diff mbox

expr: call expr->ops->snprintf only if defined

Message ID 1480452044-9926-1-git-send-email-pablo@netfilter.org
State Accepted
Delegated to: Pablo Neira
Headers show

Commit Message

Pablo Neira Ayuso Nov. 29, 2016, 8:40 p.m. UTC 
The notrack expression comes with no ->ops->snprintf, so skip this from
nftnl_expr_snprintf() if not set.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 src/expr.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox

Patch

diff --git a/src/expr.c b/src/expr.c
index 2779b3c42217..8d5c56206867 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -281,6 +281,9 @@  int nftnl_expr_snprintf(char *buf, size_t size, const struct nftnl_expr *expr,
 	int ret;
 	unsigned int offset = 0, len = size;
 
+	if (!expr->ops->snprintf)
+		return 0;
+
 	ret = expr->ops->snprintf(buf+offset, len, type, flags, expr);
 	SNPRINTF_BUFFER_SIZE(ret, size, len, offset);