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netfilter: ipset: use nfnl_mutex_is_locked

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Check that we really hold nfnl mutex here instead of relying on correct
usage alone.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2017-11-30 21:07:32 +01:00 committed by Pablo Neira Ayuso
parent 6b3d933000
commit 49971b8853
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/ipset/ip_set_core.c
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@ -57,7 +57,7 @@ MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET);
/* When the nfnl mutex is held: */
#define ip_set_dereference(p) \
rcu_dereference_protected(p, 1)
rcu_dereference_protected(p, lockdep_nfnl_is_held(NFNL_SUBSYS_IPSET))
#define ip_set(inst, id) \
ip_set_dereference((inst)->ip_set_list)[id]