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Re: CVS commit: src/sys/kern
On Sat, May 16, 2009 at 12:02:00PM +0000, YAMAMOTO Takashi wrote:
> Module Name: src
> Committed By: yamt
> Date: Sat May 16 12:02:00 UTC 2009
> Modified Files:
> src/sys/kern: init_sysctl.c
> Log Message:
> - simplify.
> - KERN_PROC: fix possible stale proc pointer dereference.
> - KERN_PROC: don't do copyout with proc_lock held.
IIRC this used to work because it locked the userspace buffer into
physical memory earlier.
I've not looked at the change, but if you release proc_lock it is
very difficult to ensure you see every process , and that the
count of processes is correct.
 consider what happens if the proc table has to be extended,
or when a process is in a fork/exit loop.
David Laight: david%l8s.co.uk@localhost
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