Re: [1/1][PATCH] nproc v2: netlink access to /proc information

Roger Luethi
2004-09-14T21:20:24Z

On Tue, 14 Sep 2004 12:05:09 -0700, Chris Wright wrote:
> Understood. Question is, if the request is for data that's associated
> with a task that is in the middle of an execve(setuid_root_app), does
> the credential-check/skb-fill for response happen atomically w.r.t. said
> execve? IOW, is it possible to pass credential check, then fill data
> that's become sensitive since the check happened?

It shouldn't be once we implement access control. I don't pretend to know
what the best way is to prevent that. Checking several times just shrinks
the race window, so I suppose we'd have to lock the source data structures
down prior to checking credentials and copying data.

Roger