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authorHangbin Liu <liuhangbin@gmail.com>2020-05-28 10:15:13 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-30 02:56:53 +0300
commit96d10d5b192e7f064457fd957e6a3ce8c2dce4b4 (patch)
treebf1184fe334ca092ebf06a492c882d29db7e2251 /net/core/neighbour.c
parentf2b122d3d6ff2f2bef0f23e6cb2b56384da7f92a (diff)
downloadlinux-96d10d5b192e7f064457fd957e6a3ce8c2dce4b4.tar.xz
neigh: fix ARP retransmit timer guard
In commit 19e16d220f0a ("neigh: support smaller retrans_time settting") we add more accurate control for ARP and NS. But for ARP I forgot to update the latest guard in neigh_timer_handler(), then the next retransmit would be reset to jiffies + HZ/2 if we set the retrans_time less than 500ms. Fix it by setting the time_before() check to HZ/100. IPv6 does not have this issue. Reported-by: Jianwen Ji <jiji@redhat.com> Fixes: 19e16d220f0a ("neigh: support smaller retrans_time settting") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/neighbour.c')
-rw-r--r--net/core/neighbour.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 116139233d57..dbe0c6ead773 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1082,8 +1082,8 @@ static void neigh_timer_handler(struct timer_list *t)
}
if (neigh->nud_state & NUD_IN_TIMER) {
- if (time_before(next, jiffies + HZ/2))
- next = jiffies + HZ/2;
+ if (time_before(next, jiffies + HZ/100))
+ next = jiffies + HZ/100;
if (!mod_timer(&neigh->timer, next))
neigh_hold(neigh);
}