---

yaml
---
r: 198735
b: refs/heads/master
c: 065add3
h: refs/heads/master
i:
  198733: 2f95d9a
  198731: 7e66846
  198727: efd2730
  198719: 8cded3b
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e0129ef91ed758c06b6557c36124acfb2e1c7305
+refs/heads/master: 065add3941bdca54fe04ed3471a96bce9af88793

trunk/kernel/signal.c

@@ -642,7 +642,7 @@ static inline bool si_fromuser(const struct siginfo *info)
 static int check_kill_permission(int sig, struct siginfo *info,
 				 struct task_struct *t)
 {
-	const struct cred *cred = current_cred(), *tcred;
+	const struct cred *cred, *tcred;
 	struct pid *sid;
 	int error;
 
@@ -656,8 +656,10 @@ static int check_kill_permission(int sig, struct siginfo *info,
 	if (error)
 		return error;
 
+	cred = current_cred();
 	tcred = __task_cred(t);
-	if ((cred->euid ^ tcred->suid) &&
+	if (!same_thread_group(current, t) &&
+	    (cred->euid ^ tcred->suid) &&
 	    (cred->euid ^ tcred->uid) &&
 	    (cred->uid  ^ tcred->suid) &&
 	    (cred->uid  ^ tcred->uid) &&