Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6

[pandora-kernel.git] / kernel / signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index 52adf53..05853a7 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -10,7 +10,6 @@
  *             to allow signals to be sent reliably.
  */
 
-#include <linux/config.h>
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/smp_lock.h>
@@ -584,7 +583,7 @@ 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;
@@ -792,22 +791,31 @@ 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);
 
@@ -1107,7 +1115,7 @@ 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;
@@ -1127,6 +1135,9 @@ 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);
@@ -2566,6 +2577,11 @@ 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 =