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https://github.com/volatilityfoundation/volatility3.git
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110 lines
3.8 KiB
Python
110 lines
3.8 KiB
Python
# This file is Copyright 2024 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 constants, exceptions, interfaces, renderers
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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.renderers import format_hints
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from volatility3.framework.symbols import linux
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from volatility3.framework.constants import architectures
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from volatility3.framework.objects import utility
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from volatility3.plugins.linux import pslist, lsmod
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vollog = logging.getLogger(__name__)
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class Kthreads(plugins.PluginInterface):
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"""Enumerates kthread functions"""
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_required_framework_version = (2, 11, 0)
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_version = (1, 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=architectures.LINUX_ARCHS,
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),
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requirements.VersionRequirement(
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name="linuxutils", component=linux.LinuxUtilities, version=(2, 1, 0)
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),
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]
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def _generator(self):
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vmlinux = self.context.modules[self.config["kernel"]]
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modules = lsmod.Lsmod.list_modules(self.context, vmlinux.name)
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handlers = linux.LinuxUtilities.generate_kernel_handler_info(
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self.context, vmlinux.name, modules
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)
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kthread_type = vmlinux.get_type(
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vmlinux.symbol_table_name + constants.BANG + "kthread"
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)
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if not kthread_type.has_member("threadfn"):
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raise exceptions.VolatilityException(
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"Unsupported kthread implementation. This plugin only works with kernels >= 5.8"
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)
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for task in pslist.PsList.list_tasks(
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self.context, vmlinux.name, include_threads=True
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):
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if not task.is_kernel_thread:
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continue
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if task.has_member("worker_private"):
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# kernels >= 5.17 e32cf5dfbe227b355776948b2c9b5691b84d1cbd
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ktread_base_pointer = task.worker_private
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else:
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# 5.8 <= kernels < 5.17 in 52782c92ac85c4e393eb4a903a62e6c24afa633f threadfn
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# was added to struct kthread. task.set_child_tid is safe on those versions.
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ktread_base_pointer = task.set_child_tid
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if not ktread_base_pointer.is_readable():
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continue
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kthread = ktread_base_pointer.dereference().cast("kthread")
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threadfn = kthread.threadfn
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if not (threadfn and threadfn.is_readable()):
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continue
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task_name = utility.array_to_string(task.comm)
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# kernels >= 5.17 in d6986ce24fc00b0638bd29efe8fb7ba7619ed2aa full_name was added to kthread
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thread_name = (
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utility.pointer_to_string(kthread.full_name, count=255)
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if kthread.has_member("full_name")
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else task_name
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)
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module_name, symbol_name = linux.LinuxUtilities.lookup_module_address(
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vmlinux, handlers, threadfn
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)
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fields = [
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task.pid,
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thread_name,
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format_hints.Hex(threadfn),
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module_name,
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symbol_name,
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]
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yield 0, fields
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def run(self):
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return renderers.TreeGrid(
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[
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("TID", int),
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("Thread Name", str),
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("Handler Address", format_hints.Hex),
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("Module", str),
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("Symbol", str),
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],
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self._generator(),
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)
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