make sure a process parent of a pidspace discards signals sent
from processes in that pidspace.
Signed-off-by: Cedric Le Goater <[email protected]>
--
kernel/signal.c | 4 ++++
1 files changed, 4 insertions(+)
Index: linux-2.6.15-rc1/kernel/signal.c
===================================================================
--- linux-2.6.15-rc1.orig/kernel/signal.c 2005-12-08 01:50:37.000000000 -0500
+++ linux-2.6.15-rc1/kernel/signal.c 2005-12-08 01:50:37.000000000 -0500
@@ -651,6 +651,10 @@ static int check_kill_permission(int sig
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))
--