Re: [PATCH v2] notifier: Fix soft lockup for notifier_call_chain().

[Eric Dumazet]

On Tue, 2016-06-28 at 08:22 +0200, Eric Dumazet wrote:

> Follow the stack trace and add another cond_resched() where it is needed
> then ?
> 
> Lot of this code was written decade ago where nobody expected a root
> user was going to try hard to crash its host ;)
> 
> I did not check if the following is valid (Maybe __fib6_clean_all() is
> called with some spinlock/rwlock held)

Well, fib6_run_gc() can call it with
spin_lock_bh(&net->ipv6.fib6_gc_lock) so this wont work.

We need more invasive changes.