[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. syzkaller login: [ 33.967553] audit: type=1400 audit(1588054293.811:8): avc: denied { execmem } for pid=6320 comm="syz-executor578" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 34.236398] IPVS: ftp: loaded support on port[0] = 21 [ 35.026647] chnl_net:caif_netlink_parms(): no params data found [ 35.112328] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.120012] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.128046] device bridge_slave_0 entered promiscuous mode [ 35.136646] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.143036] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.150711] device bridge_slave_1 entered promiscuous mode [ 35.167866] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 35.176829] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 35.195568] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 35.202772] team0: Port device team_slave_0 added [ 35.209162] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 35.216944] team0: Port device team_slave_1 added [ 35.232864] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 35.239190] 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. [ 35.265555] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 35.277518] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 35.283784] 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. [ 35.309677] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 35.320694] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 35.329034] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 35.386925] device hsr_slave_0 entered promiscuous mode [ 35.424698] device hsr_slave_1 entered promiscuous mode [ 35.465007] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 35.472230] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 35.537918] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.544500] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.551255] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.557772] bridge0: port 1(bridge_slave_0) entered forwarding state [ 35.588111] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 35.595423] 8021q: adding VLAN 0 to HW filter on device bond0 [ 35.603271] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 35.612907] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 35.632259] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.641229] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.653333] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 35.660086] 8021q: adding VLAN 0 to HW filter on device team0 [ 35.668705] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 35.676539] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.682906] bridge0: port 1(bridge_slave_0) entered forwarding state [ 35.692112] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 35.700625] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.707017] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.725115] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 35.732715] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 35.740506] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 35.749245] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 35.758301] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 35.767782] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 35.773792] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 35.787816] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 35.796295] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 35.802991] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 35.813620] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 35.866437] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 35.876551] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 35.908408] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 35.916408] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 35.922862] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 35.933155] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 35.941015] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 35.948411] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 35.957590] device veth0_vlan entered promiscuous mode [ 35.966724] device veth1_vlan entered promiscuous mode [ 35.972523] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 35.982398] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 35.993348] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 36.003471] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 36.011204] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 36.019252] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 36.027194] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 