From: Oleg Nesterov <oleg@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Daniel Lezcano <dlezcano@fr.ibm.com>,
Sukadev Bhattiprolu <sukadev@us.ibm.com>,
Linux Containers <containers@lists.osdl.org>,
roland@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/4] signals: SEND_SIG_NOINFO should be considered as SI_FROMUSER()
Date: Sun, 4 Oct 2009 04:25:56 +0200 [thread overview]
Message-ID: <20091004022556.GF21006@redhat.com> (raw)
In-Reply-To: <20091004021918.GB21006@redhat.com>
On 10/04, Oleg Nesterov wrote:
>
> No changes in compiled code. The patch adds the new helper, si_fromuser()
> and changes check_kill_permission() to use this helper.
>
> The real effect of this patch is that from now we "officially" consider
> SEND_SIG_NOINFO signal as "from user-space" signals. This is already true
> if we look at the code which uses SEND_SIG_NOINFO, except __send_signal()
> has another opinion - see the next patch.
>
> The naming of these special SEND_SIG_XXX siginfo's is really bad imho.
> From __send_signal()'s pov they mean
>
> SEND_SIG_NOINFO from user
To clarify, "from user" for SEND_SIG_NOINFO/SI_USER mean: sent by kernel
on behalf of some process. We should check permissions, sub-namespace,
we should fill si_pid/uid, etc.
Oleg.
next prev parent reply other threads:[~2009-10-04 2:31 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4AC608BE.9020805@fr.ibm.com>
2009-10-03 17:10 ` pidns : PR_SET_PDEATHSIG + SIGKILL regression Sukadev Bhattiprolu
2009-10-04 2:18 ` [PATCH 0/4] Was: " Oleg Nesterov
2009-10-04 2:19 ` [PATCH 1/4] signals: SEND_SIG_NOINFO should be considered as SI_FROMUSER() Oleg Nesterov
2009-10-04 2:25 ` Oleg Nesterov [this message]
2009-10-05 17:58 ` Sukadev Bhattiprolu
2009-10-05 18:39 ` Oleg Nesterov
2009-10-06 0:09 ` Sukadev Bhattiprolu
2009-10-06 7:31 ` Roland McGrath
2009-10-06 13:37 ` Oleg Nesterov
2009-10-06 17:57 ` Roland McGrath
2009-10-07 11:30 ` Oleg Nesterov
2009-10-08 1:57 ` Roland McGrath
2009-10-04 2:19 ` [PATCH 2/4] signals: send_signal: use si_fromuser() to detect from_ancestor_ns Oleg Nesterov
2009-10-05 18:12 ` Sukadev Bhattiprolu
2009-10-05 18:25 ` Oleg Nesterov
2009-10-05 19:37 ` Sukadev Bhattiprolu
2009-10-05 19:44 ` Oleg Nesterov
2009-10-05 19:55 ` Oleg Nesterov
2009-10-06 0:06 ` Sukadev Bhattiprolu
2009-10-06 1:09 ` Oleg Nesterov
2009-10-06 2:34 ` Sukadev Bhattiprolu
2009-10-06 13:18 ` Oleg Nesterov
2009-10-06 18:01 ` Roland McGrath
2009-10-06 0:16 ` Sukadev Bhattiprolu
2009-10-04 2:20 ` [PATCH 3/4] signals: cosmetic, collect_signal: use SI_USER Oleg Nesterov
2009-10-05 18:03 ` Sukadev Bhattiprolu
2009-10-04 2:20 ` [PATCH 4/4] signals: kill force_sig_specific() Oleg Nesterov
2009-10-05 18:04 ` Sukadev Bhattiprolu
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