From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
To: oleg@redhat.com, ebiederm@xmission.com, roland@redhat.com,
bastian@waldi.eu.org
Cc: daniel@hozac.com, xemul@openvz.org, containers@lists.osdl.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 6/6][v5] SI_USER: Masquerade si_pid when crossing pid ns boundary
Date: Sat, 27 Dec 2008 12:55:11 -0800 [thread overview]
Message-ID: <20081227205511.GE27337@us.ibm.com> (raw)
In-Reply-To: <20081227204658.GA27197@us.ibm.com>
From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Date: Wed, 24 Dec 2008 14:14:18 -0800
Subject: [PATCH 6/6][v5] SI_USER: Masquerade si_pid when crossing pid ns boundary
When sending a signal to a descendant namespace, set ->si_pid to 0 since
the sender does not have a pid in the receiver's namespace.
Note:
- If rt_sigqueueinfo() sets si_code to SI_USER when sending a
signal across a pid namespace boundary, the value in ->si_pid
will be cleared to 0.
Changelog[v5]:
- (Oleg Nesterov) Address both sys_kill() and sys_tkill() cases
in send_signal() to simplify code (this drops patch 7/7 from
earlier version of patchset).
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
---
kernel/signal.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/kernel/signal.c b/kernel/signal.c
index d90b033..7ffd044 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -951,6 +951,8 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
break;
default:
copy_siginfo(&q->info, info);
+ if (from_ancestor_ns)
+ q->info.si_pid = 0;
break;
}
} else if (!is_si_special(info)) {
--
1.5.2.5
prev parent reply other threads:[~2008-12-27 20:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-27 20:46 [PATCH 0/6][v5]: Container-init signal semantics Sukadev Bhattiprolu
2008-12-27 20:49 ` [PATCH 1/6][v5] Remove 'handler' parameter to tracehook functions Sukadev Bhattiprolu
2008-12-27 20:51 ` [PATCH 2/6][v5] Protect init from unwanted signals more Sukadev Bhattiprolu
2008-12-27 20:52 ` [PATCH 3/6][v5] Define siginfo_from_ancestor_ns() Sukadev Bhattiprolu
2008-12-31 0:12 ` Roland McGrath
2009-01-05 12:42 ` Oleg Nesterov
2009-01-05 14:33 ` Oleg Nesterov
2008-12-27 20:53 ` [PATCH 4/6][v5] Protect cinit from unblocked SIG_DFL signals Sukadev Bhattiprolu
2008-12-31 0:19 ` Roland McGrath
2009-01-05 13:24 ` Oleg Nesterov
2008-12-27 20:54 ` [PATCH 5/6][v5] Protect cinit from blocked fatal signals Sukadev Bhattiprolu
2009-01-05 15:16 ` Oleg Nesterov
2008-12-27 20:55 ` Sukadev Bhattiprolu [this message]
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