netfilter: ipset: Missing nfnl_lock()/nfnl_unlock() is added to ip_set_net_exit()
commit f998b6b101
upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
parent
ffebeb0d7c
commit
073e82701b
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@ -2055,6 +2055,7 @@ ip_set_net_exit(struct net *net)
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inst->is_deleted = true; /* flag for ip_set_nfnl_put */
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nfnl_lock(NFNL_SUBSYS_IPSET);
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for (i = 0; i < inst->ip_set_max; i++) {
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set = ip_set(inst, i);
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if (set) {
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@ -2062,6 +2063,7 @@ ip_set_net_exit(struct net *net)
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ip_set_destroy_set(set);
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}
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}
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nfnl_unlock(NFNL_SUBSYS_IPSET);
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kfree(rcu_dereference_protected(inst->ip_set_list, 1));
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}
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