signals: check_kill_permission(): don't check creds if same_thread_group()

[mv-sheeva.git] / kernel / signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index 825a3f24ad760d88018f21710a882a2b8fe36cb0..2ee9573ed11fe62c1b85c4fa39d7b3b5d4a355b1 100644 (file)
--- a/kernel/signal.c
+++ b/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) &&