Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. syzkaller login: [ 32.945796] audit: type=1400 audit(1594274927.275:8): avc: denied { execmem } for pid=6326 comm="syz-executor455" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 33.209661] IPVS: ftp: loaded support on port[0] = 21 [ 34.022832] chnl_net:caif_netlink_parms(): no params data found [ 34.116498] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.123238] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.131087] device bridge_slave_0 entered promiscuous mode [ 34.138149] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.145738] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.152934] device bridge_slave_1 entered promiscuous mode [ 34.169425] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 34.178132] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 34.196227] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 34.203792] team0: Port device team_slave_0 added [ 34.209790] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 34.216836] team0: Port device team_slave_1 added [ 34.231933] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 34.238445] 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. [ 34.263660] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 34.275510] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 34.281811] 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. [ 34.307171] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 34.318000] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 34.325701] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 34.380946] device hsr_slave_0 entered promiscuous mode [ 34.428642] device hsr_slave_1 entered promiscuous mode [ 34.468761] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 34.475863] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 34.537793] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.544280] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.551185] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.557519] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.588109] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 34.594190] 8021q: adding VLAN 0 to HW filter on device bond0 [ 34.603862] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 34.612719] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 34.621116] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.638399] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.648835] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 34.654904] 8021q: adding VLAN 0 to HW filter on device team0 [ 34.663627] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 34.671653] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.678053] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.687000] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 34.695481] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.701869] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.719659] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 34.727306] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 34.735722] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 34.743496] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 34.753469] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 34.762881] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 34.769007] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 34.783592] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 34.791445] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 34.798566] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 34.808934] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 34.860464] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 34.871599] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 34.902634] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 34.909647] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 34.916048] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 34.925595] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 34.933532] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 34.941715] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 34.951194] device veth0_vlan entered promiscuous mode [ 34.960452] device veth1_vlan entered promiscuous mode [ 34.966327] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 34.975833] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 34.987536] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 34.997648] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 35.005525] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 35.013467] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 35.021892] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 35.030826] device veth0_macvtap entered promiscuous mode [ 35.039642] device veth1_macvtap entered promiscuous mode [ 35.048199] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 35.058247] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 35.067451] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 35.075690] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 35.082558] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 35.090605] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 35.101168] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 35.108440] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 35.115107] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 35.122928] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 35.238045] BUG: spinlock recursion on CPU#0, syz-executor455/6327 [ 35.244415] lock: 0xffff88809a9cca28, .magic: dead4ead, .owner: syz-executor455/6327, .owner_cpu: 0 [ 35.253707] CPU: 0 PID: 6327 Comm: syz-executor455 Not tainted 4.14.184-syzkaller #0 [ 35.261568] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.270906] Call Trace: [ 35.273633] dump_stack+0x1b2/0x283 [ 35.277276] do_raw_spin_lock+0x1cd/0x230 [ 35.281401] dev_mc_sync+0x10b/0x1c0 [ 35.285086] ? vlan_dev_set_mac_address+0x5c0/0x5c0 [ 35.290076] vlan_dev_set_rx_mode+0x38/0x80 [ 35.294369] __dev_set_rx_mode+0x191/0x2a0 [ 35.298577] dev_uc_unsync+0x16c/0x1c0 [ 35.302435] bond_hw_addr_flush+0x5c/0xe0 [ 35.306667] ? bond_do_fail_over_mac+0xd00/0xd00 [ 35.311421] bond_enslave+0x2811/0x49b0 [ 35.315494] ? bond_update_slave_arr+0x6c0/0x6c0 [ 35.320222] ? rtmsg_ifinfo_event.part.0+0x9a/0xc0 [ 35.325123] ? rtmsg_ifinfo+0x64/0x80 [ 35.328897] ? __dev_notify_flags+0x110/0x210 [ 35.333363] ? dev_change_name+0x970/0x970 [ 35.337590] ? bond_update_slave_arr+0x6c0/0x6c0 [ 35.342324] do_set_master+0x19e/0x200 [ 35.346356] rtnl_newlink+0x1319/0x1720 [ 35.350303] ? quarantine_put+0xc9/0x190 [ 35.354337] ? rtnl_link_unregister+0x1f0/0x1f0 [ 35.359024] ? avc_has_perm_noaudit+0x157/0x2a0 [ 35.363700] ? lock_acquire+0x170/0x3f0 [ 35.367682] ? lock_acquire+0x170/0x3f0 [ 35.371641] ? lock_acquire+0x170/0x3f0 [ 35.375587] ? lock_downgrade+0x6e0/0x6e0 [ 35.379723] ? rtnl_link_unregister+0x1f0/0x1f0 [ 35.384403] rtnetlink_rcv_msg+0x3be/0xb10 [ 35.388615] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 35.393082] ? netdev_pick_tx+0x2e0/0x2e0 [ 35.397202] ? do_raw_spin_unlock+0x164/0x250 [ 35.401672] netlink_rcv_skb+0x127/0x370 [ 35.405705] ? memcpy+0x35/0x50 [ 35.408976] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 35.413442] ? netlink_ack+0x970/0x970 [ 35.417301] netlink_unicast+0x437/0x610 [ 35.421337] ? netlink_sendskb+0x50/0x50 [ 35.425370] netlink_sendmsg+0x64a/0xbb0 [ 35.429416] ? nlmsg_notify+0x160/0x160 [ 35.433364] ? move_addr_to_kernel.part.0+0xf0/0xf0 [ 35.438352] ? security_socket_sendmsg+0x83/0xb0 [ 35.443082] ? nlmsg_notify+0x160/0x160 [ 35.447025] sock_sendmsg+0xb5/0x100 [ 35.450712] ___sys_sendmsg+0x70a/0x840 [ 35.454657] ? copy_msghdr_from_user+0x380/0x380 [ 35.459408] ? trace_hardirqs_on+0x10/0x10 [ 35.463614] ? trace_hardirqs_on+0x10/0x10 [ 35.467826] ? fs_reclaim_acquire+0x10/0x10 [ 35.472126] ? __might_fault+0x104/0x1b0 [ 35.476158] ? lock_acquire+0x170/0x3f0 [ 35.480102] ? lock_downgrade+0x6e0/0x6e0 [ 35.484218] ? __might_fault+0x177/0x1b0 [ 35.488252] ? _copy_to_user+0x82/0xd0 [ 35.492110] ? __fget_light+0x16a/0x1f0 [ 35.496056] ? sockfd_lookup_light+0xb2/0x160 [ 35.500522] __sys_sendmsg+0xa3/0x120 [ 35.504296] ? SyS_shutdown+0x160/0x160 [ 35.508262] ? move_addr_to_kernel+0x60/0x60 [ 35.512642] SyS_sendmsg+0x27/0x40 [ 35.516170] ? __sys_sendmsg+0x120/0x120 [ 35.520207] do_syscall_64+0x1d5/0x640 [ 35.524091] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 35.529252] RIP: 0033:0x443cb9 [ 35.532413] RSP: 002b:00007fff32dcec58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 35.540090] RAX: ffffffffffffffda RBX: 000000000000000d RCX: 0000000000443cb9 [ 35.547333] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000010 [ 35.554591] RBP: 0000000000fa7850 R08: 00000000bb1414ac R09: 00000000bb1414ac [ 35.561849] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000013 [ 35.569092] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000