The kernel crashes due to NULL pointer dereference happens in pipe_write()

Issue

• The kernel crashes due to NULL pointer dereference happens in pipe_write()

BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff811ae070>] pipe_write+0x2e0/0x5f0
Kernel PGD 8000000012acc067 PUD 9a953067 PMD 0 
User   PGD 12acc067 PUD 9a953067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/module/ipmi_msghandler/initstate
CPU 0 
Modules linked in: [...]
Pid: 1627, comm: appthread Not tainted 2.6.32-754.48.1.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
RIP: 0010:[<ffffffff811ae070>]  [<ffffffff811ae070>] pipe_write+0x2e0/0x5f0
RSP: 0018:ffff880095d23ce8  EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88002432dc00 RCX: 0000000000000258
RDX: ffff88002432de58 RSI: ffff880095d23e88 RDI: ffff8800359eab80
RBP: ffff880095d23d88 R08: ffffffff811a2a30 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000009
R13: 0000000000000000 R14: 000000000000000f R15: 0000000000000009
FS:  00007ff75d494700(0000) GS:ffff880028200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000b790c000 CR4: 00000000000407f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process TempUnix_140155 (pid: 1627, threadinfo ffff880095d20000, task ffff88013b596040)
Stack:
 0000000195d23d18 ffff8800359eab80 ffff880095d23d08 ffff8800359eaac8
<d> 8000000033e69067 ffffffff810f0c43 ffff88003793ebc0 0000000000000001
<d> 0000000000000001 ffff880095d23e88 ffff880095d23d48 ffffffff81165f40
Call Trace:
 [<ffffffff810f0c43>] ? audit_copy_inode+0x83/0xc0
 [<ffffffff81165f40>] ? __vma_link_rb+0x30/0x40
 [<ffffffff811a2b30>] do_sync_write+0x100/0x140
 [<ffffffff81161d66>] ? handle_mm_fault+0x306/0x450
 [<ffffffff810ac200>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff811685c5>] ? do_mmap_pgoff+0x335/0x380
 [<ffffffff8124519c>] ? security_file_permission+0x1c/0x20
 [<ffffffff811a2e2a>] vfs_write+0xba/0x1a0
 [<ffffffff811a4336>] ? fget_light_pos+0x16/0x50
 [<ffffffff811a3961>] sys_write+0x51/0xb0
 [<ffffffff815663a7>] system_call_fastpath+0x35/0x3a
Code: fd ff ff 44 8b 73 1c 41 01 d6 41 83 ee 01 41 83 e6 0f 4b 8d 0c b6 48 c1 e1 03 48 8d 14 0b 8b 42 64 03 42 60 4c 8b 6a 68 89 45 cc <45> 8b 55 00 45 85 d2 0f 84 13 01 00 00 48 98 49 8d 04 07 48 3d 
RIP  [<ffffffff811ae070>] pipe_write+0x2e0/0x5f0
 RSP <ffff880095d23ce8>
CR2: 0000000000000000