System crash with NS-Link driver

Issue

• System crashed with NS-Link driver

<6>nslink: NS-Link driver, version 5.03 2-Oct-2012
<6>nslink: Built Aug  1 2014 14:42:28
<6>NS-Link driver is major 244
<6>nslink: Connected -- 0.
<7>bond0: no IPv6 routers present
<7>em4: no IPv6 routers present
<6>usb 3-1: USB disconnect, device number 2
<1>BUG: unable to handle kernel NULL pointer dereference at 00000000000000ec
<1>IP: [<ffffffffa026f7a7>] nrp_write+0x177/0x370 [nslink]
<4>PGD 837354067 PUD 8337dc067 PMD 0 
<4>Oops: 0000 [#1] SMP 
<4>last sysfs file: /sys/devices/pci0000:00/0000:00:02.0/0000:03:00.3/device
<4>CPU 13 
<4>Modules linked in: tcp_diag inet_diag nslink(U) autofs4 nfs lockd fscache auth_rpcgss nfs_acl sunrpc cpufreq_ondemand freq_table pcc_cpufreq bonding 8021q garp stp llc ipv6 microcode power_meter iTCO_wdt iTCO_vendor_support hpilo hpwdt tg3(U) ptp pps_core serio_raw sg lpc_ich mfd_core shpchp ext4 jbd2 mbcache sr_mod cdrom sd_mod crc_t10dif pata_acpi ata_generic ata_piix hpsa(U) dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
<4>
<4>Pid: 22937, comm: vtrproxy Not tainted 2.6.32-431.17.1.el6.x86_64 #1 HP ProLiant DL360p Gen8
<4>RIP: 0010:[<ffffffffa026f7a7>]  [<ffffffffa026f7a7>] nrp_write+0x177/0x370 [nslink]
<4>RSP: 0000:ffff880437f3bd98  EFLAGS: 00010292
<4>RAX: 0000000000000000 RBX: ffff8803a922c000 RCX: 00000000000029b9
<4>RDX: ffff8804387d9148 RSI: 0000000000000292 RDI: 0000000000000292
<4>RBP: ffff880437f3bde8 R08: ffff8803a922c1b0 R09: 00000000ff1ff888
<4>R10: 0000000000000005 R11: 0000000000000000 R12: ffff8804387d9000
<4>R13: 0000000000000004 R14: ffff8803a66af000 R15: 0000000000000000
<4>FS:  0000000000000000(0000) GS:ffff8800366e0000(0000) knlGS:0000000000000000
<4>CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
<4>CR2: 00000000000000ec CR3: 0000000835857000 CR4: 00000000001407e0
<4>DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4>DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
<4>Process vtrproxy (pid: 22937, threadinfo ffff880437f3a000, task ffff880436cb7540)
<4>Stack:
<4> ffff880437f3bdc8 ffff8804387d9148 ffff8803a922c000 0000000000000246
<4><d> ffff880437f3bde8 ffff8803a922c000 ffff8804379b4cc0 0000000000000004
<4><d> ffff8803a66af000 ffff8803a922c4d0 ffff880437f3be78 ffffffff8133661c
<4>Call Trace:
<4> [<ffffffff8133661c>] n_tty_write+0x33c/0x460
<4> [<ffffffff81061d00>] ? default_wake_function+0x0/0x20
<4> [<ffffffff81333391>] tty_write+0x1b1/0x2a0
<4> [<ffffffff813362e0>] ? n_tty_write+0x0/0x460
<4> [<ffffffff81188c38>] vfs_write+0xb8/0x1a0
<4> [<ffffffff81189531>] sys_write+0x51/0x90
<4> [<ffffffff81051083>] ia32_sysret+0x0/0x5
<4>Code: 50 48 8b 7d c8 e8 9a ae 2b e1 48 8b 4d b0 49 01 ce 49 83 7c 24 20 00 0f 85 6f ff ff ff 48 8b 7d b8 e8 5e 17 e3 e0 49 8b 44 24 20 <f6> 80 ec 00 00 00 10 74 30 49 8b 44 24 28 c7 40 54 01 00 00 00 
<1>RIP  [<ffffffffa026f7a7>] nrp_write+0x177/0x370 [nslink]
<4> RSP <ffff880437f3bd98>
<4>CR2: 00000000000000ec