[Bug runtime/22155] kernel panic due to NULL vma_cache_p->f_path.dentry

[penguin-kernel@i-love.sakura.ne.jp]

https://sourceware.org/bugzilla/show_bug.cgi?id=22155

--- Comment #2 from Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> ---
> But, when that function gets called, the task is stopped.
> So, hopefully the task->mm won't be changing while the task is stopped.

Java is a multi-threaded process.
Are all threads stopped when that function gets called?

> Can you show us the script that caused this panic?

I don't have the script right now (I need to ask permission for disclosure).
But the script hooks Java methods using java().class().method() and file opens.
Guru mode is not used.

> Is this panic intermittent or does it happen every time?

So far only once, while running stability test for 8 hours.

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