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cls_flower: Fix incorrect idr release when failing to modify rule 

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: fe2502e49b ("net_sched: remove cls_flower idr on failure")
Reported-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Blakey 2018-05-30 11:29:15 +03:00 committed by David S. Miller
parent 26de0b76d9
commit 8258d2da9f
1 changed files with 1 additions and 1 deletions
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2
net/sched/cls_flower.c
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@ -977,7 +977,7 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
return 0; return 0;
errout_idr: errout_idr:
if (fnew->handle) if (!fold)
idr_remove(&head->handle_idr, fnew->handle); idr_remove(&head->handle_idr, fnew->handle);
errout: errout:
tcf_exts_destroy(&fnew->exts); tcf_exts_destroy(&fnew->exts);