This is a note to let you know that I've just added the patch titled
vxlan: correctly handle ipv6.disable module parameter
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: vxlan-correctly-handle-ipv6.disable-module-parameter.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Thu Mar 22 14:40:23 CET 2018
From: Jiri Benc jbenc@redhat.com Date: Thu, 27 Apr 2017 21:24:35 +0200 Subject: vxlan: correctly handle ipv6.disable module parameter
From: Jiri Benc jbenc@redhat.com
[ Upstream commit d074bf9600443403aa24fbc12c1f18eadc90f5aa ]
When IPv6 is compiled but disabled at runtime, __vxlan_sock_add returns -EAFNOSUPPORT. For metadata based tunnels, this causes failure of the whole operation of bringing up the tunnel.
Ignore failure of IPv6 socket creation for metadata based tunnels caused by IPv6 not being available.
Fixes: b1be00a6c39f ("vxlan: support both IPv4 and IPv6 sockets in a single vxlan device") Signed-off-by: Jiri Benc jbenc@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/vxlan.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2816,17 +2816,21 @@ static int __vxlan_sock_add(struct vxlan
static int vxlan_sock_add(struct vxlan_dev *vxlan) { - bool ipv6 = vxlan->flags & VXLAN_F_IPV6; bool metadata = vxlan->flags & VXLAN_F_COLLECT_METADATA; + bool ipv6 = vxlan->flags & VXLAN_F_IPV6 || metadata; + bool ipv4 = !ipv6 || metadata; int ret = 0;
RCU_INIT_POINTER(vxlan->vn4_sock, NULL); #if IS_ENABLED(CONFIG_IPV6) RCU_INIT_POINTER(vxlan->vn6_sock, NULL); - if (ipv6 || metadata) + if (ipv6) { ret = __vxlan_sock_add(vxlan, true); + if (ret < 0 && ret != -EAFNOSUPPORT) + ipv4 = false; + } #endif - if (!ret && (!ipv6 || metadata)) + if (ipv4) ret = __vxlan_sock_add(vxlan, false); if (ret < 0) vxlan_sock_release(vxlan);
Patches currently in stable-queue which might be from jbenc@redhat.com are
queue-4.9/vxlan-correctly-handle-ipv6.disable-module-parameter.patch