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netfilter: ipset: Missing nfnl_lock()/nfnl_unlock() is added to ip_set_net_exit()

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Patch "netfilter: ipset: use nfnl_mutex_is_locked" is added the real
mutex locking check, which revealed the missing locking in ip_set_net_exit().

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Reported-by: syzbot+36b06f219f2439fe62e1@syzkaller.appspotmail.com
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Jozsef Kadlecsik 2018-01-06 15:24:18 +01:00 committed by Pablo Neira Ayuso
parent 4750005a85
commit f998b6b101
1 changed files with 2 additions and 0 deletions
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2
net/netfilter/ipset/ip_set_core.c
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@ -2078,6 +2078,7 @@ ip_set_net_exit(struct net *net)
inst->is_deleted = true; /* flag for ip_set_nfnl_put */
nfnl_lock(NFNL_SUBSYS_IPSET);
for (i = 0; i < inst->ip_set_max; i++) {
set = ip_set(inst, i);
if (set) {
@ -2085,6 +2086,7 @@ ip_set_net_exit(struct net *net)
ip_set_destroy_set(set);
}
}
nfnl_unlock(NFNL_SUBSYS_IPSET);
kfree(rcu_dereference_protected(inst->ip_set_list, 1));
}