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authorHangbin Liu <liuhangbin@gmail.com>2018-05-09 18:06:44 +0800
committerDavid S. Miller <davem@davemloft.net>2018-05-10 15:40:52 -0400
commit0e8411e426e277f55bd21e287ec89fab6f8eacae (patch)
tree3f99a701754cefcf8e0952ca78de9d9291fd5184 /net
parent55be9f25be1ca5bda75c39808fc77e42691bc07f (diff)
downloadlinux-0e8411e426e277f55bd21e287ec89fab6f8eacae.tar.bz2
ipv4: reset fnhe_mtu_locked after cache route flushed
After route cache is flushed via ipv4_sysctl_rtcache_flush(), we forget to reset fnhe_mtu_locked in rt_bind_exception(). When pmtu is updated in __ip_rt_update_pmtu(), it will return directly since the pmtu is still locked. e.g. + ip netns exec client ping 10.10.1.1 -c 1 -s 1400 -M do PING 10.10.1.1 (10.10.1.1) 1400(1428) bytes of data. >From 10.10.0.254 icmp_seq=1 Frag needed and DF set (mtu = 0) Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/route.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 1412a7baf0b9..29268efad247 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1375,6 +1375,7 @@ static bool rt_bind_exception(struct rtable *rt, struct fib_nh_exception *fnhe,
fnhe->fnhe_gw = 0;
fnhe->fnhe_pmtu = 0;
fnhe->fnhe_expires = 0;
+ fnhe->fnhe_mtu_locked = false;
fnhe_flush_routes(fnhe);
orig = NULL;
}