Hello,
[..]
[ 272.687656] vma ffff8800b855a5a0 start 00007f3576d58000 end 00007f3576f66000
next ffff8800b977d2c0 prev ffff8800bdfb1860 mm ffff8801315ff200
prot 8000000000000025 anon_vma ffff8800b7e583b0 vm_ops (null)
pgoff 7f3576d58 file (null) private_data (null)
flags: 0x100073(read|write|mayread|maywrite|mayexec|account)
[ 272.691793] ------------[ cut here ]------------
[ 272.692820] kernel BUG at mm/rmap.c:1251!
[ 272.693843] invalid opcode: 0000 [#1] PREEMPT SMP
[ 272.694858] Modules linked in: snd_hda_codec_realtek snd_hda_codec_generic mousedev snd_hda_intel snd_hda_codec snd_hda_core coretemp hwmon snd_pcm r8169 snd_timer crc32c_intel snd mii i2c_i801 soundcore lpc_ich acpi_cpufreq mfd_core processor sch_fq_codel hid_generic usbhid hid sd_mod ahci libahci libata ehci_pci ehci_hcd scsi_mod usbcore usb_common
[ 272.697061] CPU: 2 PID: 38 Comm: khugepaged Not tainted 4.7.0-rc3-next-20160615-dbg-00005-gfd11984-dirty #493
[ 272.699208] task: ffff88013332a980 ti: ffff880133348000 task.ti: ffff880133348000
[ 272.700280] RIP: 0010:[<ffffffff810f67ad>] [<ffffffff810f67ad>] page_add_new_anon_rmap+0x68/0x136
[ 272.701359] RSP: 0000:ffff88013334bcd0 EFLAGS: 00010296
[ 272.702427] RAX: 0000000000000149 RBX: ffffea0001978000 RCX: 0000000000000002
[ 272.703498] RDX: ffff880137d10401 RSI: ffffffff81798adf RDI: 00000000ffffffff
[ 272.704574] RBP: ffff88013334bcf0 R08: 0000000000000001 R09: 0000000000000000
[ 272.705648] R10: ffff88013334bca0 R11: 00000000fffffffc R12: 0000000000000200
[ 272.706714] R13: 00007f3577000000 R14: ffff8800b855a5a0 R15: ffff880000000000
[ 272.707782] FS: 0000000000000000(0000) GS:ffff880137d00000(0000) knlGS:0000000000000000
[ 272.708852] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 272.709913] CR2: 00007f142dd37000 CR3: 00000000baaf4000 CR4: 00000000000006e0
[ 272.710961] Stack:
[ 272.711998] ffffea0001978000 ffff8800badbadc0 ffffea0002e77280 8000000065e000e7
[ 272.713036] ffff88013334be68 ffffffff81114671 ffff88013332a980 ffff88013334c000
[ 272.714068] ffff88013332a980 ffff8800b9dcb000 00007f3577200000 000000000101bda0
[ 272.715092] Call Trace:
[ 272.716100] [<ffffffff81114671>] khugepaged+0x2227/0x2751
[ 272.717105] [<ffffffff8106f766>] ? prepare_to_wait_event+0xe4/0xe4
[ 272.718094] [<ffffffff8111244a>] ? hugepage_vma_revalidate+0x6f/0x6f
[ 272.719087] [<ffffffff8111244a>] ? hugepage_vma_revalidate+0x6f/0x6f
[ 272.720067] [<ffffffff81055f22>] kthread+0xf3/0xfb
[ 272.721035] [<ffffffff814ab198>] ? _raw_spin_unlock_irq+0x27/0x45
[ 272.721990] [<ffffffff814abaff>] ret_from_fork+0x1f/0x40
[ 272.722932] [<ffffffff81055e2f>] ? kthread_create_on_node+0x1ca/0x1ca
[ 272.723860] Code: 19 e4 41 81 e4 01 fe ff ff 41 81 c4 00 02 00 00 eb 06 41 bc 01 00 00 00 4d 39 2e 77 06 4d 3b 6e 08 72 0a 4c 89 f7 e8 73 11 ff ff <0f> 0b 48 8b 53 20 48 8d 42 ff 80 e2 01 48 0f 44 c3 0f ba 28 12
[ 272.724956] RIP [<ffffffff810f67ad>] page_add_new_anon_rmap+0x68/0x136
[ 272.725918] RSP <ffff88013334bcd0>
[ 272.726890] ---[ end trace eb7290ad13e0e7f0 ]---
[ 272.727842] BUG: sleeping function called from invalid context at include/linux/sched.h:2960
[ 272.728798] in_atomic(): 1, irqs_disabled(): 0, pid: 38, name: khugepaged
[ 272.729821] INFO: lockdep is turned off.
