[414908.259339] general protection fault: 0000 [#1] SMP
[414908.263293] Modules linked in: nfsv4 dns_resolver nfsv3 btrfs raid6_pq xor crc32c_generic ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi rpcsec_gss_krb5 nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc quota_v2 quota_tree e752x_edac lpc_ich edac_core mfd_core shpchp processor rng_core psmouse i2c_i801 i2c_core thermal_sys tpm_tis tpm pcspkr serio_raw evdev ext4 jbd2 crc16 dm_snapshot dm_bufio dm_mirror dm_region_hash dm_log dm_mod sd_mod crc_t10dif crct10dif_common sg sr_mod cdrom ata_generic ehci_pci e1000 uhci_hcd ata_piix ehci_hcd mptspi mptscsih floppy libata mptbase usbcore scsi_transport_spi button usb_common
[414908.263293] CPU: 1 PID: 1464 Comm: nfsd Not tainted 3.16.0-ucs193-amd64 #1 Debian 3.16.7-ckt25-2~bpo70+1~ucs3.3.193.201604181018
[414908.263293] Hardware name: FUJITSU SIEMENS PRIMERGY RX200S2/D1790/M73IL, BIOS 6.0 Rev. R04A5F5.1790 01/16/2006
[414908.263293] task: ffff8800cae7f330 ti: ffff8800cae80000 task.ti: ffff8800cae80000
[414908.263293] RIP: __d_lookup (fs/dcache.c:2226) 
[414908.263293] RSP: 0018:ffff8800cae83bf8  EFLAGS: 00010206
[414908.263293] RAX: ffffc900003f2160 RBX: 00011ac400000000 RCX: 000000000000000d
[414908.263293] RDX: ffffc90000005000 RSI: ffff8800cae83cd8 RDI: ffff88011c38b6d8
[414908.263293] RBP: ffff88011c38b6d8 R08: 000000000000000b R09: 000000000000000c
[414908.263293] R10: 0000000000000004 R11: ffff880109ad2300 R12: ffff8800cae83cd8
[414908.263293] R13: 0000000000000030 R14: 00000000e1b5a97e R15: ffff8801046a10b0
[414908.263293] FS:  0000000000000000(0000) GS:ffff880127c80000(0000) knlGS:0000000000000000
[414908.263293] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[414908.263293] CR2: ffffffffff600400 CR3: 00000000c4a35000 CR4: 00000000000007e0
[414908.263293] Stack:
[414908.263293]  ffff8800cfd61200 ffff8801046a10b0 ffff8800cae7f330 00000000000e1bbe
[414908.263293]  ffff8800cae83cd8 ffff88011c38b6d8 ffff8800cae83cb7 0000000000000000
[414908.263293]  ffff8801046a10b0 ffffffff811d3913 0000000000000000 ffff88011c38b6d8
[414908.263293] Call Trace:
[414908.263293] ? d_lookup (fs/dcache.c:2170) 
[414908.263293] ? lookup_dcache (fs/namei.c:1319) 
[414908.263293] ? __lookup_hash (fs/namei.c:1376) 
[414908.263293] ? lookup_one_len (fs/namei.c:2158) 
[414908.263293] ? nfsd_lookup_dentry (fs/nfsd/vfs.c:218) nfsd
[414908.263293] ? nfsd_lookup (fs/nfsd/vfs.c:263) nfsd
[414908.263293] ? svcauth_unix_set_client (net/sunrpc/svcauth_unix.c:716) sunrpc
[414908.263293] ? nfsd3_proc_lookup (fs/nfsd/nfs3proc.c:101) nfsd
[414908.263293] ? nfsd_dispatch (fs/nfsd/nfssvc.c:638 fs/nfsd/nfssvc.c:690) nfsd
[414908.263293] ? svc_process_common (net/sunrpc/svc.c:1206) sunrpc
[414908.263293] ? nfsd_destroy (fs/nfsd/nfssvc.c:566) nfsd
[414908.263293] ? svc_process (net/sunrpc/svc.c:1331) sunrpc
[414908.263293] ? nfsd (fs/nfsd/nfssvc.c:612) nfsd
[414908.263293] ? kthread (kernel/kthread.c:207) 
[414908.263293] ? flush_kthread_worker (kernel/kthread.c:176) 
[414908.263293] ? ret_from_fork (arch/x86/kernel/entry_64S:352) 
[414908.263293] ? flush_kthread_worker (kernel/kthread.c:176) 
[414908.263293] Code: f8 48 c1 e8 06 44 01 f0 69 c0 01 00 37 9e d3 e8 48 8d 04 c2 48 8b 18 48 83 e3 fe 75 0e eb 34 0f 1f 40 00 48 8b 1b 48 85 db 74 28 <44> 39 73 18 75 f2 4c 8d 7b 50 4c 89 ff e8 76 e8 39 00 48 39 6b
All code
========
   0:   f8                      clc    
   1:   48 c1 e8 06             shr    $0x6,%rax
   5:   44 01 f0                add    %r14d,%eax
   8:   69 c0 01 00 37 9e       imul   $0x9e370001,%eax,%eax
   e:   d3 e8                   shr    %cl,%eax
  10:   48 8d 04 c2             lea    (%rdx,%rax,8),%rax
  14:   48 8b 18                mov    (%rax),%rbx
  17:   48 83 e3 fe             and    $0xfffffffffffffffe,%rbx
  1b:   75 0e                   jne    0x2b
  1d:   eb 34                   jmp    0x53
  1f:   0f 1f 40 00             nopl   0x0(%rax)
  23:   48 8b 1b                mov    (%rbx),%rbx
  26:   48 85 db                test   %rbx,%rbx
  29:   74 28                   je     0x53
  2b:*  44 39 73 18             cmp    %r14d,0x18(%rbx)         <-- trapping instruction
  2f:   75 f2                   jne    0x23
  31:   4c 8d 7b 50             lea    0x50(%rbx),%r15
  35:   4c 89 ff                mov    %r15,%rdi
  38:   e8 76 e8 39 00          callq  0x39e8b3
  3d:   48                      rex.W
  3e:   39                      .byte 0x39
  3f:   6b                      .byte 0x6b

Code starting with the faulting instruction
===========================================
   0:   44 39 73 18             cmp    %r14d,0x18(%rbx)
   4:   75 f2                   jne    0xfffffffffffffff8
   6:   4c 8d 7b 50             lea    0x50(%rbx),%r15
   a:   4c 89 ff                mov    %r15,%rdi
   d:   e8 76 e8 39 00          callq  0x39e888
  12:   48                      rex.W
  13:   39                      .byte 0x39
  14:   6b                      .byte 0x6b
[414908.263293] RIP __d_lookup (fs/dcache.c:2226) 
[414908.263293]  RSP <ffff8800cae83bf8>
[414908.746026] ---[ end trace 2b2970d77ac95af2 ]---