From: Hangyu Hua hbh25y@gmail.com
[ Upstream commit c2e1cfefcac35e0eea229e148c8284088ce437b5 ]
tfilter_put need to be called to put the refount got by tp->ops->get to avoid possible refcount leak when chain->tmplt_ops != NULL and chain->tmplt_ops != tp->ops.
Fixes: 7d5509fa0d3d ("net: sched: extend proto ops with 'put' callback") Signed-off-by: Hangyu Hua hbh25y@gmail.com Reviewed-by: Vlad Buslov vladbu@nvidia.com Link: https://lore.kernel.org/r/20220921092734.31700-1-hbh25y@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/sched/cls_api.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 919c7fa5f02d..48a8c7daa635 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -2098,6 +2098,7 @@ static int tc_new_tfilter(struct sk_buff *skb, struct nlmsghdr *n, }
if (chain->tmplt_ops && chain->tmplt_ops != tp->ops) { + tfilter_put(tp, fh); NL_SET_ERR_MSG(extack, "Chain template is set to a different filter kind"); err = -EINVAL; goto errout;