The patch below does not apply to the 3.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From eea40b8f624f25cbc02d55f2d93203f60cee9341 Mon Sep 17 00:00:00 2001 From: Paolo Abeni <pabeni@xxxxxxxxxx> Date: Fri, 28 Apr 2017 11:20:01 +0200 Subject: [PATCH] infiniband: call ipv6 route lookup via the stub interface 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) Cc: stable@xxxxxxxxxxxxxxx # 3.12+ Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx> Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx> diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c index 329d08c884f6..523d24320100 100644 --- a/drivers/infiniband/core/addr.c +++ b/drivers/infiniband/core/addr.c @@ -444,8 +444,8 @@ static int addr6_resolve(struct sockaddr_in6 *src_in, 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;