From c091cb7b143ee9571eccf25a77f8ab4e416502ba Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Wed, 4 Aug 2010 16:59:14 +0100
Subject: [PATCH] --- yaml --- r: 202555 b: refs/heads/master c:
 694f690d27dadccc8cb9d90532e76593b61fe098 h: refs/heads/master i:   202553:
 9643150404461287e583b570ef7bd994776a1dfe   202551:
 7c80a98c07f48e436e58f4cd4c3c4d1d67f1e081 v: v3

---
 [refs]                | 2 +-
 trunk/kernel/signal.c | 9 ++++++---
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/[refs] b/[refs]
index 4dd550aed53c..f70fad03c673 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e75aa85892b2ee78c79edac720868cbef16e62eb
+refs/heads/master: 694f690d27dadccc8cb9d90532e76593b61fe098
diff --git a/trunk/kernel/signal.c b/trunk/kernel/signal.c
index 906ae5a1779c..bded65187780 100644
--- a/trunk/kernel/signal.c
+++ b/trunk/kernel/signal.c
@@ -637,7 +637,7 @@ static inline bool si_fromuser(const struct siginfo *info)
 
 /*
  * Bad permissions for sending the signal
- * - the caller must hold at least the RCU read lock
+ * - the caller must hold the RCU read lock
  */
 static int check_kill_permission(int sig, struct siginfo *info,
 				 struct task_struct *t)
@@ -1127,11 +1127,14 @@ struct sighand_struct *lock_task_sighand(struct task_struct *tsk, unsigned long
 
 /*
  * send signal info to all the members of a group
- * - the caller must hold the RCU read lock at least
  */
 int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p)
 {
-	int ret = check_kill_permission(sig, info, p);
+	int ret;
+
+	rcu_read_lock();
+	ret = check_kill_permission(sig, info, p);
+	rcu_read_unlock();
 
 	if (!ret && sig)
 		ret = do_send_sig_info(sig, info, p, true);