[ 55.072975] audit: type=1400 audit(1580650457.436:36): avc: denied { create } for pid=7775 comm="syz-fuzzer" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 Warning: Permanently added '10.128.10.53' (ECDSA) to the list of known hosts. 2020/02/02 13:34:24 parsed 1 programs 2020/02/02 13:34:25 executed programs: 0 [ 62.802707] IPv6: ADDRCONF(NETDEV_CHANGE): nr2: link becomes ready [ 62.810805] IPv6: ADDRCONF(NETDEV_CHANGE): nr1: link becomes ready [ 62.823765] IPv6: ADDRCONF(NETDEV_CHANGE): nr5: link becomes ready [ 62.832906] IPv6: ADDRCONF(NETDEV_CHANGE): nr0: link becomes ready [ 62.842042] IPv6: ADDRCONF(NETDEV_CHANGE): nr3: link becomes ready [ 62.850554] IPv6: ADDRCONF(NETDEV_CHANGE): nr4: link becomes ready [ 62.869857] IPVS: Creating netns size=2712 id=2 [ 62.874750] IPVS: ftp: loaded support on port[0] = 21 [ 62.951751] IPVS: Creating netns size=2712 id=3 [ 62.956664] IPVS: ftp: loaded support on port[0] = 21 [ 63.094804] chnl_net:caif_netlink_parms(): no params data found [ 63.122253] IPVS: Creating netns size=2712 id=4 [ 63.127196] IPVS: ftp: loaded support on port[0] = 21 [ 63.326761] IPVS: Creating netns size=2712 id=5 [ 63.332378] IPVS: ftp: loaded support on port[0] = 21 [ 63.435266] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.441824] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.451454] device bridge_slave_0 entered promiscuous mode [ 63.460036] chnl_net:caif_netlink_parms(): no params data found [ 63.490864] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.498067] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.507469] device bridge_slave_1 entered promiscuous mode [ 63.610861] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 63.617199] IPVS: Creating netns size=2712 id=6 [ 63.617328] IPVS: ftp: loaded support on port[0] = 21 [ 63.675460] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 63.955508] IPVS: Creating netns size=2712 id=7 [ 63.960392] IPVS: ftp: loaded support on port[0] = 21 [ 64.023265] batman_adv: Unable to register the batman interface 'batadv0': -12 [ 64.031189] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.037930] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.047303] device bridge_slave_0 entered promiscuous mode [ 64.116544] chnl_net:caif_netlink_parms(): no params data found [ 64.139121] batman_adv: Unable to register the batman interface 'batadv0': -12 [ 64.147454] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.154176] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.163606] device bridge_slave_1 entered promiscuous mode [ 64.189235] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 64.276457] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 64.289085] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 64.327961] chnl_net:caif_netlink_parms(): no params data found [ 64.366713] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 64.594933] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 64.648774] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 64.697795] chnl_net:caif_netlink_parms(): no params data found [ 64.847974] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.855862] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.865160] device bridge_slave_0 entered promiscuous mode [ 64.873508] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.887240] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.899246] device bridge_slave_1 entered promiscuous mode [ 65.067190] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 65.074671] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.081341] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.090324] device bridge_slave_0 entered promiscuous mode [ 65.130149] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 65.138661] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.149159] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.158303] device bridge_slave_1 entered promiscuous mode [ 65.167896] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 65.235487] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.385422] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 65.437340] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.443775] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.456432] device bridge_slave_0 entered promiscuous mode [ 65.463607] chnl_net:caif_netlink_parms(): no params data found [ 65.479734] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 65.489780] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.513677] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.521033] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.532845] device bridge_slave_1 entered promiscuous mode [ 65.540237] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 65.790864] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 65.859434] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.910852] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 65.991731] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.177924] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 66.233791] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.240577] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.249524] device