diff --git a/ChangeLog b/ChangeLog
index d15964db69..0426d63690 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-09-26  Alexey Makhalov  <amakhalov@vmware.com>
+
+	* elf/dl-tunables.c (do_tunable_update_val): Range checking fix.
+	* scripts/gen-tunables.awk: Set unspecified minval and/or maxval
+	values to correct default value for given type.
+
 2017-09-26  H.J. Lu  <hongjiu.lu@intel.com>
 
 	[BZ #22101]
diff --git a/elf/dl-tunables.c b/elf/dl-tunables.c
index b964a09413..cc2c637543 100644
--- a/elf/dl-tunables.c
+++ b/elf/dl-tunables.c
@@ -89,18 +89,11 @@ get_next_env (char **envp, char **name, size_t *namelen, char **val,
   return NULL;
 }
 
-#define TUNABLE_SET_VAL_IF_VALID_RANGE(__cur, __val, __type, __default_min, \
-				       __default_max)			      \
+#define TUNABLE_SET_VAL_IF_VALID_RANGE(__cur, __val, __type)		      \
 ({									      \
   __type min = (__cur)->type.min;					      \
   __type max = (__cur)->type.max;					      \
 									      \
-  if (min == max)							      \
-    {									      \
-      min = __default_min;						      \
-      max = __default_max;						      \
-    }									      \
-									      \
   if ((__type) (__val) >= min && (__type) (val) <= max)			      \
     {									      \
       (__cur)->val.numval = val;					      \
@@ -120,17 +113,17 @@ do_tunable_update_val (tunable_t *cur, const void *valp)
     {
     case TUNABLE_TYPE_INT_32:
 	{
-	  TUNABLE_SET_VAL_IF_VALID_RANGE (cur, val, int64_t, INT32_MIN, INT32_MAX);
+	  TUNABLE_SET_VAL_IF_VALID_RANGE (cur, val, int64_t);
 	  break;
 	}
     case TUNABLE_TYPE_UINT_64:
 	{
-	  TUNABLE_SET_VAL_IF_VALID_RANGE (cur, val, uint64_t, 0, UINT64_MAX);
+	  TUNABLE_SET_VAL_IF_VALID_RANGE (cur, val, uint64_t);
 	  break;
 	}
     case TUNABLE_TYPE_SIZE_T:
 	{
-	  TUNABLE_SET_VAL_IF_VALID_RANGE (cur, val, uint64_t, 0, SIZE_MAX);
+	  TUNABLE_SET_VAL_IF_VALID_RANGE (cur, val, uint64_t);
 	  break;
 	}
     case TUNABLE_TYPE_STRING:
diff --git a/scripts/gen-tunables.awk b/scripts/gen-tunables.awk
index ccdd0c6c71..622199061a 100644
--- a/scripts/gen-tunables.awk
+++ b/scripts/gen-tunables.awk
@@ -1,6 +1,14 @@
 # Generate dl-tunable-list.h from dl-tunables.list
 
 BEGIN {
+  min_of["STRING"]="0"
+  max_of["STRING"]="0"
+  min_of["INT_32"]="INT32_MIN"
+  max_of["INT_32"]="INT32_MAX"
+  min_of["UINT_64"]="0"
+  max_of["UINT_64"]="UINT64_MAX"
+  min_of["SIZE_T"]="0"
+  max_of["SIZE_T"]="SIZE_MAX"
   tunable=""
   ns=""
   top_ns=""
@@ -43,10 +51,10 @@ $1 == "}" {
       types[top_ns,ns,tunable] = "STRING"
     }
     if (!minvals[top_ns,ns,tunable]) {
-      minvals[top_ns,ns,tunable] = "0"
+      minvals[top_ns,ns,tunable] = min_of[types[top_ns,ns,tunable]]
     }
     if (!maxvals[top_ns,ns,tunable]) {
-      maxvals[top_ns,ns,tunable] = "0"
+      maxvals[top_ns,ns,tunable] = max_of[types[top_ns,ns,tunable]]
     }
     if (!env_alias[top_ns,ns,tunable]) {
       env_alias[top_ns,ns,tunable] = "NULL"