qilingframework / qilingframework/qiling
Multithreaded mode is missing initialization in Linux
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- Dominant language
- Python
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Description
ql.os.thread_class is not properly initialized in multithreaded mode for Linux and thus attempting to run any binary results in an exception.
$ qltool run -f f9ab06de9ffa4b27692b3ed687c1b3ff8717d41a5950e7eaa9a3656b40bed8ca -m --rootfs ~/rootfs
Traceback (most recent call last):
File "/home/fdd/.local/bin/qltool", line 253, in <module>
ql.run(timeout=options.timeout)
File "/home/fdd/.local/lib/python3.10/site-packages/qiling/core.py", line 573, in run
self.os.run()
File "/home/fdd/.local/lib/python3.10/site-packages/qiling/os/linux/linux.py", line 147, in run
thread_management.run()
File "/home/fdd/.local/lib/python3.10/site-packages/qiling/os/linux/thread.py", line 606, in run
self.main_thread = self.ql.os.thread_class.spawn(self.ql, self.ql.loader.elf_entry, self.ql.os.exit_point)
AttributeError: 'NoneType' object has no attribute 'spawn'
Tested in Ubuntu 22.04 / Python 3.10.
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with qiling/os/linux/linux.py and qiling/os/linux/thread.py, following the multithreaded path into thread_management.run(). Inspect how ql.os.thread_class is assigned before thread.py:606 calls spawn. Reproduce the qltool command from the report and confirm that running a Linux binary in multithreaded mode no longer raises the NoneType spawn exception.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- operating-systems, reverse-engineering
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100