Kernel panic in _write_lock_bh

Issue

• Kernel panic, system crashed, or system rebooted
• The console shows messages similar to the following

        [9748517.441952] BUG: unable to handle kernel NULL pointer dereference at 0000000000000148
        [9748517.442155] IP: [<ffffffff8153c3d9>] _write_lock_bh+0x19/0x30
        [9748517.442274] PGD c252bc067 PUD 81aeb1067 PMD 901f40067 PTE 0
        [9748517.442388] Oops: 0002 [#1] SMP 
        [9748517.442471] last sysfs file: /sys/devices/system/cpu/online
        [9748517.442579] CPU 3 
        [9748517.442604] Modules linked in: softdog autofs4 nfs lockd fscache auth_rpcgss nfs_acl sunrpc be2iscsi iscsi_boot_sysfs uio cxgb3 mdio iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi vsock(U) vmblock(U) fuse ppdev parport_pc parport microcode vmware_balloon vmxnet3 vmci(U) i2c_piix4 i2c_core sg shpchp ext4 jbd2 mbcache sd_mod crc_t10dif sr_mod cdrom vmw_pvscsi pata_acpi ata_generic ata_piix dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
        [9748517.443448] 
        [9748517.443509] Pid: 2169, comm: rpciod/3 Not tainted 2.6.32-573.18.1.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
        [9748517.443792] RIP: 0010:[<ffffffff8153c3d9>]  [<ffffffff8153c3d9>] _write_lock_bh+0x19/0x30
        [9748517.443971] RSP: 0018:ffff880c251d3dc0  EFLAGS: 00010206
        [9748517.444074] RAX: ffff880c251d3fd8 RBX: 0000000000000148 RCX: ffff880be787aad8
        [9748517.444237] RDX: ffff880be787aad0 RSI: 0000000000000282 RDI: 0000000000000148
        [9748517.444399] RBP: ffff880c251d3dd0 R08: 0000000000000000 R09: 0000000000000000
        [9748517.444561] R10: 0000000000000000 R11: ae56500092f02898 R12: ffff880c2613b5d0
        [9748517.444722] R13: 0000000000000000 R14: ffff8808ef0c29c0 R15: 0000000000000148
        [9748517.444886] FS:  0000000000000000(0000) GS:ffff880028260000(0000) knlGS:0000000000000000
        [9748517.445087] CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
        [9748517.445195] CR2: 0000000000000148 CR3: 0000000529097000 CR4: 00000000000006e0
        [9748517.445408] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
        [9748517.445592] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
        [9748517.445757] Process rpciod/3 (pid: 2169, threadinfo ffff880c251d0000, task ffff880c251c4040)
        [9748517.445933] Stack:
        [9748517.445999]  ffff880c251d3dd0 ffff880c2613b000 ffff880c251d3e30 ffffffffa02a8c4b
        [9748517.446130] <d> 0000000000000000 0000000000000000 ffff880c251d3e30 0000000055e1e8c6
        [9748517.446306] <d> ffff880c251d3fd8 ffffe8ffffc61700 ffffe8ffffc61700 ffffffffa02a88b0
        [9748517.446524] Call Trace:
        [9748517.446614]  [<ffffffffa02a8c4b>] xs_tcp_setup_socket+0x39b/0x4b0 [sunrpc]
        [9748517.446742]  [<ffffffffa02a88b0>] ? xs_tcp_setup_socket+0x0/0x4b0 [sunrpc]
        [9748517.446866]  [<ffffffff8109a780>] worker_thread+0x170/0x2a0
        [9748517.446976]  [<ffffffff810a1460>] ? autoremove_wake_function+0x0/0x40
        [9748517.447093]  [<ffffffff8109a610>] ? worker_thread+0x0/0x2a0
        [9748517.447201]  [<ffffffff810a0fce>] kthread+0x9e/0xc0
        [9748517.447302]  [<ffffffff8100c28a>] child_rip+0xa/0x20
        [9748517.447402]  [<ffffffff810a0f30>] ? kthread+0x0/0xc0
        [9748517.447501]  [<ffffffff8100c280>] ? child_rip+0x0/0x20
        [9748517.447601] Code: 00 01 48 89 f7 57 9d 0f 1f 44 00 00 c9 c3 0f 1f 40 00 55 48 89 e5 53 48 83 ec 08 0f 1f 44 00 00 48 89 fb e8 8a 2f b4 ff 48 89 df <f0> 81 2f 00 00 00 01 74 05 e8 39 18 d6 ff 48 83 c4 08 5b c9 c3 
        [9748517.448046] RIP  [<ffffffff8153c3d9>] _write_lock_bh+0x19/0x30
        [9748517.448158]  RSP <ffff880c251d3dc0>
        [9748517.448240] CR2: 0000000000000148