I think this is ToT, probably mounting ext4 crypto on samus-cheets, 3.14 kernel:


[   59.308150] BUG: unable to handle kernel NULL pointer dereference at           (null)
[   59.308161] IP: [<          (null)>]           (null)
[   59.308167] PGD 0 
[   59.308172] Oops: 0010 [#1] PREEMPT SMP 
[   59.310472] gsmi: Log Shutdown Reason 0x03
[   59.310476] Modules linked in: uinput snd_soc_sst_bdw_rt5677_mach snd_soc_sst_haswell_pcm snd_soc_sst_dsp memc_x86 x86_pkg_temp_thermal rfcomm i2c_dev acpi_als industrialio_triggered_buffer snd_soc_rt5677 snd_hda_codec_hdmi snd_soc_rl6231 snd_soc_rt5677_spi snd_soc_sst_acpi snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat xt_mark bridge stp llc fuse zram iio_trig_sysfs ip6table_filter ip6_tables cros_ec_accel kfifo_buf industrialio snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device btusb btbcm btintel bluetooth uvcvideo videobuf2_vmalloc iwlmvm asix usbnet mii iwlwifi iwl7000_mac80211 cfg80211 joydev
[   59.310561] CPU: 1 PID: 1454 Comm: TaskSchedulerBa Not tainted 3.14.0 #4
[   59.310567] Hardware name: GOOGLE Samus, BIOS Google_Samus.6300.102.0 02/25/2015
[   59.310573] task: ffff88045a3576a0 ti: ffff880454c50000 task.ti: ffff880454c50000
[   59.310578] RIP: 0010:[<0000000000000000>]  [<          (null)>]           (null)
[   59.310585] RSP: 0018:ffff880454c51cc0  EFLAGS: 00010246
[   59.310590] RAX: ffffffff91424200 RBX: 0000000000000000 RCX: 0000000000000000
[   59.310596] RDX: 0000000000000000 RSI: ffff880454c51d90 RDI: ffff880078ab3000
[   59.310601] RBP: ffff880454c51d38 R08: 0000000000000000 R09: 0000000000000000
[   59.310606] R10: ffff880454c51c60 R11: 0000000000800001 R12: ffff880078ab3000
[   59.310612] R13: ffff88045a3576a0 R14: ffff880454c51d90 R15: ffff88045a3576a0
[   59.310618] FS:  00007707ce3d5700(0000) GS:ffff88047ec80000(0000) knlGS:0000000000000000
[   59.310624] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   59.310629] CR2: 0000000000000000 CR3: 00000000017fc000 CR4: 00000000003407e0
[   59.310634] Stack:
[   59.310637]  ffffffff90d5212f ffff88045a3576a0 ffff880466e52800 0000000000000000
[   59.310645]  ffff880454d4e3e0 ffff880078ab3000 ffff880454d4e3e0 ffff880078ab3000
[   59.310654]  0000000009ebe77a 0000000000000001 0000000000000000 ffff880454e48000
[   59.310663] Call Trace:
[   59.310670]  [<ffffffff90d5212f>] ? path_lookupat+0x19f/0x356
[   59.310676]  [<ffffffff90d5230e>] filename_lookup+0x28/0x7c
[   59.310682]  [<ffffffff90d55480>] user_path_at_empty+0xa0/0xfa
[   59.310689]  [<ffffffff90e1c1d7>] ? inode_has_perm+0x62/0x6b
[   59.310696]  [<ffffffff90cc819e>] ? from_kgid_munged+0x12/0x1e
[   59.310701]  [<ffffffff90d554eb>] user_path_at+0x11/0x13
[   59.310707]  [<ffffffff90d554eb>] ? user_path_at+0x11/0x13
[   59.310713]  [<ffffffff90d4bd98>] vfs_fstatat+0x5d/0xac
[   59.310719]  [<ffffffff90d4be02>] vfs_stat+0x1b/0x1d
[   59.310725]  [<ffffffff90d4be79>] SYSC_newstat+0x24/0x51
[   59.310731]  [<ffffffff90d4bff7>] SyS_newstat+0xe/0x10
[   59.310738]  [<ffffffff9122e3dc>] system_call_fastpath+0x20/0x25
[   59.310743] Code:  Bad RIP value.
[   59.310748] RIP  [<          (null)>]           (null)
[   59.310754]  RSP <ffff880454c51cc0>
[   59.310757] CR2: 0000000000000000
[   59.310761] ---[ end trace 7c76d3410d282b16 ]---
[   59.315099] Kernel panic - not syncing: Fatal exception
[   59.315107] Kernel Offset: 0xfc00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[   59.315211] gsmi: Log Shutdown Reason 0x02
[   59.318583] ACPI MEMORY or I/O RESET_REG.