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authorDavid S. Miller <davem@davemloft.net>2008-02-17 18:39:54 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-17 18:39:54 -0800
commit9ff566074689e3aed1488780b97714ec43ba361d (patch)
tree10bfc8ab214696ba08e5e25018d24c3de8018801 /net/ipv4/arp.c
parent93b2d4a208eeb19bff95e98c34503ce4b03cd0f9 (diff)
Revert "[NDISC]: Fix race in generic address resolution"
This reverts commit 69cc64d8d92bf852f933e90c888dfff083bd4fc9. It causes recursive locking in IPV6 because unlike other neighbour layer clients, it even needs neighbour cache entries to send neighbour soliciation messages :-( We'll have to find another way to fix this race. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/arp.c')
-rw-r--r--net/ipv4/arp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index c663fa5339ee..8e17f65f4002 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -368,6 +368,7 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)
if (!(neigh->nud_state&NUD_VALID))
printk(KERN_DEBUG "trying to ucast probe in NUD_INVALID\n");
dst_ha = neigh->ha;
+ read_lock_bh(&neigh->lock);
} else if ((probes -= neigh->parms->app_probes) < 0) {
#ifdef CONFIG_ARPD
neigh_app_ns(neigh);
@@ -377,6 +378,8 @@ static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)
arp_send(ARPOP_REQUEST, ETH_P_ARP, target, dev, saddr,
dst_ha, dev->dev_addr, NULL);
+ if (dst_ha)
+ read_unlock_bh(&neigh->lock);
}
static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip)

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