Re: [PATCH] new setprocuid syscall
Martin Dalecki (firstname.lastname@example.org)
Tue, 20 Feb 2001 11:53:21 +0100
Peter Samuelson wrote:
> [BERECZ Szabolcs]
> > Here is a new syscall. With this you can change the owner of a running
> > procces.
> > + if (current->euid)
> > + return -EPERM;
> Use capable().
> > + p = find_task_by_pid(pid);
> > + p->fsuid = p->euid = p->suid = p->uid = uid;
> Race -- you need to make sure the task_struct doesn't disappear out
> from under you.
> Anyway, why not use the interface 'chown uid /proc/pid'? No new
> syscall, no arch-dependent part, no user-space tool, etc.
Becouse of exactly the same race condition as above maybe?
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