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

i40iw: Receive netdev events post INET_NOTIFIER state

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: i40iw-receive-netdev-events-post-inet_notifier-state.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 Dec 21 09:02:40 CET 2017

From: Shiraz Saleem shiraz.saleem@intel.com Date: Fri, 17 Mar 2017 18:30:07 -0500 Subject: i40iw: Receive netdev events post INET_NOTIFIER state

From: Shiraz Saleem shiraz.saleem@intel.com

[ Upstream commit 871a8623d3b40221ad1103aff715dfee0aa4dacf ]

Netdev notification events are de-registered only when all client iwdev instances are removed. If a single client is closed and re-opened, netdev events could arrive even before the Control Queue-Pair (CQP) is created, causing a NULL pointer dereference crash in i40iw_get_cqp_request. Fix this by allowing netdev event notification only after we have reached the INET_NOTIFIER state with respect to device initialization.

Reported-by: Stefan Assmann sassmann@redhat.com Signed-off-by: Shiraz Saleem shiraz.saleem@intel.com Reviewed-by: Yuval Shaia yuval.shaia@oracle.com Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/infiniband/hw/i40iw/i40iw_utils.c | 8 ++++++++ 1 file changed, 8 insertions(+)

--- a/drivers/infiniband/hw/i40iw/i40iw_utils.c +++ b/drivers/infiniband/hw/i40iw/i40iw_utils.c @@ -159,6 +159,9 @@ int i40iw_inetaddr_event(struct notifier return NOTIFY_DONE;

iwdev = &hdl->device; + if (iwdev->init_state < INET_NOTIFIER) + return NOTIFY_DONE; + netdev = iwdev->ldev->netdev; upper_dev = netdev_master_upper_dev_get(netdev); if (netdev != event_netdev) @@ -231,6 +234,9 @@ int i40iw_inet6addr_event(struct notifie return NOTIFY_DONE;

iwdev = &hdl->device; + if (iwdev->init_state < INET_NOTIFIER) + return NOTIFY_DONE; + netdev = iwdev->ldev->netdev; if (netdev != event_netdev) return NOTIFY_DONE; @@ -280,6 +286,8 @@ int i40iw_net_event(struct notifier_bloc if (!iwhdl) return NOTIFY_DONE; iwdev = &iwhdl->device; + if (iwdev->init_state < INET_NOTIFIER) + return NOTIFY_DONE; p = (__be32 *)neigh->primary_key; i40iw_copy_ip_ntohl(local_ipaddr, p); if (neigh->nud_state & NUD_VALID) {

Patches currently in stable-queue which might be from shiraz.saleem@intel.com are

queue-4.9/i40iw-receive-netdev-events-post-inet_notifier-state.patch