mirror of
https://github.com/volatilityfoundation/volatility3.git
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mtresslerandikelos
79cf041283
Removed unnecessary header info. A symbol table without the module_kset struct will now raise a TypeError
80 lines
3.2 KiB
Python
80 lines
3.2 KiB
Python
# This file is Copyright 2020 Volatility Foundation and licensed under the Volatility Software License 1.0
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# which is available at https://www.volatilityfoundation.org/license/vsl-v1.0
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#
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import logging
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from typing import List
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from volatility.framework import interfaces, renderers, exceptions, constants, contexts
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from volatility.framework.automagic import linux
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from volatility.framework.configuration import requirements
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from volatility.framework.interfaces import plugins
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from volatility.framework.layers import intel
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from volatility.framework.objects import utility
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from volatility.plugins.linux import lsmod
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from volatility.framework.renderers import format_hints
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vollog = logging.getLogger(__name__)
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class check_modules(plugins.PluginInterface):
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"""Compares module list to sysfs info, if available"""
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@classmethod
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def get_requirements(cls) -> List[interfaces.configuration.RequirementInterface]:
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return [
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requirements.TranslationLayerRequirement(name='primary',
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description='Memory layer for the kernel',
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architectures=["Intel32", "Intel64"]),
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requirements.SymbolTableRequirement(
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name="vmlinux", description="Linux kernel symbols"),
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requirements.PluginRequirement(
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name='lsmod', plugin=lsmod.Lsmod, version=(1, 0, 0))
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]
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def get_kset_modules(self, vmlinux):
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try:
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module_kset = vmlinux.object_from_symbol("module_kset")
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except exceptions.SymbolError:
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module_kset = None
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if not module_kset:
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raise TypeError("This plugin requires the module_kset structure. This structure is not present in the supplied symbol table. This means you are either analyzing an unsupported kernel version or that your symbol table is corrupt.")
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ret = {}
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kobj_off = self.context.symbol_space.get_type(
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self.config['vmlinux'] + constants.BANG + 'module_kobject').relative_child_offset('kobj')
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for kobj in module_kset.list.to_list(vmlinux.name + constants.BANG + "kobject", "entry"):
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mod_kobj = vmlinux.object(
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object_type="module_kobject", offset=kobj.vol.offset - kobj_off)
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mod = mod_kobj.mod
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name = utility.pointer_to_string(kobj.name, 32)
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if kobj.name and kobj.reference_count() > 2:
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ret[name] = mod
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return ret
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def _generator(self):
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vmlinux = contexts.Module(
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self.context, self.config['vmlinux'], self.config['primary'], 0)
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kset_modules = self.get_kset_modules(vmlinux)
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lsmod_modules = set(str(utility.array_to_string(modules.name)) for modules in
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lsmod.Lsmod.list_modules(self.context,
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self.config['primary'], self.config['vmlinux']))
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for mod_name in set(kset_modules.keys()).difference(lsmod_modules):
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yield(0, (format_hints.Hex(kset_modules[mod_name]), str(mod_name)))
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def run(self):
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return renderers.TreeGrid([("Module Address", format_hints.Hex),
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("Module Name", str)], self._generator())
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