[ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.228' (ECDSA) to the list of known hosts. syzkaller login: [ 57.780356][ T6876] IPVS: ftp: loaded support on port[0] = 21 [ 57.883452][ T6876] chnl_net:caif_netlink_parms(): no params data found [ 57.939400][ T6876] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.956138][ T6876] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.964429][ T6876] device bridge_slave_0 entered promiscuous mode [ 57.973192][ T6876] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.980894][ T6876] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.988728][ T6876] device bridge_slave_1 entered promiscuous mode [ 58.009746][ T6876] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.021368][ T6876] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.046815][ T6876] team0: Port device team_slave_0 added [ 58.054938][ T6876] team0: Port device team_slave_1 added [ 58.073157][ T6876] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 58.080228][ T6876] 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. [ 58.106489][ T6876] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 58.120299][ T6876] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 58.127271][ T6876] 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. [ 58.154528][ T6876] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 58.181614][ T6876] device hsr_slave_0 entered promiscuous mode [ 58.188410][ T6876] device hsr_slave_1 entered promiscuous mode [ 58.287850][ T6876] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.298800][ T6876] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.308560][ T6876] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.317466][ T6876] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.343415][ T6876] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.350597][ T6876] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.358376][ T6876] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.365439][ T6876] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.412194][ T6876] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.425468][ T3946] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.436834][ T3946] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.446113][ T3946] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.454244][ T3946] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 58.467218][ T6876] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.478919][ T2637] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.487411][ T2637] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.494536][ T2637] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.520667][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.530401][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.537456][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.546359][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 58.556368][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 58.565741][ T2637] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 58.577176][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 58.591559][ T6876] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 58.603624][ T6876] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 58.612415][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 58.631340][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 58.639628][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 58.652949][ T6876] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 58.673073][ T2637] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 58.693374][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 58.701692][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 58.709640][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 58.721723][ T6876] device veth0_vlan entered promiscuous mode [ 58.733243][ T6876] device veth1_vlan entered promiscuous mode [ 58.755001][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 58.763737][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 58.772917][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 58.783738][ T6876] device veth0_macvtap entered promiscuous mode [ 58.793575][ T6876] device veth1_macvtap entered promiscuous mode [ 58.811269][ T6876] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 58.819409][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 58.829254][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 58.841780][ T6876] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 58.852683][ T2637] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 