[NETPOLL]: allow multiple netpoll_clients to register against one interface

[powerpc.git] / kernel / signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index 293e189..c89821b 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -523,7 +523,16 @@ static int __dequeue_signal(struct sigpending *pending, sigset_t *mask,
 {
        int sig = 0;
 
-       sig = next_signal(pending, mask);
+       /* SIGKILL must have priority, otherwise it is quite easy
+        * to create an unkillable process, sending sig < SIGKILL
+        * to self */
+       if (unlikely(sigismember(&pending->signal, SIGKILL))) {
+               if (!sigismember(mask, SIGKILL))
+                       sig = SIGKILL;
+       }
+
+       if (likely(!sig))
+               sig = next_signal(pending, mask);
        if (sig) {
                if (current->notifier) {
                        if (sigismember(current->notifier_mask, sig)) {