ndisc: Update neigh->updated with write lock.
neigh->nud_state and neigh->updated are under protection of neigh->lock. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -499,22 +499,26 @@ static void rt6_probe(struct rt6_info *rt)
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* to no more than one per minute.
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*/
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neigh = rt ? rt->n : NULL;
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if (!neigh || (neigh->nud_state & NUD_VALID))
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if (!neigh)
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return;
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read_lock_bh(&neigh->lock);
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write_lock_bh(&neigh->lock);
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if (neigh->nud_state & NUD_VALID) {
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write_unlock_bh(&neigh->lock);
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return;
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}
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if (!(neigh->nud_state & NUD_VALID) &&
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time_after(jiffies, neigh->updated + rt->rt6i_idev->cnf.rtr_probe_interval)) {
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struct in6_addr mcaddr;
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struct in6_addr *target;
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neigh->updated = jiffies;
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read_unlock_bh(&neigh->lock);
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write_unlock_bh(&neigh->lock);
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target = (struct in6_addr *)&neigh->primary_key;
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addrconf_addr_solict_mult(target, &mcaddr);
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ndisc_send_ns(rt->dst.dev, NULL, target, &mcaddr, NULL);
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} else {
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read_unlock_bh(&neigh->lock);
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write_unlock_bh(&neigh->lock);
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}
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}
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#else
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