This commit was manufactured by cvs2svn to create tag

[linux-2.6.git] / kernel / signal.c

diff --git a/kernel/signal.c b/kernel/signal.c
index 6ea3d40..b3574b0 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -417,6 +417,7 @@ flush_signal_handlers(struct task_struct *t, int force_default)
        }
 }
 
+EXPORT_SYMBOL_GPL(flush_signal_handlers);
 
 /* Notify the system that a driver wants to block all signals for this
  * process, and wants to be notified if any signals at all were to be
@@ -1054,6 +1055,9 @@ int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p)
        unsigned long flags;
        int ret;
 
+       if (!vx_check(vx_task_xid(p), VX_ADMIN|VX_WATCH|VX_IDENT))
+               return -ESRCH;
+
        ret = check_kill_permission(sig, info, p);
        if (!ret && sig && p->sighand) {
                spin_lock_irqsave(&p->sighand->siglock, flags);
@@ -1552,6 +1556,34 @@ do_notify_parent_cldstop(struct task_struct *tsk, struct task_struct *parent)
        spin_unlock_irqrestore(&sighand->siglock, flags);
 }
 
+int print_fatal_signals = 0;
+
+static void print_fatal_signal(struct pt_regs *regs, int signr)
+{
+       int i;
+       unsigned char insn;
+       printk("%s/%d: potentially unexpected fatal signal %d.\n",
+               current->comm, current->pid, signr);
+               
+#ifdef __i386__
+       printk("code at %08lx: ", regs->eip);
+       for (i = 0; i < 16; i++) {
+               __get_user(insn, (unsigned char *)(regs->eip + i));
+               printk("%02x ", insn);
+       }
+#endif 
+       printk("\n");
+       show_regs(regs);
+}
+
+static int __init setup_print_fatal_signals(char *str)
+{
+       get_option (&str, &print_fatal_signals);
+
+       return 1;
+}
+
+__setup("print-fatal-signals=", setup_print_fatal_signals);
 
 #ifndef HAVE_ARCH_GET_SIGNAL_TO_DELIVER
 
@@ -1743,6 +1775,11 @@ relock:
                if (!signr)
                        break; /* will return 0 */
 
+               if ((signr == SIGSEGV) && print_fatal_signals) {
+                       spin_unlock_irq(&current->sighand->siglock);
+                       print_fatal_signal(regs, signr);
+                       spin_lock_irq(&current->sighand->siglock);
+               }
                if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
                        ptrace_signal_deliver(regs, cookie);
 
@@ -1847,6 +1884,8 @@ relock:
                 * Anything else is fatal, maybe with a core dump.
                 */
                current->flags |= PF_SIGNALED;
+               if (print_fatal_signals)
+                       print_fatal_signal(regs, signr);
                if (sig_kernel_coredump(signr) &&
                    do_coredump((long)signr, signr, regs)) {
                        /*