Comment # 3 on bug 1047162 from 
For completeness, this is the issue with dockerd. That makes the most common
crashes I'm experiencing.

Jul 04 11:13:58 operator.local kernel: BUG: unable to handle kernel paging
request at 000000010000000d
Jul 04 11:13:59 operator.local kernel: IP: [<ffffffff8120f2cf>]
free_pipe_info+0x4f/0x80
Jul 04 11:13:59 operator.local kernel: PGD 12e3fd067 PUD 0
Jul 04 11:13:59 operator.local kernel: Oops: 0000 [#2] SMP
Jul 04 11:13:59 operator.local kernel: Modules linked in: xt_nat xt_tcpudp veth
ipt_MASQUERADE nf_nat_masquerade_ipv4 xfrm_user xfrm_algo iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter
ip_tables xt_conntrack x_tables nf_nat nf_conntrack br_netfilter bridge stp llc
nfsv3 nfs_acl nfs lockd grace sunrpc fscache af_packet iscsi_ibft
iscsi_boot_sysfs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel
jitterentropy_rng drbg ansi_cprng cirrus aesni_intel ttm drm_kms_helper
aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd pcspkr ppdev joydev drm
virtio_net fb_sys_fops virtio_balloon syscopyarea sysfillrect sysimgblt
i2c_piix4 parport_pc parport processor button ata_generic btrfs xor raid6_pq
ata_piix virtio_blk ahci libahci floppy serio_raw crc32c_intel uhci_hcd
ehci_hcd usbcore usb_common
Jul 04 11:13:59 operator.local kernel:  libata virtio_pci virtio_ring virtio sg
scsi_mod autofs4
Jul 04 11:13:59 operator.local kernel: CPU: 0 PID: 12675 Comm: dockerd Tainted:
G      D          4.4.73-18.17-default #1
Jul 04 11:13:59 operator.local kernel: Hardware name: QEMU Standard PC (i440FX
+ PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
Jul 04 11:13:59 operator.local kernel: task: ffff8800098f0f00 ti:
ffff880009bdc000 task.ti: ffff880009bdc000
Jul 04 11:13:59 operator.local kernel: RIP: 0010:[<ffffffff8120f2cf>] 
[<ffffffff8120f2cf>] free_pipe_info+0x4f/0x80
Jul 04 11:13:59 operator.local kernel: RSP: 0018:ffff880009bdfe58  EFLAGS:
00010202
Jul 04 11:13:59 operator.local kernel: RAX: 00000000fffffffd RBX:
0000000000000008 RCX: 0000000000000110
Jul 04 11:13:59 operator.local kernel: RDX: 0000000000000028 RSI:
ffff88001827e540 RDI: ffff880107c6fd00
Jul 04 11:13:59 operator.local kernel: RBP: ffff880107c6fd00 R08:
0000000000000000 R09: 0000000000000000
Jul 04 11:13:59 operator.local kernel: R10: ffff8800155bac10 R11:
0000000000000246 R12: ffff8800b6e04698
Jul 04 11:13:59 operator.local kernel: R13: ffff8800bb40ae20 R14:
ffff880005df7d98 R15: ffff8800b6e04698
Jul 04 11:13:59 operator.local kernel: FS:  00007f7311ffb700(0000)
GS:ffff88013fc00000(0000) knlGS:0000000000000000
Jul 04 11:13:59 operator.local kernel: CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Jul 04 11:13:59 operator.local kernel: CR2: 000000010000000d CR3:
000000012e3fa000 CR4: 00000000003406f0
Jul 04 11:13:59 operator.local kernel: DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Jul 04 11:13:59 operator.local kernel: DR3: 0000000000000000 DR6:
00000000fffe0ff0 DR7: 0000000000000400
Jul 04 11:13:59 operator.local kernel: Stack:
Jul 04 11:13:59 operator.local kernel:  ffff880107c6fd00 ffff8800155bac00
ffffffff8120f407 ffff8800155bac00
Jul 04 11:13:59 operator.local kernel:  0000000000000010 ffff8800b6e04698
ffffffff81208240 ffff8800155bac10
Jul 04 11:13:59 operator.local kernel:  ffff8800155bac00 ffff8800098f0f00
ffffffff8220f870 ffff8800098f1a44
Jul 04 11:13:59 operator.local kernel: Call Trace:
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8120f407>]
pipe_release+0x97/0xa0
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81208240>] __fput+0xe0/0x210
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8109c182>]
task_work_run+0x72/0xa0
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81079947>]
