[PATCH libnftnl] src: don't set data_len to zero when returning pointers

[PATCH libnftnl] src: don't set data_len to zero when returning pointers

[Pablo Neira Ayuso]

nft already assumes that passing NULL as data_len is valid, otherwise
it crashes. Fix this by leave data_len unset in this specific case.

Fixes: bda7102 ("src: Fix nftnl_*_get_data() to return the real attribute length")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/expr/dynset.c | 1 -
 src/set_elem.c    | 1 -
 2 files changed, 2 deletions(-)

diff --git a/src/expr/dynset.c b/src/expr/dynset.c
index 111bf8c..0eaa409 100644
--- a/src/expr/dynset.c
+++ b/src/expr/dynset.c
@@ -94,7 +94,6 @@ nftnl_expr_dynset_get(const struct nftnl_expr *e, uint16_t type,
 		*data_len = sizeof(dynset->set_id);
 		return &dynset->set_id;
 	case NFTNL_EXPR_DYNSET_EXPR:
-		*data_len = 0;
 		return dynset->expr;
 	}
 	return NULL;
diff --git a/src/set_elem.c b/src/set_elem.c
index 4e89210..7908661 100644
--- a/src/set_elem.c
+++ b/src/set_elem.c
@@ -184,7 +184,6 @@ const void *nftnl_set_elem_get(struct nftnl_set_elem *s, uint16_t attr, uint32_t
 		*data_len = s->user.len;
 		return s->user.data;
 	case NFTNL_SET_ELEM_EXPR:
-		*data_len = 0;
 		return s->expr;
 	}
 	return NULL;
-- 
2.1.4