CODEWITHSUNDEEP
linux-kerneldriver
Yuval
Yuval

Reputation: 325

Can a module proceed to run after rmmod?

What happens when module_exit is triggered, while the module is still running? And Is it possible that the module will still run afterwards?

Upvotes: 0

Views: 201

Answers (1)

ugoren
ugoren

Reputation: 16441

Once module_exit has returned, nothing in the module should run. If something does, the system will likely panic when the module's memory is released.

You must either:
1. Prevent this by holding a reference on the module, and not releasing it as long as anything can run.
2. Unregister all hooks you've registered in module_exit and use proper synchronization, to assure that everything which was running has stopped.

Upvotes: 3

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