netlink: floating point exception with concatenations

If the length is less than 1 byte, this codepath hits a floating point
exception, use div_round_up() as everywhere else in the code.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/netlink.c b/src/netlink.c
index bfa30502..00fac11d 100644
--- a/src/netlink.c
+++ b/src/netlink.c
@@ -371,7 +371,7 @@ static void netlink_gen_concat_data(const struct expr *expr,
 		list_for_each_entry(i, &expr->expressions, list) {
 			assert(i->ops->type == EXPR_VALUE);
 			mpz_export_data(data + offset, i->value, i->byteorder,
-					i->len / BITS_PER_BYTE);
+					div_round_up(i->len, BITS_PER_BYTE));
 			offset += netlink_padded_len(i->len) / BITS_PER_BYTE;
 		}