1 files changed, 37 insertions, 6 deletions

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 6dae81d65d5c..3a4b29a13d31 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -3012,6 +3012,8 @@ devlink_param_value_get_from_info(const struct devlink_param *param,
                                   struct genl_info *info,
                                   union devlink_param_value *value)
 {
+        int len;
+
         if (param->type != DEVLINK_PARAM_TYPE_BOOL &&
             !info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA])
                 return -EINVAL;
@@ -3027,10 +3029,13 @@ devlink_param_value_get_from_info(const struct devlink_param *param,
                 value->vu32 = nla_get_u32(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
                 break;
         case DEVLINK_PARAM_TYPE_STRING:
-                if (nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) >
-                    DEVLINK_PARAM_MAX_STRING_VALUE)
+                len = strnlen(nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]),
+                              nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
+                if (len == nla_len(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]) ||
+                    len >= __DEVLINK_PARAM_MAX_STRING_VALUE)
                         return -EINVAL;
-                value->vstr = nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]);
+                strcpy(value->vstr,
+                       nla_data(info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA]));
                 break;
         case DEVLINK_PARAM_TYPE_BOOL:
                 value->vbool = info->attrs[DEVLINK_ATTR_PARAM_VALUE_DATA] ?
@@ -3117,7 +3122,10 @@ static int devlink_nl_cmd_param_set_doit(struct sk_buff *skb,
                 return -EOPNOTSUPP;
 
         if (cmode == DEVLINK_PARAM_CMODE_DRIVERINIT) {
-                param_item->driverinit_value = value;
+                if (param->type == DEVLINK_PARAM_TYPE_STRING)
+                        strcpy(param_item->driverinit_value.vstr, value.vstr);
+                else
+                        param_item->driverinit_value = value;
                 param_item->driverinit_value_valid = true;
         } else {
                 if (!param->set)
@@ -4557,7 +4565,10 @@ int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
                 return -EOPNOTSUPP;
 
-        *init_val = param_item->driverinit_value;
+        if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
+                strcpy(init_val->vstr, param_item->driverinit_value.vstr);
+        else
+                *init_val = param_item->driverinit_value;
 
         return 0;
 }
@@ -4588,7 +4599,10 @@ int devlink_param_driverinit_value_set(struct devlink *devlink, u32 param_id,
                                               DEVLINK_PARAM_CMODE_DRIVERINIT))
                 return -EOPNOTSUPP;
 
-        param_item->driverinit_value = init_val;
+        if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
+                strcpy(param_item->driverinit_value.vstr, init_val.vstr);
+        else
+                param_item->driverinit_value = init_val;
         param_item->driverinit_value_valid = true;
 
         devlink_param_notify(devlink, param_item, DEVLINK_CMD_PARAM_NEW);
@@ -4621,6 +4635,23 @@ void devlink_param_value_changed(struct devlink *devlink, u32 param_id)
 EXPORT_SYMBOL_GPL(devlink_param_value_changed);
 
 /**
+ *      devlink_param_value_str_fill - Safely fill-up the string preventing
+ *                                     from overflow of the preallocated buffer
+ *
+ *      @dst_val: destination devlink_param_value
+ *      @src: source buffer
+ */
+void devlink_param_value_str_fill(union devlink_param_value *dst_val,
+                                  const char *src)
+{
+        size_t len;
+
+        len = strlcpy(dst_val->vstr, src, __DEVLINK_PARAM_MAX_STRING_VALUE);
+        WARN_ON(len >= __DEVLINK_PARAM_MAX_STRING_VALUE);
+}
+EXPORT_SYMBOL_GPL(devlink_param_value_str_fill);
+
+/**
  *      devlink_region_create - create a new address region
  *
  *      @devlink: devlink