[ OK ] Started OpenBSD Secure Shell server. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. 2020/08/10 18:47:57 parsed 1 programs 2020/08/10 18:47:57 executed programs: 0 syzkaller login: [ 37.066859] audit: type=1400 audit(1597085277.281:8): avc: denied { execmem } for pid=6357 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 37.095032] IPVS: ftp: loaded support on port[0] = 21 [ 37.177061] chnl_net:caif_netlink_parms(): no params data found [ 37.256324] bridge0: port 1(bridge_slave_0) entered blocking state [ 37.263138] bridge0: port 1(bridge_slave_0) entered disabled state [ 37.270919] device bridge_slave_0 entered promiscuous mode [ 37.279233] bridge0: port 2(bridge_slave_1) entered blocking state [ 37.286085] bridge0: port 2(bridge_slave_1) entered disabled state [ 37.292958] device bridge_slave_1 entered promiscuous mode [ 37.309854] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 37.318716] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 37.337098] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 37.344512] team0: Port device team_slave_0 added [ 37.350816] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 37.358478] team0: Port device team_slave_1 added [ 37.373394] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 37.379745] 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. [ 37.405896] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 37.417193] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 37.423411] 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. [ 37.449543] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 37.460919] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 37.469397] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 37.487705] device hsr_slave_0 entered promiscuous mode [ 37.493273] device hsr_slave_1 entered promiscuous mode [ 37.500109] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 37.507728] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 37.571970] bridge0: port 2(bridge_slave_1) entered blocking state [ 37.578452] bridge0: port 2(bridge_slave_1) entered forwarding state [ 37.585534] bridge0: port 1(bridge_slave_0) entered blocking state [ 37.591908] bridge0: port 1(bridge_slave_0) entered forwarding state [ 37.620785] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 37.627635] 8021q: adding VLAN 0 to HW filter on device bond0 [ 37.636580] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 37.644674] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 37.653553] bridge0: port 1(bridge_slave_0) entered disabled state [ 37.661569] bridge0: port 2(bridge_slave_1) entered disabled state [ 37.671243] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 37.678095] 8021q: adding VLAN 0 to HW filter on device team0 [ 37.686957] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 37.694518] bridge0: port 1(bridge_slave_0) entered blocking state [ 37.700920] bridge0: port 1(bridge_slave_0) entered forwarding state [ 37.711576] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 37.719460] bridge0: port 2(bridge_slave_1) entered blocking state [ 37.725850] bridge0: port 2(bridge_slave_1) entered forwarding state [ 37.740495] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 37.748399] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 37.758618] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 37.770805] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 37.781584] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 37.792995] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 37.799667] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 37.807857] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 37.815900] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 37.827901] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 37.835402] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 37.842071] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 37.852877] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 37.906845] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 37.917140] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 37.950287] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 37.958034] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 37.964517] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 37.974237] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 37.982123] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 37.989130] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 37.998462] device veth0_vlan entered promiscuous mode [ 38.008642] device veth1_vlan entered promiscuous mode [ 