exit_to_usermode_loop+0x91/0xc2
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81003af5>]
syscall_return_slowpath+0x85/0xa0
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8160f8d0>]
int_ret_from_sys_call+0x25/0x8f
Jul 04 11:13:59 operator.local kernel: DWARF2 unwinder stuck at
int_ret_from_sys_call+0x25/0x8f
Jul 04 11:13:59 operator.local kernel:
Jul 04 11:13:59 operator.local kernel: Leftover inexact backtrace:
Jul 04 11:13:59 operator.local kernel: Code: db e8 06 b2 e7 ff 8b 45 48 85 c0
74 29 48 63 c3 48 8d 14 80 48 8b 85 80 00 00 00 48 8d 34 d0 48 8b 46 10 48 85
c0 74 06 48 89 ef <ff> 50 10 83 c3 01 3b 5d 48 72 d7 48 8b 7d 68 48 85 ff 74 07
31
Jul 04 11:13:59 operator.local kernel: RIP  [<ffffffff8120f2cf>]
free_pipe_info+0x4f/0x80
Jul 04 11:13:59 operator.local kernel:  RSP <ffff880009bdfe58>
Jul 04 11:13:59 operator.local kernel: CR2: 000000010000000d
Jul 04 11:13:59 operator.local kernel: ---[ end trace 202d284e1a04b020 ]---
ul 04 11:13:59 operator.local kernel: BUG: sleeping function called from
invalid context at ../include/linux/sched.h:2878
Jul 04 11:13:59 operator.local kernel: in_atomic(): 0, irqs_disabled(): 1, pid:
12675, name: dockerd
Jul 04 11:13:59 operator.local kernel: CPU: 0 PID: 12675 Comm: dockerd Tainted:
G      D          4.4.73-18.17-default #1
Jul 04 11:13:59 operator.local kernel: Hardware name: QEMU Standard PC (i440FX
+ PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
Jul 04 11:13:59 operator.local kernel:  0000000000000000 ffffffff813295f7
ffff8800098f0f00 0000000000003183
Jul 04 11:13:59 operator.local kernel:  ffffffff8108e291 0000000000000046
0000000000000009 0000000000003183
Jul 04 11:13:59 operator.local kernel:  ffffffff81081831 ffffffff00000000
0000000000000010 ffff880009bdfd00
Jul 04 11:13:59 operator.local kernel: Call Trace:
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81019ea9>]
dump_trace+0x59/0x320
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8101a26a>]
show_stack_log_lvl+0xfa/0x180
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8101b011>]
show_stack+0x21/0x40
Jul 04 11:13:59 operator.local kernel:  [<ffffffff813295f7>]
dump_stack+0x5c/0x85
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8108e291>]
exit_signals+0x21/0x130
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81081831>] do_exit+0xb1/0xb60
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8101a92c>] oops_end+0x9c/0xd0
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81065ca7>]
no_context+0x107/0x370
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81066b3c>]
trace_do_page_fault+0x3c/0x130
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81611bf8>]
async_page_fault+0x28/0x30
Jul 04 11:13:59 operator.local kernel: DWARF2 unwinder stuck at
async_page_fault+0x28/0x30
Jul 04 11:13:59 operator.local kernel:
Jul 04 11:13:59 operator.local kernel: Leftover inexact backtrace:
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8120f2cf>] ?
free_pipe_info+0x4f/0x80
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8120f2aa>] ?
free_pipe_info+0x2a/0x80
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8120f407>] ?
pipe_release+0x97/0xa0
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81208240>] ?
__fput+0xe0/0x210
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8109c182>] ?
task_work_run+0x72/0xa0
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81079947>] ?
exit_to_usermode_loop+0x91/0xc2
Jul 04 11:13:59 operator.local kernel:  [<ffffffff81003af5>] ?
syscall_return_slowpath+0x85/0xa0
Jul 04 11:13:59 operator.local kernel:  [<ffffffff8160f8d0>] ?
int_ret_from_sys_call+0x25/0x8f

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