Messages in this thread | | | Date | Wed, 07 Feb 2018 02:42:27 -0800 | Subject | Re: WARNING: proc registration bug in clusterip_tg_check | From | syzbot <> |
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> #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git > master
Can't find the corresponding bug.
> I can't reproduce the issue locally, so asking the syzbot to test the > tentive fix for me (and hoping I did not mess with the tag/format)
> --- > net/ipv4/netfilter/ipt_CLUSTERIP.c | 30 +++++++++++++++--------------- > 1 file changed, 15 insertions(+), 15 deletions(-)
> diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c > b/net/ipv4/netfilter/ipt_CLUSTERIP.c > index 3a84a60f6b39..db103cd971a9 100644 > --- a/net/ipv4/netfilter/ipt_CLUSTERIP.c > +++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c > @@ -230,17 +230,6 @@ clusterip_config_init(struct net *net, const struct > ipt_clusterip_tgt_info *i, > refcount_set(&c->refcount, 1); > refcount_set(&c->entries, 1);
> - spin_lock_bh(&cn->lock); > - if (__clusterip_config_find(net, ip)) { > - spin_unlock_bh(&cn->lock); > - kfree(c); > - > - return ERR_PTR(-EBUSY); > - } > - > - list_add_rcu(&c->list, &cn->configs); > - spin_unlock_bh(&cn->lock); > - > #ifdef CONFIG_PROC_FS > { > char buffer[16]; > @@ -257,20 +246,31 @@ clusterip_config_init(struct net *net, const struct > ipt_clusterip_tgt_info *i, > } > #endif
> + spin_lock_bh(&cn->lock); > + if (__clusterip_config_find(net, ip)) { > + spin_unlock_bh(&cn->lock); > + err = -EBUSY; > + goto err_remove_pte: > + } > + > + list_add_rcu(&c->list, &cn->configs); > + spin_unlock_bh(&cn->lock); > + > c->notifier.notifier_call = clusterip_netdev_event; > err = register_netdevice_notifier(&c->notifier); > if (!err) > return c;
> + spin_lock_bh(&cn->lock); > + list_del_rcu(&c->list); > + spin_unlock_bh(&cn->lock); > + > +err_remove_pte: > #ifdef CONFIG_PROC_FS > proc_remove(c->pde); > err: > #endif > - spin_lock_bh(&cn->lock); > - list_del_rcu(&c->list); > - spin_unlock_bh(&cn->lock); > kfree(c); > - > return ERR_PTR(err); > }
> -- > 2.14.3
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