X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fsignal.c;h=fb5da6d19f14eef721f28750307c9654f17a8bfa;hb=40cddf2cbd02aa830254afcd5a1a21b4e882a189;hp=ecb610d0dc615b446525facd3e159a9dba56c04a;hpb=6ab3d5624e172c553004ecc862bfeac16d9d68b7;p=linux-2.6-omap-h63xx.git

diff --git a/kernel/signal.c b/kernel/signal.c
index ecb610d0dc6..fb5da6d19f1 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -417,9 +417,8 @@ static int collect_signal(int sig, struct sigpending *list, siginfo_t *info)
 static int __dequeue_signal(struct sigpending *pending, sigset_t *mask,
 			siginfo_t *info)
 {
-	int sig = 0;
+	int sig = next_signal(pending, mask);
 
-	sig = next_signal(pending, mask);
 	if (sig) {
 		if (current->notifier) {
 			if (sigismember(current->notifier_mask, sig)) {
@@ -432,9 +431,7 @@ static int __dequeue_signal(struct sigpending *pending, sigset_t *mask,
 
 		if (!collect_signal(sig, pending, info))
 			sig = 0;
-				
 	}
-	recalc_sigpending();
 
 	return sig;
 }
@@ -451,6 +448,7 @@ int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info)
 	if (!signr)
 		signr = __dequeue_signal(&tsk->signal->shared_pending,
 					 mask, info);
+	recalc_sigpending_tsk(tsk);
  	if (signr && unlikely(sig_kernel_stop(signr))) {
  		/*
  		 * Set a marker that we have dequeued a stop signal.  Our
@@ -583,7 +581,7 @@ static int check_kill_permission(int sig, struct siginfo *info,
 	    && !capable(CAP_KILL))
 		return error;
 
-	error = security_task_kill(t, info, sig);
+	error = security_task_kill(t, info, sig, 0);
 	if (!error)
 		audit_signal_info(sig, t); /* Let audit system see the signal */
 	return error;
@@ -791,22 +789,31 @@ out:
 /*
  * Force a signal that the process can't ignore: if necessary
  * we unblock the signal and change any SIG_IGN to SIG_DFL.
+ *
+ * Note: If we unblock the signal, we always reset it to SIG_DFL,
+ * since we do not want to have a signal handler that was blocked
+ * be invoked when user space had explicitly blocked it.
+ *
+ * We don't want to have recursive SIGSEGV's etc, for example.
  */
-
 int
 force_sig_info(int sig, struct siginfo *info, struct task_struct *t)
 {
 	unsigned long int flags;
-	int ret;
+	int ret, blocked, ignored;
+	struct k_sigaction *action;
 
 	spin_lock_irqsave(&t->sighand->siglock, flags);
-	if (t->sighand->action[sig-1].sa.sa_handler == SIG_IGN) {
-		t->sighand->action[sig-1].sa.sa_handler = SIG_DFL;
-	}
-	if (sigismember(&t->blocked, sig)) {
-		sigdelset(&t->blocked, sig);
+	action = &t->sighand->action[sig-1];
+	ignored = action->sa.sa_handler == SIG_IGN;
+	blocked = sigismember(&t->blocked, sig);
+	if (blocked || ignored) {
+		action->sa.sa_handler = SIG_DFL;
+		if (blocked) {
+			sigdelset(&t->blocked, sig);
+			recalc_sigpending_tsk(t);
+		}
 	}
-	recalc_sigpending_tsk(t);
 	ret = specific_send_sig_info(sig, info, t);
 	spin_unlock_irqrestore(&t->sighand->siglock, flags);
 
@@ -1106,7 +1113,7 @@ kill_proc_info(int sig, struct siginfo *info, pid_t pid)
 
 /* like kill_proc_info(), but doesn't use uid/euid of "current" */
 int kill_proc_info_as_uid(int sig, struct siginfo *info, pid_t pid,
-		      uid_t uid, uid_t euid)
+		      uid_t uid, uid_t euid, u32 secid)
 {
 	int ret = -EINVAL;
 	struct task_struct *p;
@@ -1126,6 +1133,9 @@ int kill_proc_info_as_uid(int sig, struct siginfo *info, pid_t pid,
 		ret = -EPERM;
 		goto out_unlock;
 	}
+	ret = security_task_kill(p, info, sig, secid);
+	if (ret)
+		goto out_unlock;
 	if (sig && p->sighand) {
 		unsigned long flags;
 		spin_lock_irqsave(&p->sighand->siglock, flags);
@@ -2565,6 +2575,11 @@ asmlinkage long sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize)
 }
 #endif /* __ARCH_WANT_SYS_RT_SIGSUSPEND */
 
+__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma)
+{
+	return NULL;
+}
+
 void __init signals_init(void)
 {
 	sigqueue_cachep =