x86: signal: use signal_fault() in sys_sigreturn()

Impact: cleanup

Call signal_fault() in error route of sys_sigreturn().
Change log level to KERN_EMERG if current is init.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 12 deletions

diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index b1cc6da64208..2725a294d734 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -594,17 +594,7 @@ asmlinkage unsigned long sys_sigreturn(unsigned long __unused)
         return ax;
 
 badframe:
-        if (show_unhandled_signals && printk_ratelimit()) {
-                printk("%s%s[%d] bad frame in sigreturn frame:"
-                        "%p ip:%lx sp:%lx oeax:%lx",
-                    task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
-                    current->comm, task_pid_nr(current), frame, regs->ip,
-                    regs->sp, regs->orig_ax);
-                print_vma_addr(" in ", regs->ip);
-                printk(KERN_CONT "\n");
-        }
-
-        force_sig(SIGSEGV, current);
+        signal_fault(regs, frame, "sigreturn");
 
         return 0;
 }
@@ -901,8 +891,9 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
         struct task_struct *me = current;
 
         if (show_unhandled_signals && printk_ratelimit()) {
-                printk(KERN_INFO
+                printk("%s"
                        "%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
+                       task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
                        me->comm, me->pid, where, frame,
                        regs->ip, regs->sp, regs->orig_ax);
                 print_vma_addr(" in ", regs->ip);