fix integer overflow in WIFSTOPPED macro

[musl] / include / stdlib.h

diff --git a/include/stdlib.h b/include/stdlib.h
index b117a45..475190b 100644 (file)
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -95,7 +95,7 @@ size_t __ctype_get_mb_cur_max(void);
 #define WTERMSIG(s) ((s) & 0x7f)
 #define WSTOPSIG(s) WEXITSTATUS(s)
 #define WIFEXITED(s) (!WTERMSIG(s))
-#define WIFSTOPPED(s) ((short)((((s)&0xffff)*0x10001)>>8) > 0x7f00)
+#define WIFSTOPPED(s) ((short)((((s)&0xffff)*0x10001U)>>8) > 0x7f00)
 #define WIFSIGNALED(s) (((s)&0xffff)-1U < 0xffu)
 
 int posix_memalign (void **, size_t, size_t);