36.037886] device veth0_macvtap entered promiscuous mode [ 36.046742] device veth1_macvtap entered promiscuous mode [ 36.056700] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 36.066462] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 36.077044] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 36.084451] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 36.091179] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 36.099774] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 36.110234] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 36.117258] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 36.125711] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 36.133422] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.760730] device bridge0 entered promiscuous mode [ 36.767648] bond0: Enslaving macvlan2 as an active interface with an up link executing program [ 36.879819] device bond0 entered promiscuous mode [ 36.884757] device bond_slave_0 entered promiscuous mode [ 36.890442] device bond_slave_1 entered promiscuous mode [ 36.897098] device macvlan2 entered promiscuous mode [ 36.902797] 8021q: adding VLAN 0 to HW filter on device macvlan3 [ 36.953324] BUG: spinlock recursion on CPU#0, syz-executor578/6576 [ 36.959785] lock: 0xffff888098690ce8, .magic: dead4ead, .owner: syz-executor578/6576, .owner_cpu: 0 [ 36.969079] CPU: 0 PID: 6576 Comm: syz-executor578 Not tainted 4.14.177-syzkaller #0 [ 36.976986] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.986321] Call Trace: [ 36.988893] dump_stack+0x13e/0x194 [ 36.992528] do_raw_spin_lock+0x1cd/0x230 [ 36.996662] dev_uc_sync+0x10b/0x1c0 [ 37.000370] macvlan_set_mac_lists+0x55/0x110 [ 37.004877] ? macvlan_compute_filter+0x2c0/0x2c0 [ 37.009878] __dev_set_rx_mode+0x191/0x2a0 [ 37.014087] dev_uc_unsync+0x16c/0x1c0 [ 37.017949] bond_hw_addr_flush+0x5c/0xe0 [ 37.022074] ? bond_set_dev_addr.isra.0+0xb0/0xb0 [ 37.026893] bond_enslave+0x1e53/0x49e0 [ 37.030865] ? bond_update_slave_arr+0x6c0/0x6c0 [ 37.035622] ? rtmsg_ifinfo_event.part.0+0x9a/0xc0 [ 37.040540] ? rtmsg_ifinfo+0x64/0x80 [ 37.044318] ? __dev_notify_flags+0x110/0x210 [ 37.048895] ? dev_change_name+0x990/0x990 [ 37.053107] ? linkwatch_fire_event+0x3a/0x1a0 [ 37.057757] ? bond_update_slave_arr+0x6c0/0x6c0 [ 37.062514] do_set_master+0x19e/0x200 [ 37.066382] rtnl_newlink+0x1319/0x1720 [ 37.070337] ? trace_hardirqs_on+0x10/0x10 [ 37.074548] ? rtnl_link_unregister+0x1f0/0x1f0 [ 37.079226] ? lock_acquire+0x170/0x3f0 [ 37.083207] ? lock_acquire+0x170/0x3f0 [ 37.087285] ? rtnetlink_rcv_msg+0x31d/0xb10 [ 37.091680] ? __lock_is_held+0xad/0x140 [ 37.095719] ? lock_downgrade+0x6e0/0x6e0 [ 37.099843] ? rtnl_link_unregister+0x1f0/0x1f0 [ 37.104655] rtnetlink_rcv_msg+0x3be/0xb10 [ 37.108872] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 37.113452] ? netdev_pick_tx+0x2e0/0x2e0 [ 37.117573] ? skb_clone+0x11c/0x310 [ 37.121268] ? save_trace+0x290/0x290 [ 37.125045] netlink_rcv_skb+0x127/0x370 [ 37.129085] ? rtnl_bridge_getlink+0x7a0/0x7a0 [ 37.133640] ? netlink_ack+0x980/0x980 [ 37.137502] netlink_unicast+0x437/0x620 [ 37.142409] ? netlink_attachskb+0x600/0x600 [ 37.146791] netlink_sendmsg+0x733/0xbe0 [ 37.150841] ? netlink_unicast+0x620/0x620 [ 37.155067] ? SYSC_sendto+0x2b0/0x2b0 [ 37.158931] ? security_socket_sendmsg+0x83/0xb0 [ 37.163662] ? netlink_unicast+0x620/0x620 [ 37.167890] sock_sendmsg+0xc5/0x100 [ 37.171579] ___sys_sendmsg+0x70a/0x840 [ 37.175529] ? copy_msghdr_from_user+0x380/0x380 [ 37.180258] ? trace_hardirqs_on+0x10/0x10 [ 37.184484] ? save_trace+0x290/0x290 [ 37.188286] ? find_held_lock+0x2d/0x110 [ 37.192331] ? __might_fault+0x104/0x1b0 [ 37.196388] ? lock_acquire+0x170/0x3f0 [ 37.200350] ? lock_downgrade+0x6e0/0x6e0 [ 37.204493] ? __might_fault+0x177/0x1b0 [ 37.208534] ? _copy_to_user+0x82/0xd0 [ 37.212413] ? __fget_light+0x16a/0x1f0 [ 37.216362] ? sockfd_lookup_light+0xb2/0x160 [ 37.220835] __sys_sendmsg+0xa3/0x120 [ 37.224610] ? SyS_shutdown+0x160/0x160 [ 37.228561] ? move_addr_to_kernel+0x60/0x60 [ 37.233030] SyS_sendmsg+0x27/0x40 [ 37.236560] ? __sys_sendmsg+0x120/0x120 [ 37.240595] do_syscall_64+0x1d5/0x640 [ 37.244463] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 37.249652] RIP: 0033:0x444009 [ 37.252840] RSP: 002b:00007ffd13546f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 37.260571] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000444009 [ 37.267824] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004 [ 37.275083] RBP: 00007ffd13546fa0 R08: 0000000000000000 R09: 0000000000000000 [ 37.282370] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000008fe9 [ 37.289646] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 45.238772] NOHZ: local_softirq_pending 08