Patch "infiniband: call ipv6 route lookup via the stub interface" has been added to the 4.9-stable tree

Patch "infiniband: call ipv6 route lookup via the stub interface" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    infiniband: call ipv6 route lookup via the stub interface

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     infiniband-call-ipv6-route-lookup-via-the-stub-interface.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 eea40b8f624f25cbc02d55f2d93203f60cee9341 Mon Sep 17 00:00:00 2001
From: Paolo Abeni <pabeni@redhat.com>
Date: Fri, 28 Apr 2017 11:20:01 +0200
Subject: infiniband: call ipv6 route lookup via the stub interface

From: Paolo Abeni <pabeni@redhat.com>

commit eea40b8f624f25cbc02d55f2d93203f60cee9341 upstream.

The infiniband address handle can be triggered to resolve an ipv6
address in response to MAD packets, regardless of the ipv6
module being disabled via the kernel command line argument.

That will cause a call into the ipv6 routing code, which is not
initialized, and a conseguent oops.

This commit addresses the above issue replacing the direct lookup
call with an indirect one via the ipv6 stub, which is properly
initialized according to the ipv6 status (e.g. if ipv6 is
disabled, the routing lookup fails gracefully)

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/core/addr.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -444,8 +444,8 @@ static int addr6_resolve(struct sockaddr
 	fl6.saddr = src_in->sin6_addr;
 	fl6.flowi6_oif = addr->bound_dev_if;
 
-	dst = ip6_route_output(addr->net, NULL, &fl6);
-	if ((ret = dst->error))
+	ret = ipv6_stub->ipv6_dst_lookup(addr->net, NULL, &dst, &fl6);
+	if (ret < 0)
 		goto put;
 
 	rt = (struct rt6_info *)dst;


Patches currently in stable-queue which might be from pabeni@redhat.com are

queue-4.9/infiniband-call-ipv6-route-lookup-via-the-stub-interface.patch