1 files changed, 3 insertions, 2 deletions

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 2d546c67f7c3..26889366929a 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -32,6 +32,7 @@
 #include <linux/user.h>
 #include <linux/security.h>
 #include <linux/audit.h>
+#include <linux/signal.h>
 
 #include <asm/segment.h>
 #include <asm/page.h>
@@ -609,7 +610,7 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
                 /* continue and stop at next (return from) syscall */
         case PTRACE_CONT:
                 /* restart after signal. */
-                if ((unsigned long) data >= _NSIG)
+                if (!valid_signal(data))
                         return -EIO;
                 if (request == PTRACE_SYSCALL)
                         set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
@@ -637,7 +638,7 @@ do_ptrace(struct task_struct *child, long request, long addr, long data)
 
         case PTRACE_SINGLESTEP:
                 /* set the trap flag. */
-                if ((unsigned long) data >= _NSIG)
+                if (!valid_signal(data))
                         return -EIO;
                 clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
                 child->exit_code = data;