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Re: Locking question

Mark Keaton <> wrote:
> So, I am wondering if anyone knows if this is a bug in the kernel (i.e., 
> "softnet_lock" should have been locked before calling ip6_output())? 
> Or, am I not understanding the real locking strategy used by these 
> functions?

It should be locked by softnet_lock.  Unfortunately, entry/exit paths into
the stack (and different parts of the stack, like in your example) are not
very well contained in this respect; softnet_lock is a big lock covering
paths across multiple layers, so it is easy to end up with a problem like
this.  The ultimate goal is to dismantle softnet_lock.


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