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lib: fix crash when iterating over nb operational data

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Example:
```
show yang operational-data /frr-routing:routing/control-plane-protocols/control-plane-protocol[type='frr-staticd:staticd'][name='staticd'][vrf='default'] staticd
```

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
This commit is contained in:
Igor Ryzhov 2021-02-26 19:17:28 +03:00
parent 30b3fb20d4
commit baa1d4aff6
1 changed files with 10 additions and 0 deletions
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10
lib/northbound.c
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@ -1817,6 +1817,16 @@ int nb_oper_data_iterate(const char *xpath, struct yang_translator *translator,
/* Find the list entry pointer. */
nn = dn->schema->priv;
if (!nn->cbs.lookup_entry) {
flog_warn(
EC_LIB_NB_OPERATIONAL_DATA,
"%s: data path doesn't support iteration over operational data: %s",
__func__, xpath);
list_delete(&list_dnodes);
yang_dnode_free(dnode);
return NB_ERR;
}
list_entry =
nb_callback_lookup_entry(nn, list_entry, &list_keys);
if (list_entry == NULL) {