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ipv6: sctp: fix lockdep splat in sctp_v6_get_dst() 

While cooking the sctp np->opt rcu fixes, I forgot to move
one rcu_read_unlock() after the added rcu_dereference() in
sctp_v6_get_dst()

This gave lockdep warnings reported by Dave Jones.

Fixes: c836a8ba93 ("ipv6: sctp: add rcu protection around np->opt")
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-12-07 08:25:21 -08:00 committed by David S. Miller
parent ce212d0f6f
commit 69ce6487dc
1 changed files with 1 additions and 2 deletions
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3
net/sctp/ipv6.c
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@ -323,14 +323,13 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
}
}
}
rcu_read_unlock();
if (baddr) {
fl6->saddr = baddr->v6.sin6_addr;
fl6->fl6_sport = baddr->v6.sin6_port;
final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &final);
dst = ip6_dst_lookup_flow(sk, fl6, final_p);
}
rcu_read_unlock();
out:
if (!IS_ERR_OR_NULL(dst)) {