linux-kernel - Re: [PATCH] file capabilities: allow sigcont within session (v2)

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Message-ID: <472CE89C.2020801@kernel.org>
Date:	Sat, 03 Nov 2007 14:31:08 -0700
From:	Andrew Morgan <morgan@...nel.org>
To:	"Serge E. Hallyn" <serue@...ibm.com>
CC:	Stephen Smalley <sds@...ch.ncsc.mil>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-security-module@...r.kernel.org,
	Andrew Morton <akpm@...l.org>,
	Chris Wright <chrisw@...s-sol.org>,
	Theodore Ts'o <tytso@....edu>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Natalie Protasevich <protasnb@...il.com>
Subject: Re: [PATCH] file capabilities: allow sigcont within session (v2)

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Serge E. Hallyn wrote:
> Quoting Stephen Smalley (sds@...ch.ncsc.mil):
>> On Wed, 2007-10-31 at 18:49 -0500, Serge E. Hallyn wrote:
[..]
>>> Also don't do file-capabilities signaling checks when uids for
>>> the processes don't match, since the standard check_kill_permission
>>> will have done those checks.
>> Description doesn't match the code.
> 
> Egads.  I knew I should've just kept that part out of it for the first
> patch...
> 
> New patch on top of previous one is appended.

Dang! I stared at the code a long time to see what you were doing...

And concluded that you had coded what you intended; allow processes that
share UIDs to kill one another - independent of capabilities. The fact
that this is the reverse of the words you used to introduce your patch,
I didn't notice.

I totally missed the fact that this was (unwanted) new functionality!!
Mea culpa for the bad review.

I certainly Sign off the revised patch.

Cheers

Andrew
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