Merge tag 'v3.19-rc7' into x86/asm, to refresh the branch before pulling in new changes

[firefly-linux-kernel-4.4.55.git] / kernel / time / ntp.c

diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 87a346fd6d61ff1c5c1045c9db063ee3247d2361..28bf91c60a0b412d1c97911659c30d735ba40d78 100644 (file)
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -633,6 +633,13 @@ int ntp_validate_timex(struct timex *txc)
        if ((txc->modes & ADJ_SETOFFSET) && (!capable(CAP_SYS_TIME)))
                return -EPERM;
 
+       if (txc->modes & ADJ_FREQUENCY) {
+               if (LONG_MIN / PPM_SCALE > txc->freq)
+                       return -EINVAL;
+               if (LONG_MAX / PPM_SCALE < txc->freq)
+                       return -EINVAL;
+       }
+
        return 0;
 }