diff options
| author | Hangbin Liu <liuhangbin@gmail.com> | 2018-05-09 18:06:44 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-19 10:19:36 +0200 |
| commit | 973740db37fbe905872dd5f8cbb972db720aa58e (patch) | |
| tree | 24e87da49cf42622fb3a05d48c48ce26c06585b3 /net | |
| parent | 795df867dd8393136a19d7101199d8fe1c05cd22 (diff) | |
ipv4: reset fnhe_mtu_locked after cache route flushed
[ Upstream commit 0e8411e426e277f55bd21e287ec89fab6f8eacae ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/route.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 7270591e603e..df1c04d75f93 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1376,6 +1376,7 @@ 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; } |