Kernel panic in rpc_new_client() function.

Issue

• Kernel panic in rpc_new_client() due to NULL pointer dereference.

[770629.267929] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[770629.269797] IP: [<ffffffffa0266a4a>] rpc_new_client+0x19a/0x2f0 [sunrpc]
[770629.271108] PGD 192a2067 PUD ae143067 PMD 0 
[770629.272382] Oops: 0000 [#1] SMP 
[770629.273620] Modules linked in: sg nfnetlink bluetooth rfkill iptable_filter ip_tables fuse btrfs zlib_deflate raid6_pq xor vfat msdos fat xfs libcrc32c bridge stp llc mvfs(OF) nfsv3 nfs fscache coretemp crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel ppdev vmw_balloon aesni_intel lrw gf128mul glue_helper ablk_helper cryptd serio_raw pcspkr parport_pc vmw_vmci i2c_piix4 parport shpchp nfsd auth_rpcgss nfs_acl lockd sunrpc uinput binfmt_misc ext4 mbcache jbd2 sr_mod cdrom ata_generic pata_acpi sd_mod crc_t10dif crct10dif_common vmwgfx e1000 drm_kms_helper ttm vmw_pvscsi drm i2c_core ata_piix libata floppy dm_mirror dm_region_hash dm_log dm_mod
[770629.280014] CPU: 1 PID: 13723 Comm: java Tainted: GF          O--------------   3.10.0-229.7.2.el7.x86_64 #1
[770629.281269] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 04/14/2014
[770629.282524] task: ffff880813e94440 ti: ffff880102ff4000 task.ti: ffff880102ff4000
[770629.283750] RIP: 0010:[<ffffffffa0266a4a>]  [<ffffffffa0266a4a>] rpc_new_client+0x19a/0x2f0 [sunrpc]
[770629.284998] RSP: 0018:ffff880102ff7980  EFLAGS: 00010246
[770629.286233] RAX: 0000000000000000 RBX: ffff880055b49400 RCX: ffffea0014e5be5c
[770629.287441] RDX: 0000000000009600 RSI: 0000000000001388 RDI: ffff880055b494c8
[770629.288630] RBP: ffff880102ff79b0 R08: ffffffff8183b448 R09: ffffea0014e5bf00
[770629.289798] R10: 000000000000002c R11: ffffea00204b4a00 R12: ffff88078e5a9a80
[770629.290952] R13: ffffffffa04da270 R14: ffff880785bd1000 R15: 0000000000000000
[770629.292094] FS:  0000000000000000(0000) GS:ffff88083fc80000(0000) knlGS:0000000000000000
[770629.293214] CS:  0010 DS: 002b ES: 002b CR0: 000000008005003b
[770629.294293] CR2: 0000000000000008 CR3: 00000000ae32f000 CR4: 00000000000007e0
[770629.295395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[770629.296478] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[770629.297517] Stack:
[770629.298551]  ffffffffa04da2d0 ffff88078e5a9a80 ffff88078e5a9a80 ffff880102ff7ae8
[770629.299614]  ffffffffa04da270 0000000000000004 ffff880102ff79d8 ffffffffa026738a
[770629.300651]  ffffffffa0269bf8 ffff88078e5a9a80 ffff880102ff79e8 ffff880102ff7a78
[770629.301688] Call Trace:
[770629.302743]  [<ffffffffa026738a>] rpc_create_xprt+0x1a/0xa0 [sunrpc]
[770629.303806]  [<ffffffffa0269bf8>] ? xprt_create_transport+0x138/0x250 [sunrpc]
[770629.304830]  [<ffffffffa02674d0>] rpc_create+0xc0/0x190 [sunrpc]
[770629.305846]  [<ffffffff811ac4ae>] ? __kmalloc+0x2e/0x230
[770629.306845]  [<ffffffffa04b7172>] ? mdki_linux_kmalloc+0x2f/0x31 [mvfs]
[770629.307845]  [<ffffffffa04b3e4d>] mdki_linux_clntkudp_create+0x95/0xca [mvfs]
[770629.308841]  [<ffffffffa04ac5ab>] mvfs_linux_clntkudp_create+0x5d/0x5f [mvfs]
[770629.309815]  [<ffffffffa049904f>] mvfs_clnt_get+0x363/0x6cf [mvfs]
[770629.310766]  [<ffffffffa049abff>] mvfs_vwcall+0xe2/0x73b [mvfs]
[770629.311733]  [<ffffffff81166639>] ? truncate_pagecache+0x59/0x60
[770629.312681]  [<ffffffffa04b7172>] ? mdki_linux_kmalloc+0x2f/0x31 [mvfs]
[770629.313614]  [<ffffffffa0491b3a>] mvfs_clnt_setattr_locked+0x381/0x554 [mvfs]
[770629.314536]  [<ffffffffa046a647>] mvfs_sync_attr+0x119/0x1ab [mvfs]
[770629.315452]  [<ffffffff811aac8d>] ? kfree+0xfd/0x140
[770629.316398]  [<ffffffffa046decd>] mfs_inactive_common+0x285/0x39e [mvfs]
[770629.317341]  [<ffffffffa04a9413>] mvfs_linux_inactive+0xc9/0x19b [mvfs]
[770629.318273]  [<ffffffffa04b564f>] mvfs_clear_inode+0x7a/0xed [mvfs]
[770629.319228]  [<ffffffffa04b56d4>] mvfs_evict_inode+0x12/0x2b [mvfs]
[770629.320141]  [<ffffffff811e1d67>] evict+0xa7/0x170
[770629.321043]  [<ffffffff811e25a5>] iput+0xf5/0x180
[770629.321937]  [<ffffffff811dd1c8>] dentry_kill+0x168/0x1b0
[770629.322807]  [<ffffffff811dd26c>] dput+0x5c/0xd0
[770629.323693]  [<ffffffff811c82cb>] __fput+0x17b/0x270
[770629.324527]  [<ffffffff811c84fe>] ____fput+0xe/0x10
[770629.325334]  [<ffffffff81093b54>] task_work_run+0xc4/0xe0
[770629.326122]  [<ffffffff810745bb>] do_exit+0x2cb/0xa60
[770629.326868]  [<ffffffff810938fe>] ? find_task_by_pid_ns+0xe/0x30
[770629.327585]  [<ffffffff810faa54>] ? __audit_syscall_entry+0xb4/0x110
[770629.328290]  [<ffffffff81020de3>] ? syscall_trace_enter+0x173/0x220
[770629.328985]  [<ffffffff81074d87>] SyS_exit+0x17/0x20
[770629.329650]  [<ffffffff816164e9>] ia32_do_call+0x13/0x13
[770629.330292] Code: 43 78 48 8d bb c8 00 00 00 48 89 7b 70 48 8b 30 e8 4c 4d 01 00 c7 03 01 00 00 00 65 48 8b 04 25 c0 b7 00 00 48 8b 80 60 07 00 00 <4c> 8b 68 08 49 83 c5 45 4c 89 ef e8 e6 62 07 e1 83 f8 20 0f 8e 
[770629.331708] RIP  [<ffffffffa0266a4a>] rpc_new_client+0x19a/0x2f0 [sunrpc]
[770629.332421]  RSP <ffff880102ff7980>
[770629.333108] CR2: 0000000000000008