RFC [patch 34/34] PID Virtualization pidspace parent : signal behavior

[Serge Hallyn]

make sure a process parent of a pidspace discards signals sent
from processes in that pidspace.

Signed-off-by: Cedric Le Goater <clg@xxxxxxxxxx>
---
 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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