Re: [PATCH RFC] pid: make setpgid() system call use RCU read-side critical section

[David Howells]

Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> wrote:

> It turns out that the setpgid() system call fails to enter an RCU
> read-side critical section before doing a PID-to-task_struct translation.
> This commit therefore does rcu_read_lock() before the translation, and
> also does rcu_read_unlock() after the last use of the returned pointer.
> 
> Reported-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>

Acked-by: David Howells <dhowells@xxxxxxxxxx>
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