Issue

When loading the kernel module sbc_fitpc2_wdt a kernel panic occurs:

BUG: unable to handle kernel NULL pointer dereference at (null) 
IP: [<ffffffff81271f6b>] strcmp+0xb/0x30 
PGD 3db38067 PUD 3dab2067 PMD 0  
Oops: 0000 [#1] SMP  
last sysfs file: /sys/module/wm8350/refcnt 
CPU 7  
Modules linked in: sbc_fitpc2_wdt(+) xp gru ab3100_core dcdbas sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf ipv6 e1000e bnx2 ipmi_si ipmi_msghandler hpwdt microcode serio_raw i5000_edac edac_core i5k_amb ext4 mbcache jbd2 hpsa cciss pata_acpi ata_generic ata_piix radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core dm_mirror dm_region_hash dm_log dm_mod [last unloaded: wm8350] 

Pid: 3699, comm: modprobe Tainted: G         C ----------------   2.6.32-220.4.2.el6.x86_64 #1 HP ProLiant DL360 G5 
RIP: 0010:[<ffffffff81271f6b>]  [<ffffffff81271f6b>] strcmp+0xb/0x30 
RSP: 0018:ffff88003d38def8  EFLAGS: 00010292 
RAX: 0000000000000053 RBX: 0000000000000000 RCX: 0000000000000000 
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffffffa0e426e8 
RBP: ffff88003d38def8 R08: 0000000000000000 R09: 0000000000000000 
R10: ffff88000240f180 R11: 0000000000000000 R12: ffffffffa0e45000 
R13: 0000000000913490 R14: 0000000000000000 R15: 0000000000000000 
FS:  00007fb19cc14700(0000) GS:ffff8800023c0000(0000) knlGS:0000000000000000 
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 
CR2: 0000000000000000 CR3: 000000003db1e000 CR4: 00000000000006e0 
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 
Process modprobe (pid: 3699, threadinfo ffff88003d38c000, task ffff88003daa6080) 
Stack: 
 ffff88003d38df18 ffffffffa0e45022 0000000000000000 0000000000000000 
<0> ffff88003d38df48 ffffffff8100204c 0000000000000000 ffffffffa0e42860 
<0> 0000000000003230 0000000000913490 ffff88003d38df78 ffffffff810af4e1 
Call Trace: 
 [<ffffffffa0e45022>] fitpc2_wdt_init+0x22/0x146 [sbc_fitpc2_wdt] 
 [<ffffffff8100204c>] do_one_initcall+0x3c/0x1d0 
 [<ffffffff810af4e1>] sys_init_module+0xe1/0x250 
 [<ffffffff8100b0f2>] system_call_fastpath+0x16/0x1b 
Code: 84 ff 40 88 39 74 0d 48 83 c1 01 48 83 ea 01 75 e7 c6 01 00 c9 c3 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 0f 1f 40 00 0f b6 07 <0f> b6 16 48 83 c7 01 48 83 c6 01 38 d0 75 0e 84 c0 75 ea 31 c0  
RIP  [<ffffffff81271f6b>] strcmp+0xb/0x30 
 RSP <ffff88003d38def8> 
CR2: 0000000000000000 
---[ end trace 8a9fbed50005ed48 ]--- 
Kernel panic - not syncing: Fatal exception 
Pid: 3699, comm: modprobe Tainted: G      D  C ----------------   2.6.32-220.4.2.el6.x86_64 #1 
Call Trace: 
 [<ffffffff814ec2ba>] ? panic+0x78/0x143 
 [<ffffffff814f0444>] ? oops_end+0xe4/0x100 
 [<ffffffff8104234b>] ? no_context+0xfb/0x260 
 [<ffffffff810425d5>] ? __bad_area_nosemaphore+0x125/0x1e0 
 [<ffffffff810426fe>] ? bad_area+0x4e/0x60 
 [<ffffffff81042e03>] ? __do_page_fault+0x3c3/0x480 
 [<ffffffff81278f8c>] ? __bitmap_weight+0x8c/0xb0 
 [<ffffffff8112433f>] ? free_hot_page+0x2f/0x60 
 [<ffffffff81010b2e>] ? copy_user_generic+0xe/0x20 
 [<ffffffff81114831>] ? probe_kernel_write+0x41/0x70 
 [<ffffffff814f23fe>] ? do_page_fault+0x3e/0xa0 
 [<ffffffffa0e45000>] ? fitpc2_wdt_init+0x0/0x146 [sbc_fitpc2_wdt] 
 [<ffffffff814ef7b5>] ? page_fault+0x25/0x30 
 [<ffffffffa0e45000>] ? fitpc2_wdt_init+0x0/0x146 [sbc_fitpc2_wdt] 
 [<ffffffff81271f6b>] ? strcmp+0xb/0x30 
 [<ffffffff81096d15>] ? __blocking_notifier_call_chain+0x65/0x80 
 [<ffffffffa0e45022>] ? fitpc2_wdt_init+0x22/0x146 [sbc_fitpc2_wdt] 
 [<ffffffff8100204c>] ? do_one_initcall+0x3c/0x1d0 
 [<ffffffff810af4e1>] ? sys_init_module+0xe1/0x250 
 [<ffffffff8100b0f2>] ? system_call_fastpath+0x16/0x1b  panic occurred, switching back to text console