38.014472] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 38.023399] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 38.034458] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 38.044169] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 38.052232] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 38.059839] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 38.070115] device veth0_macvtap entered promiscuous mode [ 38.076693] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 38.084532] device veth1_macvtap entered promiscuous mode [ 38.093603] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 38.102816] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 38.112441] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 38.119493] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 38.138774] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 38.148413] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 38.156381] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 38.163489] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 40.475027] BUG: spinlock recursion on CPU#0, syz-executor.0/6766 [ 40.481298] lock: 0xffff888097e80de8, .magic: dead4ead, .owner: syz-executor.0/6766, .owner_cpu: 0 [ 40.490531] CPU: 0 PID: 6766 Comm: syz-executor.0 Not tainted 4.14.193-syzkaller #0 [ 40.498328] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.507668] Call Trace: [ 40.510258] dump_stack+0x1b2/0x283 [ 40.513883] do_raw_spin_lock+0x1a2/0x200 [ 40.518012] dev_mc_sync+0x10b/0x1c0 [ 40.521732] ? vlan_dev_set_mac_address+0x5c0/0x5c0 [ 40.526757] vlan_dev_set_rx_mode+0x38/0x80 [ 40.531090] __dev_set_rx_mode+0x191/0x2a0 [ 40.535332] dev_uc_unsync+0x16c/0x1c0 [ 40.539227] bond_enslave+0x2014/0x4b00 [ 40.543208] ? bond_update_slave_arr+0x670/0x670 [ 40.547948] ? nlmsg_notify+0x126/0x170 [ 40.551907] ? rtmsg_ifinfo+0xd4/0x100 [ 40.555772] ? __dev_notify_flags+0x12b/0x260 [ 40.560244] ? dev_change_name+0x6a0/0x6a0 [ 40.564457] ? bond_update_slave_arr+0x670/0x670 [ 40.569210] do_set_master+0x19e/0x200 [ 40.573086] rtnl_newlink+0x134c/0x1830 [ 40.577040] ? __lock_acquire+0x5fc/0x3f20 [ 40.581255] ? kmem_cache_free+0x7c/0x2b0 [ 40.585380] ? rtnl_dellink+0x6a0/0x6a0 [ 40.589334] ? trace_hardirqs_on+0x10/0x10 [ 40.593545] ? lock_acquire+0x170/0x3f0 [ 40.597505] ? lock_acquire+0x170/0x3f0 [ 40.601470] ? lock_downgrade+0x740/0x740 [ 40.605608] ? rtnl_dellink+0x6a0/0x6a0 [ 40.609558] rtnetlink_rcv_msg+0x3be/0xb10 [ 40.613792] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 40.618356] ? do_raw_spin_unlock+0x164/0x220 [ 40.622848] ? netdev_pick_tx+0x2e0/0x2e0 [ 40.626977] netlink_rcv_skb+0x125/0x390 [ 40.631018] ? memcpy+0x35/0x50 [ 40.634290] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 40.638766] ? netlink_ack+0x9a0/0x9a0 [ 40.642652] netlink_unicast+0x437/0x610 [ 40.646698] ? netlink_sendskb+0xd0/0xd0 [ 40.650833] netlink_sendmsg+0x62e/0xb80 [ 40.654893] ? nlmsg_notify+0x170/0x170 [ 40.658861] ? kernel_recvmsg+0x210/0x210 [ 40.662987] ? security_socket_sendmsg+0x83/0xb0 [ 40.667719] ? nlmsg_notify+0x170/0x170 [ 40.671670] sock_sendmsg+0xb5/0x100 [ 40.675364] ___sys_sendmsg+0x6c8/0x800 [ 40.679318] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 40.684067] ? __lock_acquire+0x5fc/0x3f20 [ 40.688291] ? do_futex+0x12b/0x1930 [ 40.691996] ? trace_hardirqs_on+0x10/0x10 [ 40.696213] ? __fget+0x1fe/0x360 [ 40.699654] ? lock_acquire+0x170/0x3f0 [ 40.703615] ? lock_downgrade+0x740/0x740 [ 40.707756] ? __fget+0x225/0x360 [ 40.711208] ? __fdget+0x196/0x1f0 [ 40.714755] ? sockfd_lookup_light+0xb2/0x160 [ 40.719246] __sys_sendmsg+0xa3/0x120 [ 40.723030] ? SyS_shutdown+0x160/0x160 [ 40.726982] ? SyS_clock_gettime+0xf5/0x180 [ 40.731289] ? SyS_clock_settime+0x1a0/0x1a0 [ 40.735671] SyS_sendmsg+0x27/0x40 [ 40.739184] ? __sys_sendmsg+0x120/0x120 [ 40.743350] do_syscall_64+0x1d5/0x640 [ 40.747237] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 40.752401] RIP: 0033:0x45ce69 [ 40.755569] RSP: 002b:00007f9c14865c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 40.763267] RAX: ffffffffffffffda RBX: 000000000002c0c0 RCX: 000000000045ce69 [ 40.770514] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 000000000000000d [ 40.777764] RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 [ 40.785011] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c [ 40.792260] R13: 00007ffcde39d5df R14: 00007f9c148669c0 R15: 000000000118bf2c [ 41.353612] Bluetooth: hci0 command 0x0409 tx timeout [ 43.433072] Bluetooth: hci0 command 0x041b tx timeout [ 45.501687] Bluetooth: hci0 command 0x040f tx timeout [ 47.581066] Bluetooth: hci0 command 0x0419 tx timeout