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https://github.com/volatilityfoundation/volatility3.git
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89 lines
3.0 KiB
Python
89 lines
3.0 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 volatility3.framework import interfaces, renderers, exceptions, constants
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from volatility3.framework.configuration import requirements
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from volatility3.framework.interfaces import plugins
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from volatility3.framework.objects import utility
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from volatility3.framework.renderers import format_hints
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from volatility3.plugins.linux import lsmod
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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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_required_framework_version = (2, 0, 0)
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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.ModuleRequirement(
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name="kernel",
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description="Linux kernel",
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architectures=["Intel32", "Intel64"],
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),
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requirements.PluginRequirement(
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name="lsmod", plugin=lsmod.Lsmod, version=(2, 0, 0)
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),
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]
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@classmethod
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def get_kset_modules(
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cls, context: interfaces.context.ContextInterface, vmlinux_name: str
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):
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vmlinux = context.modules[vmlinux_name]
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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(
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"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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)
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ret = {}
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kobj_off = vmlinux.get_type("module_kobject").relative_child_offset("kobj")
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for kobj in module_kset.list.to_list(
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vmlinux.symbol_table_name + constants.BANG + "kobject", "entry"
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):
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mod_kobj = vmlinux.object(
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object_type="module_kobject",
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offset=kobj.vol.offset - kobj_off,
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absolute=True,
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)
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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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kset_modules = self.get_kset_modules(self.context, self.config["kernel"])
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lsmod_modules = set(
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str(utility.array_to_string(modules.name))
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for modules in lsmod.Lsmod.list_modules(self.context, self.config["kernel"])
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)
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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(
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[("Module Address", format_hints.Hex), ("Module Name", str)],
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self._generator(),
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)
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