BUGFIX NULL variable dereference

Author: rkrejci

src/parser.c

@@ -1718,7 +1718,7 @@ lyp_parse_value(struct lys_type *type, const char **value_, struct lyxml_elem *x
              tpdf = tpdf->type.der);
         if (tpdf->module && xml) {
             /* convert value into the json format */
-            value = transform_xml2json(ctx, value, xml, 1, 1);
+            value = transform_xml2json(ctx, value ? value : "", xml, 1, 1);
             if (!value) {
                 /* invalid instance-identifier format */
                 if (leaf) {

src/tree_data.c

@@ -5811,8 +5811,10 @@ lyd_dup_withsiblings_r(const struct lyd_node *first, struct lyd_node *parent_dup
 
 error:
     /* disconnect and free */
-    first_dup->parent = NULL;
-    lyd_free_withsiblings(first_dup);
+    if (first_dup) {
+        first_dup->parent = NULL;
+        lyd_free_withsiblings(first_dup);
+    }
     return NULL;
 }
 

src/xpath.c

@@ -6808,7 +6808,7 @@ moveto_op_math(struct lyxp_set *set1, struct lyxp_set *set2, const char *op, str
         break;
 
     default:
-        LOGINT(local_mod->ctx);
+        LOGINT(local_mod ? local_mod->ctx : NULL);
         return -1;
     }
 
@@ -6962,7 +6962,7 @@ eval_node_test(struct lyxp_expr *exp, uint16_t *exp_idx, struct lyd_node *cur_no
         break;
 
     default:
-        LOGINT(local_mod->ctx);
+        LOGINT(local_mod ? local_mod->ctx : NULL);
         return -1;
     }
 
@@ -7239,7 +7239,7 @@ eval_relative_location_path(struct lyxp_expr *exp, uint16_t *exp_idx, struct lyd
             break;
 
         default:
-            LOGINT(local_mod->ctx);
+            LOGINT(local_mod ? local_mod->ctx : NULL);
             return -1;
         }
     } while ((exp->used > *exp_idx) && (exp->tokens[*exp_idx] == LYXP_TOKEN_OPERATOR_PATH));
@@ -8661,7 +8661,7 @@ lyxp_set_cast(struct lyxp_set *set, enum lyxp_set_type target, const struct lyd_
             LY_CHECK_ERR_RETURN(!set->val.str, LOGMEM(local_mod->ctx), -1);
             break;
         default:
-            LOGINT(local_mod->ctx);
+            LOGINT(local_mod ? local_mod->ctx : NULL);
             return -1;
         }
         set->type = LYXP_SET_STRING;
@@ -8683,7 +8683,7 @@ lyxp_set_cast(struct lyxp_set *set, enum lyxp_set_type target, const struct lyd_
             }
             break;
         default:
-            LOGINT(local_mod->ctx);
+            LOGINT(local_mod ? local_mod->ctx : NULL);
             return -1;
         }
         set->type = LYXP_SET_NUMBER;
@@ -8718,7 +8718,7 @@ lyxp_set_cast(struct lyxp_set *set, enum lyxp_set_type target, const struct lyd_
             set->val.bool = 0;
             break;
         default:
-            LOGINT(local_mod->ctx);
+            LOGINT(local_mod ? local_mod->ctx : NULL);
             return -1;
         }
         set->type = LYXP_SET_BOOLEAN;