Re: [GIT PULL] audit patches

[Andrew Morton <akpm@linux-foundation.org>]

On Sun, 18 Feb 2007 04:01:27 +0000 Al Viro <viro@ftp.linux.org.uk> wrote:

> Misc audit patches (resend again...); the most intrusive one is AUDIT_FD_PAIR,
> allowing to log descriptor numbers from syscalls that do not return them in
> usual way (i.e. pipe() and socketpair()).  It took some massage of
> the failure exits in sys_socketpair(); the rest is absolutely trivial.
> Please, pull from
> git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current.git/ audit.b37

Please send patches to the list for review if practical?  In this case it
was.  I trust davem has had a look at the non-trivial changes to
sys_socketpair().



Looking at the changes to audit_receive_msg():


				if (sid) {
					if (selinux_sid_to_string(
							sid, &ctx, &len)) {
						audit_log_format(ab,
							" ssid=%u", sid);
						/* Maybe call audit_panic? */
					} else
						audit_log_format(ab,
							" subj=%s", ctx);
					kfree(ctx);
				}

This is assuming that selinux_sid_to_string() always initialises `ctx'.

But AFAICT there are two error paths in security_sid_to_context() which
forget to do that, so we end up doing kfree(uninitialised-local).

I'd consider that a shortcoming in security_sid_to_context(), so not a
problem in this patch, as long as people agree with my blaming above.


The coding style in there is a bit odd-looking.

The new __audit_fd_pair() has unneeded braces in it.