From: Hoang Le Date: Mon, 30 Nov 2020 02:55:44 +0000 (+0700) Subject: tipc: fix incompatible mtu of transmission X-Git-Tag: v5.9.13~25 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ecaeeb4b5acbb37ad3343a69a2c3e50a8d346aea;p=thirdparty%2Fkernel%2Fstable.git tipc: fix incompatible mtu of transmission [ Upstream commit 0643334902fcdc770e2d9555811200213339a3f6 ] In commit 682cd3cf946b6 ("tipc: confgiure and apply UDP bearer MTU on running links"), we introduced a function to change UDP bearer MTU and applied this new value across existing per-link. However, we did not apply this new MTU value at node level. This lead to packet dropped at link level if its size is greater than new MTU value. To fix this issue, we also apply this new MTU value for node level. Fixes: 682cd3cf946b6 ("tipc: confgiure and apply UDP bearer MTU on running links") Acked-by: Jon Maloy Signed-off-by: Hoang Le Link: https://lore.kernel.org/r/20201130025544.3602-1-hoang.h.le@dektech.com.au Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/tipc/node.c b/net/tipc/node.c index e4cf515e323f3..8c9c12072a784 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -2171,6 +2171,8 @@ void tipc_node_apply_property(struct net *net, struct tipc_bearer *b, else if (prop == TIPC_NLA_PROP_MTU) tipc_link_set_mtu(e->link, b->mtu); } + /* Update MTU for node link entry */ + e->mtu = tipc_link_mss(e->link); tipc_node_write_unlock(n); tipc_bearer_xmit(net, bearer_id, &xmitq, &e->maddr, NULL); }