4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Paul Blakey <paulb@xxxxxxxxxxxx>
[ Upstream commit 8258d2da9f9f521dce7019e018360c28d116354e ]
When we fail to modify a rule, we incorrectly release the idr handle
of the unmodified old rule.
Fix that by checking if we need to release it.
Fixes: fe2502e49b58 ("net_sched: remove cls_flower idr on failure")
Reported-by: Vlad Buslov <vladbu@xxxxxxxxxxxx>
Reviewed-by: Roi Dayan <roid@xxxxxxxxxxxx>
Acked-by: Jiri Pirko <jiri@xxxxxxxxxxxx>
Signed-off-by: Paul Blakey <paulb@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/sched/cls_flower.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -1007,7 +1007,7 @@ static int fl_change(struct net *net, st
return 0;
errout_idr:
- if (fnew->handle)
+ if (!fold)
idr_remove_ext(&head->handle_idr, fnew->handle);
errout:
tcf_exts_destroy(&fnew->exts);
