2 files changed, 10 insertions, 8 deletions

diff --git a/lib/inflate.c b/lib/inflate.c
index 75e7d303c72e..6db6e98d1637 100644
--- a/lib/inflate.c
+++ b/lib/inflate.c
@@ -326,7 +326,7 @@ DEBG("huft1 ");
   {
     *t = (struct huft *)NULL;
     *m = 0;
-    return 0;
+    return 2;
   }
 
 DEBG("huft2 ");
@@ -374,6 +374,7 @@ DEBG("huft5 ");
     if ((j = *p++) != 0)
       v[x[j]++] = i;
   } while (++i < n);
+  n = x[g];                   /* set n to length of v */
 
 DEBG("h6 ");
 
@@ -410,12 +411,13 @@ DEBG1("1 ");
 DEBG1("2 ");
           f -= a + 1;           /* deduct codes from patterns left */
           xp = c + k;
-          while (++j < z)       /* try smaller tables up to z bits */
-          {
-            if ((f <<= 1) <= *++xp)
-              break;            /* enough codes to use up j bits */
-            f -= *xp;           /* else deduct codes from patterns */
-          }
+          if (j < z)
+            while (++j < z)       /* try smaller tables up to z bits */
+            {
+              if ((f <<= 1) <= *++xp)
+                break;            /* enough codes to use up j bits */
+              f -= *xp;           /* else deduct codes from patterns */
+            }
         }
 DEBG1("3 ");
         z = 1 << j;             /* table entries for j-bit table */
diff --git a/lib/zlib_inflate/inftrees.c b/lib/zlib_inflate/inftrees.c
index 874950ec4858..c5f66fbb0dd0 100644
--- a/lib/zlib_inflate/inftrees.c
+++ b/lib/zlib_inflate/inftrees.c
@@ -141,7 +141,7 @@ static int huft_build(
   {
     *t = NULL;
     *m = 0;
-    return Z_OK;
+    return Z_DATA_ERROR;
   }