ? ref_tracker_dir_exit+0x3e0/0x3e0 [ 49.172657][ T3589] netlink_rcv_skb+0x153/0x420 [ 49.177425][ T3589] ? genl_get_cmd+0x480/0x480 [ 49.182097][ T3589] ? netlink_ack+0xa80/0xa80 [ 49.186692][ T3589] ? netlink_deliver_tap+0x1b1/0xc40 [ 49.191974][ T3589] genl_rcv+0x24/0x40 [ 49.195946][ T3589] netlink_unicast+0x543/0x7f0 [ 49.200704][ T3589] ? netlink_attachskb+0x880/0x880 [ 49.205809][ T3589] ? __virt_addr_valid+0x5d/0x2d0 [ 49.210825][ T3589] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 49.217051][ T3589] ? __phys_addr_symbol+0x2c/0x70 [ 49.222063][ T3589] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 49.227765][ T3589] ? __check_object_size+0x16c/0x4f0 [ 49.233040][ T3589] netlink_sendmsg+0x904/0xe00 [ 49.237824][ T3589] ? netlink_unicast+0x7f0/0x7f0 [ 49.242757][ T3589] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 49.248983][ T3589] ? netlink_unicast+0x7f0/0x7f0 [ 49.253912][ T3589] sock_sendmsg+0xcf/0x120 [ 49.258321][ T3589] ____sys_sendmsg+0x6e2/0x800 [ 49.263076][ T3589] ? kernel_sendmsg+0x50/0x50 [ 49.267743][ T3589] ? do_recvmmsg+0x6d0/0x6d0 [ 49.272312][ T3589] ? find_held_lock+0x2d/0x110 [ 49.277066][ T3589] ? find_held_lock+0x2d/0x110 [ 49.281816][ T3589] ___sys_sendmsg+0xf3/0x170 [ 49.286390][ T3589] ? sendmsg_copy_msghdr+0x160/0x160 [ 49.291666][ T3589] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 49.297633][ T3589] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 49.303609][ T3589] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 49.309848][ T3589] ? __fget_light+0x20f/0x270 [ 49.314524][ T3589] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 49.320879][ T3589] __sys_sendmsg+0xe5/0x1b0 [ 49.325377][ T3589] ? __sys_sendmsg_sock+0x30/0x30 [ 49.330398][ T3589] ? syscall_enter_from_user_mode+0x21/0x70 [ 49.336288][ T3589] do_syscall_64+0x35/0xb0 [ 49.340716][ T3589] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 49.346599][ T3589] RIP: 0033:0x7fb779cfc8d9 [ 49.351002][ T3589] 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 [ 49.370597][ T3589] RSP: 002b:00007ffe75a56d68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 49.379016][ T3589] RAX: ffffffffffffffda RBX: 00007ffe75a56d78 RCX: 00007fb779cfc8d9 [ 49.386991][ T3589] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 49.394955][ T3589] RBP: 0000000000000003 R08: bb1414ac00000000 R09: bb1414ac00000000 [ 49.402911][ T3589] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe75a56d80 [ 49.410880][ T3589] R13: 00007ffe75a56d74 R14: 0000000000000003 R15: 0000000000000000 [ 49.418865][ T3589]