Re: [BUG] signal: sighand unprotected when accessed by /proc
From: Oleg Nesterov
Date: Tue Jun 03 2014 - 16:04:37 EST
Damn, sorry for noise...
On 06/03, Oleg Nesterov wrote:
>
> I'll try to recheck rt_mutex_unlock() tomorrow. _Perhaps_ rcu_read_unlock()
> should be shifted from lock_task_sighand() to unlock_task_sighand() to
> ensure that rt_mutex_unlock() does nothihg with this memory after it
> makes another lock/unlock possible.
I meant, we need to ensure it does nothing with this memory, otherwise we
need to delay rcu_read_unlock() till unlock_task_sighand().
Oleg.
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