close(2) not being audited?

[Alexander Viro]

On Fri, Jan 26, 2007 at 05:01:12PM -0600, Timothy R. Chavez wrote:
> > Please, define "access".  Consider the following sequence:
> > 	on April 1st:
> > 	fd = open(foo, O_RDWR);
> > 	p = mmap(..., fd, ...);
> > 	close(fd);
> > 	two days later: modify area pointed to by p
> > 	a month later: munmap(p, ...);
> > 
> > What do you want in the log?  More specifically, _when_ do you want it?
> 
> Write out a log when the last reference to the fd is put back... whether
> that's from a close or an munmap.

Sigh...  One more time: there are two distinct classes of objects - opened
files and opened descriptors.  That's the point - by the time of munmap()
there is no file descriptor at all.  It's been gone for a month.

Descriptor getting closed != file getting closed.  If you are talking about
the last reference to opened file - OK.  But there won't necessary be
any descriptors refering to it.