[ 272.730762] Preemption disabled at:[<ffffffff8111464d>] khugepaged+0x2203/0x2751
[ 272.732618] CPU: 2 PID: 38 Comm: khugepaged Tainted: G D 4.7.0-rc3-next-20160615-dbg-00005-gfd11984-dirty #493
[ 272.734460] 0000000000000000 ffff88013334b9d0 ffffffff811ec73b 0000000000000000
[ 272.735382] ffff88013332a980 ffff88013334b9f8 ffffffff81059b98 ffffffff8174c31c
[ 272.736296] 0000000000000b90 0000000000000000 ffff88013334ba20 ffffffff81059c0f
[ 272.737203] Call Trace:
[ 272.738085] [<ffffffff811ec73b>] dump_stack+0x68/0x92
[ 272.738961] [<ffffffff81059b98>] ___might_sleep+0x1fb/0x202
[ 272.739831] [<ffffffff81059c0f>] __might_sleep+0x70/0x77
[ 272.740684] [<ffffffff81048ac7>] exit_signals+0x1e/0x119
[ 272.741528] [<ffffffff8107dd86>] ? kmsg_dump+0x12c/0x154
[ 272.742362] [<ffffffff8103f23a>] do_exit+0x111/0x8f3
[ 272.743184] [<ffffffff8107dda3>] ? kmsg_dump+0x149/0x154
[ 272.743996] [<ffffffff81014b39>] oops_end+0x9d/0xa4
[ 272.744801] [<ffffffff81014c6e>] die+0x55/0x5e
[ 272.745602] [<ffffffff81012450>] do_trap+0x67/0x11d
[ 272.746401] [<ffffffff8101272d>] do_error_trap+0x100/0x10f
[ 272.747190] [<ffffffff810f67ad>] ? page_add_new_anon_rmap+0x68/0x136
[ 272.747974] [<ffffffff8107d3b9>] ? vprintk_emit+0x427/0x449
[ 272.748756] [<ffffffff81001036>] ? trace_hardirqs_off_thunk+0x1a/0x1c
[ 272.749537] [<ffffffff81012889>] do_invalid_op+0x1b/0x1d
[ 272.750316] [<ffffffff814acb65>] invalid_op+0x15/0x20
[ 272.751097] [<ffffffff810f67ad>] ? page_add_new_anon_rmap+0x68/0x136
[ 272.751879] [<ffffffff81114671>] khugepaged+0x2227/0x2751
[ 272.752660] [<ffffffff8106f766>] ? prepare_to_wait_event+0xe4/0xe4
[ 272.753442] [<ffffffff8111244a>] ? hugepage_vma_revalidate+0x6f/0x6f
[ 272.754223] [<ffffffff8111244a>] ? hugepage_vma_revalidate+0x6f/0x6f
[ 272.755001] [<ffffffff81055f22>] kthread+0xf3/0xfb
[ 272.755781] [<ffffffff814ab198>] ? _raw_spin_unlock_irq+0x27/0x45
[ 272.756557] [<ffffffff814abaff>] ret_from_fork+0x1f/0x40
[ 272.757335] [<ffffffff81055e2f>] ? kthread_create_on_node+0x1ca/0x1ca
[ 272.758124] note: khugepaged[38] exited with preempt_count 1
-ss
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