Bug#646866: NULL dereference (BUG) after 'find /sys'

[Jonathan Nieder <jrnieder@gmail.com>]

Ben Hutchings wrote:
> On Thu, 2011-10-27 at 23:15 +0200, bla wrote:

>> BUG: unable to handle kernel NULL pointer dereference at (null)
>> IP: [<c113b852>] strlen+0x8/0x11
>> *pde = 00000000 
>> Oops: 0000 [#1] SMP 
>> last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
[...]
>> Call Trace:
>>  [<c10f3a2a>] ? sysfs_readdir+0xe0/0x13a
>>  [<c10be348>] ? filldir64+0x0/0xc5
>>  [<c10be5db>] ? vfs_readdir+0x62/0x8c
>>  [<c10be348>] ? filldir64+0x0/0xc5
>>  [<c10be66b>] ? sys_getdents64+0x66/0xa5
>>  [<c10030fb>] ? sysenter_do_call+0x12/0x28
>> Code: eb 04 19 c0 0c 01 5e 5f c3 56 89 c6 89 d0 88 c4 ac 38 e0 74 09 84 c0 75 f7 be 01 00 00 00 89 f0 48 5e c3 57 83 c9 ff 89 c7 31 c0 <f2> ae f7 d1 49 89 c8 5f c3 57 31 ff 85 c9 74 0e 89 c7 89 d0 f2 
>> EIP: [<c113b852>] strlen+0x8/0x11 SS:ESP 0068:dc373f4c
>> CR2: 0000000000000000
>> ---[ end trace 3cc3dd6f2ee885e8 ]---
[...]
>> Happened after executing: find /sys -iname "*coale*"
[...]
> Please test whether this happens without the VirtualBox modules loaded.

Ping.  Was this reproducible at all?