bridge_slave_0 entered promiscuous mode [ 66.257873] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.308629] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.315725] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.325243] device bridge_slave_1 entered promiscuous mode [ 66.375079] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 66.394121] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 66.425616] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 66.434577] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.442782] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 66.456171] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 66.509769] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 66.519845] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 66.563822] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 66.738342] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 66.746778] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 66.820044] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 66.963410] ------------[ cut here ]------------ [ 66.968264] WARNING: CPU: 1 PID: 7874 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x7b/0xa0 [ 66.976147] sysfs: cannot create duplicate filename '/class/macvtap/tap50' [ 66.983166] Kernel panic - not syncing: panic_on_warn set ... [ 66.983166] [ 66.990545] CPU: 1 PID: 7874 Comm: syz-executor.5 Not tainted 4.6.0-syzkaller #0 [ 66.998060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.007443] 1ffffffff0d95756 ffff8800b5296fb0 ffffffff82c74fc6 ffffffff85c81040 [ 67.015546] ffff8800b5297088 ffffffff85d2bac0 ffffffff81922ccb ffff8800b5297078 [ 67.023581] ffffffff8160cf4e 0000000041b58ab3 ffffffff868f2161 ffffffff8160cd9f [ 67.031594] Call Trace: [ 67.034166] [] dump_stack+0xe6/0x120 [ 67.039514] [] ? sysfs_warn_dup+0x7b/0xa0 [ 67.045295] [] panic+0x1af/0x348 [ 67.050296] [] ? set_ti_thread_flag+0xf/0xf [ 67.056278] [] ? sysfs_warn_dup+0x7b/0xa0 [ 67.062058] [] __warn+0x18d/0x1b0 [ 67.067233] [] warn_slowpath_fmt+0x92/0xb0 [ 67.073116] [] ? __warn+0x1b0/0x1b0 [ 67.078419] [] ? kernfs_path_from_node+0x4a/0x60 [ 67.084812] [] sysfs_warn_dup+0x7b/0xa0 [ 67.090514] [] sysfs_do_create_link_sd.isra.2+0xd1/0xf0 [ 67.097514] [] sysfs_create_link+0x43/0xb0 [ 67.103393] [] device_add+0x689/0x1360 [ 67.108928] [] ? kfree_const+0x1d/0x20 [ 67.114447] [] ? device_private_init+0x180/0x180 [ 67.120834] [] ? kfree_const+0x1d/0x20 [ 67.126355] [] ? kobject_set_name_vargs+0xb4/0x130 [ 67.132964] [] device_create_groups_vargs+0x1c8/0x220 [ 67.139778] [] device_create+0x88/0xa0 [ 67.145312] [] ? device_create_vargs+0x20/0x20 [ 67.151569] [] ? macvlan_set_mac_address+0x150/0x150 [ 67.158311] [] macvtap_device_event+0x1c4/0x2a0 [ 67.164679] [] notifier_call_chain+0x8b/0x170 [ 67.170811] [] raw_notifier_call_chain+0x11/0x20 [ 67.177200] [] call_netdevice_notifiers_info+0x47/0x80 [ 67.184108] [] register_netdevice+0x88a/0xce0 [ 67.190518] [] ? netdev_change_features+0x80/0x80 [ 67.197004] [] ? dev_get_nest_level+0x10c/0x1a0 [ 67.203304] [] macvlan_common_newlink+0x8b9/0x1090 [ 67.209865] [] macvtap_newlink+0xbf/0x110 [ 67.215649] [] ? __netlink_ns_capable+0xc7/0xf0 [ 67.221978] [] rtnl_newlink+0xd4b/0x1230 [ 67.227675] [] ? rtnl_link_ops_get+0x5d/0x90 [ 67.233843] [] ? rtnl_newlink+0x319/0x1230 [ 67.239729] [] ? rtnl_setlink+0x2f0/0x2f0 [ 67.245506] [] ? avc_has_perm_noaudit+0x232/0x3f0 [ 67.252140] [] ? avc_has_perm_noaudit+0x24f/0x3f0 [ 67.258620] [] ? avc_has_perm_noaudit+0x8c/0x3f0 [ 67.265125] [] ? print_context_stack+0x7b/0xc0 [ 67.271345] [] ? cred_has_capability+0x112/0x220 [ 67.277734] [] ? __netlink_ns_capable+0xc7/0xf0 [ 67.284082] [] rtnetlink_rcv_msg+0x222/0x680 [ 67.291380] [] ? trace_hardirqs_on_caller+0x44c/0x5e0 [ 67.298366] [] ? rtnetlink_rcv+0x30/0x30 [ 67.304108] [] ? mutex_lock_nested+0x638/0xb30 [ 67.310318] [] ? rtnetlink_rcv+0x16/0x30 [ 67.316007] [] ? netlink_lookup+0xd4/0x630 [ 67.321882] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 67.328615] [] netlink_rcv_skb+0x242/0x350 [ 67.334477] [] ? rtnetlink_rcv+0x30/0x30 [ 67.340254] [] rtnetlink_rcv+0x25/0x30 [ 67.345774] [] netlink_unicast+0x455/0x660 [ 67.351641] [] ? netlink_unicast+0x3b5/0x660 [ 67.357680] [] ? netlink_attachskb+0x730/0x730 [ 67.363897] [] netlink_sendmsg+0x893/0xb40 [ 67.369768] [] ? netlink_unicast+0x660/0x660 [ 67.375802] [] ? selinux_socket_sendmsg+0x3a/0x50 [ 67.382276] [] ? security_socket_sendmsg+0x6a/0xa0 [ 67.388994] [] ? netlink_unicast+0x660/0x660 [ 67.395038] [] sock_sendmsg+0xb5/0xf0 [ 67.400511] [] SYSC_sendto+0x1c9/0x300 [ 67.406031] [] ? SYSC_connect+0x2a0/0x2a0 [ 67.411985] [] ? mntput_no_expire+0xb1/0x600 [ 67.418089] [] ? mntput_no_expire+0xce/0x600 [ 67.424149] [] ? mnt_get_count+0x1c0/0x1c0 [ 67.430013] [] ? mntput+0x52/0x70 [ 67.435123] [] ? ___might_sleep+0x331/0x440 [ 67.441076] [] ? trace_hardirqs_on_caller+0x44c/0x5e0 [ 67.447905] [] ? trace_hardirqs_on_thunk+0x1b/0x1d [ 67.454477] [] SyS_sendto+0x9/0x10 [ 67.459736] [] entry_SYSCALL_64_fastpath+0x23/0xc1 [ 67.468114] Kernel Offset: disabled