From 913cfa947d296bd0a0671e87f102a49c24683fd8 Mon Sep 17 00:00:00 2001 From: Duan Jiong Date: Thu, 27 Feb 2014 17:14:41 +0800 Subject: [PATCH] neigh: recompute reachabletime before returning from neigh_periodic_work() [ Upstream commit feff9ab2e7fa773b6a3965f77375fe89f7fd85cf ] If the neigh table's entries is less than gc_thresh1, the function will return directly, and the reachabletime will not be recompute, so the reachabletime can be guessed. Signed-off-by: Duan Jiong Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/neighbour.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 49aeab86f317..b49e8bafab17 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -764,9 +764,6 @@ static void neigh_periodic_work(struct work_struct *work) nht = rcu_dereference_protected(tbl->nht, lockdep_is_held(&tbl->lock)); - if (atomic_read(&tbl->entries) < tbl->gc_thresh1) - goto out; - /* * periodically recompute ReachableTime from random function */ @@ -779,6 +776,9 @@ static void neigh_periodic_work(struct work_struct *work) neigh_rand_reach_time(p->base_reachable_time); } + if (atomic_read(&tbl->entries) < tbl->gc_thresh1) + goto out; + for (i = 0 ; i < (1 << nht->hash_shift); i++) { np = &nht->hash_buckets[i]; -- 2.34.1