58.864347][ T6876] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 58.876566][ T6876] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 58.887477][ T6876] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 58.898277][ T6876] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 59.027262][ T6876] [ 59.029938][ T6876] ============================= [ 59.034787][ T6876] WARNING: suspicious RCU usage [ 59.039774][ T6876] 5.9.0-rc6-syzkaller #0 Not tainted [ 59.045069][ T6876] ----------------------------- [ 59.050492][ T6876] drivers/net/bonding/bond_main.c:395 suspicious rcu_dereference_check() usage! [ 59.060245][ T6876] [ 59.060245][ T6876] other info that might help us debug this: [ 59.060245][ T6876] [ 59.071415][ T6876] [ 59.071415][ T6876] rcu_scheduler_active = 2, debug_locks = 1 [ 59.081093][ T6876] 1 lock held by syz-executor633/6876: [ 59.086538][ T6876] #0: ffff88809372ba68 (&net->xfrm.xfrm_cfg_mutex){+.+.}-{3:3}, at: xfrm_netlink_rcv+0x5c/0x90 [ 59.097238][ T6876] [ 59.097238][ T6876] stack backtrace: [ 59.103507][ T6876] CPU: 1 PID: 6876 Comm: syz-executor633 Not tainted 5.9.0-rc6-syzkaller #0 [ 59.112230][ T6876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.122270][ T6876] Call Trace: [ 59.125602][ T6876] dump_stack+0x198/0x1fd [ 59.129918][ T6876] bond_ipsec_add_sa+0x1dc/0x240 [ 59.134845][ T6876] xfrm_dev_state_add+0x2da/0x7b0 [ 59.139851][ T6876] xfrm_add_sa+0x2166/0x34f0 [ 59.144425][ T6876] ? xfrm_send_policy_notify+0x17a0/0x17a0 [ 59.150222][ T6876] ? bpf_lsm_capable+0x5/0x10 [ 59.154873][ T6876] ? security_capable+0x8f/0xc0 [ 59.159703][ T6876] ? __nla_parse+0x3d/0x4a [ 59.164098][ T6876] ? xfrm_send_policy_notify+0x17a0/0x17a0 [ 59.169885][ T6876] xfrm_user_rcv_msg+0x41e/0x720 [ 59.174799][ T6876] ? xfrm_do_migrate+0x800/0x800 [ 59.179723][ T6876] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 59.185692][ T6876] ? kfree_skbmem+0xef/0x1b0 [ 59.190259][ T6876] ? lock_is_held_type+0xbb/0xf0 [ 59.195183][ T6876] ? find_held_lock+0x2d/0x110 [ 59.199971][ T6876] ? __mutex_lock+0x626/0x10e0 [ 59.204728][ T6876] netlink_rcv_skb+0x15a/0x430 [ 59.209482][ T6876] ? xfrm_do_migrate+0x800/0x800 [ 59.214414][ T6876] ? netlink_ack+0xa10/0xa10 [ 59.219038][ T6876] xfrm_netlink_rcv+0x6b/0x90 [ 59.223710][ T6876] netlink_unicast+0x533/0x7d0 [ 59.228481][ T6876] ? netlink_attachskb+0x810/0x810 [ 59.233598][ T6876] ? __phys_addr_symbol+0x2c/0x70 [ 59.238615][ T6876] ? __check_object_size+0x171/0x3e4 [ 59.243898][ T6876] netlink_sendmsg+0x856/0xd90 [ 59.248661][ T6876] ? netlink_unicast+0x7d0/0x7d0 [ 59.253581][ T6876] ? bpf_lsm_socket_sendmsg+0x5/0x10 [ 59.258854][ T6876] ? netlink_unicast+0x7d0/0x7d0 [ 59.263780][ T6876] sock_sendmsg+0xcf/0x120 [ 59.268175][ T6876] ____sys_sendmsg+0x6e8/0x810 [ 59.272917][ T6876] ? kernel_sendmsg+0x50/0x50 [ 59.277583][ T6876] ? do_recvmmsg+0x6d0/0x6d0 [ 59.282164][ T6876] ? lock_is_held_type+0xbb/0xf0 [ 59.287090][ T6876] ? find_held_lock+0x2d/0x110 [ 59.291838][ T6876] ___sys_sendmsg+0xf3/0x170 [ 59.296471][ T6876] ? sendmsg_copy_msghdr+0x160/0x160 [ 59.301744][ T6876] ? check_preemption_disabled+0x50/0x130 [ 59.307459][ T6876] ? do_huge_pmd_anonymous_page+0x1c22/0x2200 [ 59.313510][ T6876] ? do_huge_pmd_anonymous_page+0x8f2/0x2200 [ 59.319513][ T6876] ? handle_mm_fault+0xb78/0x4690 [ 59.324552][ T6876] ? lock_is_held_type+0xbb/0xf0 [ 59.329471][ T6876] ? find_held_lock+0x2d/0x110 [ 59.334223][ T6876] ? __fget_light+0x215/0x280 [ 59.338896][ T6876] __sys_sendmsg+0xe5/0x1b0 [ 59.343391][ T6876] ? __sys_sendmsg_sock+0xb0/0xb0 [ 59.348403][ T6876] ? check_preemption_disabled+0x50/0x130 [ 59.354101][ T6876] ? syscall_enter_from_user_mode+0x1d/0x60 [ 59.359997][ T6876] do_syscall_64+0x2d/0x70 [ 59.364425][ T6876] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.370297][ T6876] RIP: 0033:0x443b69 [ 59.374168][ T6876] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 cb 0b fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.393749][ T6876] RSP: 002b:00007fffec5a5f88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 59.402148][ T6876] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443b69 [ 59.410105][ T6876] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 59.418066][ T6876] RBP: 00007fffec5a5fa0 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 59.426025][ T6876] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffec5a5fd0 [ 59.433976][ T6876] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 59.448879][ T6876] bond0: (slave bond_slave_0): Slave does not support ipsec offload