Description of problem:
Testing systemd-networkd on rawhide with 3.13.7-200.fc20.x86_64. Bond devices did not make the kernel happy. I'll test in a moment with a fresher kernel.

Additional info:
reporter:       libreport-2.2.0
BUG: soft lockup - CPU#7 stuck for 22s! [systemd-network:2902]
Modules linked in: bonding ipt_MASQUERADE xt_CHECKSUM tun fuse xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw bnep iTCO_wdt iTCO_vendor_support snd_hda_codec_hdmi snd_hda_codec_realtek vfat fat x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel microcode i2c_i801 uvcvideo xpad videobuf2_vmalloc snd_usb_audio btusb snd_hda_intel videobuf2_memops videobuf2_core snd_hda_codec snd_usbmidi_lib bluetooth videodev snd_rawmidi snd_hwdep snd_seq media rfkill snd_seq_device joydev snd_pcm snd_page_alloc snd_timer snd lpc_ich soundcore mfd_core e1000e tpm_tis shpchp mei_me tpm ptp mei pps_core nfsd auth_rpcgss nfs_acl lockd sunrpc btrfs libcrc32c xor raid6_pq nouveau i915 mxm_wmi wmi ttm i2c_algo_bit drm_kms_helper firewire_ohci drm firewire_core hid_logitech_dj crc_itu_t i2c_core video
CPU: 7 PID: 2902 Comm: systemd-network Not tainted 3.13.7-200.fc20.x86_64 #1
Hardware name:                  /DQ77MK, BIOS MKQ7710H.86A.0064.2013.1003.1058 10/03/2013
task: ffff8807918519e0 ti: ffff8800874fe000 task.ti: ffff8800874fe000
RIP: 0010:[<ffffffff8168e14d>]  [<ffffffff8168e14d>] _raw_spin_lock+0x2d/0x40
RSP: 0018:ffff8800874ff950  EFLAGS: 00000297
RAX: 0000000000000003 RBX: 0000000000000001 RCX: 0000000000000004
RDX: 0000000000000004 RSI: ffff88077972f000 RDI: ffff88077972f23c
RBP: ffff8800874ff950 R08: 0000000000017280 R09: ffff88082e3d7280
R10: ffffea00200d8f80 R11: ffffffffa04b6389 R12: 00000000fffffff0
R13: 00000000fffffff1 R14: 000000002dc317af R15: 0000000000000000
FS:  00007ff4e16038c0(0000) GS:ffff88082e3c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff4e1629000 CR3: 0000000779720000 CR4: 00000000001407e0
Stack:
 ffff8800874ff978 ffffffff8158c606 ffff8800874ff978 ffff88077972f000
 ffff8807e31c6cba ffff8800874ff9e8 ffffffffa083c2c1 ffffffff00000041
 ffff88077972f880 0000000000000000 0000000100000000 d2443ef240e80001
Call Trace:
 [<ffffffff8158c606>] dev_mc_sync_multiple+0x36/0x80
 [<ffffffffa083c2c1>] bond_enslave+0x3e1/0xe70 [bonding]
 [<ffffffff81595869>] do_setlink+0x979/0x9e0
 [<ffffffff8115386a>] ? __alloc_pages_nodemask+0x16a/0xa80
 [<ffffffff8133b7e6>] ? nla_parse+0x96/0xe0
 [<ffffffff81595991>] rtnl_setlink+0xc1/0x130
 [<ffffffff812ae7e8>] ? security_capable+0x18/0x20
 [<ffffffff81592fb9>] rtnetlink_rcv_msg+0x99/0x260
 [<ffffffff812b1660>] ? sock_has_perm+0x70/0x90
 [<ffffffff81575402>] ? skb_clone+0x72/0xb0
 [<ffffffff81592f20>] ? rtnetlink_rcv+0x30/0x30
 [<ffffffff815b2109>] netlink_rcv_skb+0xa9/0xc0
 [<ffffffff81592f18>] rtnetlink_rcv+0x28/0x30
 [<ffffffff815b1735>] netlink_unicast+0xd5/0x1b0
 [<ffffffff815b1b0f>] netlink_sendmsg+0x2ff/0x740
 [<ffffffff8156be9b>] sock_sendmsg+0x8b/0xc0
 [<ffffffff811710d5>] ? tlb_finish_mmu+0x55/0x60
 [<ffffffff811790c3>] ? unmap_region+0xd3/0x110
 [<ffffffff8156c041>] SYSC_sendto+0x121/0x1c0
 [<ffffffff8117b517>] ? do_munmap+0x297/0x3b0
 [<ffffffff8156cb4e>] SyS_sendto+0xe/0x10
 [<ffffffff816966e9>] system_call_fastpath+0x16/0x1b
Code: 44 00 00 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 0f b7 07 <66> 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f