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SubjectRFC [patch 34/34] PID Virtualization pidspace parent : signal behavior
make sure a process parent of a pidspace discards signals sent
from processes in that pidspace.

Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
---
signal.c | 4 ++++
1 files changed, 4 insertions(+)
Index: linux-2.6.15/kernel/signal.c
===================================================================
--- linux-2.6.15.orig/kernel/signal.c 2006-01-17 08:37:09.000000000 -0500
+++ linux-2.6.15/kernel/signal.c 2006-01-17 08:37:10.000000000 -0500
@@ -642,6 +642,10 @@
if (!valid_signal(sig))
return error;
error = -EPERM;
+
+ if (task_vpid_ctx(t, current) == 1)
+ return error;
+
if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
&& ((sig != SIGCONT) ||
(current->signal->session != t->signal->session))
--

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