Set declaration + set flush results in a crash because CMD_OBJ_SETELEMS does not expect no elements. This internal command only shows up if set contains elements, however, evaluation flushes set content after the set expansion. Skip this command CMD_OBJ_SETELEMS if set is empty. Fixes: d3c8051cb767 ("rule: rework CMD_OBJ_SETELEMS logic") Signed-off-by: Pablo Neira Ayuso --- src/rule.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/rule.c b/src/rule.c index 05b570cda279..bede68fa1549 100644 --- a/src/rule.c +++ b/src/rule.c @@ -1504,6 +1504,9 @@ static int do_add_setelems(struct netlink_ctx *ctx, struct cmd *cmd, { struct set *set = cmd->set; + if (!set->init) + return 0; + return __do_add_elements(ctx, cmd, set, set->init, flags); } -- 2.30.2