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fib: add rtnl locking in ip_fib_net_exit
Daniel J Blueman reported a lockdep splat in trie_firstleaf(), caused by RTNL being not locked before a call to fib_table_flush() Reported-by: Daniel J Blueman <daniel.blueman@gmail.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1068,6 +1068,7 @@ static void ip_fib_net_exit(struct net *net)
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fib4_rules_exit(net);
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#endif
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rtnl_lock();
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for (i = 0; i < FIB_TABLE_HASHSZ; i++) {
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struct fib_table *tb;
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struct hlist_head *head;
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@ -1080,6 +1081,7 @@ static void ip_fib_net_exit(struct net *net)
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fib_free_table(tb);
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}
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}
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rtnl_unlock();
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kfree(net->ipv4.fib_table_hash);
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}
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