ntp: Fixup adjtimex freq validation on 32-bit systems
[pandora-kernel.git] / kernel / time / ntp.c
index bca743d..34fd01e 100644 (file)
@@ -608,10 +608,14 @@ int do_adjtimex(struct timex *txc)
                        return -EINVAL;
        }
 
-       if (txc->modes & ADJ_FREQUENCY) {
-               if (LONG_MIN / PPM_SCALE > txc->freq)
+       /*
+        * Check for potential multiplication overflows that can
+        * only happen on 64-bit systems:
+        */
+       if ((txc->modes & ADJ_FREQUENCY) && (BITS_PER_LONG == 64)) {
+               if (LLONG_MIN / PPM_SCALE > txc->freq)
                        return -EINVAL;
-               if (LONG_MAX / PPM_SCALE < txc->freq)
+               if (LLONG_MAX / PPM_SCALE < txc->freq)
                        return -EINVAL;
        }