Hi,
I have found a bug(maybe it is) in the plugin linux_pstree.It will lead to an exception 'int() argument must be a string or a number,not CType'.

OS Version: Ubuntu 14.04 server
Kernel: 3.19.0-25-generic #26~14.04.1-Ubuntu SMP Fri Jul 24 21:16:20 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Volatility version: 2.5 downloaded from github 23 Feb 2016
Affected Plugin: Linux_pstree

what the error is like:

python vol.py -f Ubuntu1404.lime --profile=LinuxUbuntu1404x64 linux_pstree --output=html --output-file=pstree.html
Outputting to: pstree1.html
ERROR   : volatility.debug    : int() argument must be a string or a number, not 'CType'

then I try to debug volatility and find the exception raised from the code below in volatility/plugins/linux/pstree.py

def generator(self, data):
        self.procs = OrderedDict()
        for task in data:
            self.recurse_task(task, 0, 0,self.procs)

        for offset,name,level,pid,ppid,uid,euid,gid in self.procs.values():
            if offset:
                # print euid.obj_offset
                yield(0,[Address(offset),
                         str(name),
                         str(level),
                         int(pid),
                         int(ppid),
                         int(uid),
                         int(gid),
                         int(euid)]) # here is the place where the exception rises

in the variable watcher we can see euid is an instance of CType(I do not know what is CType ).And inside it we can see the real value of euid.It equals the value of euid.obj_offset.

When I try to change the code above into the code like this:

-----
int(euid)]) 
++++
int(euid.obj_offset)]

Then everything goes well.But I think that is not a perfect way to solve it.

I don't know why~