From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bart Van Assche Subject: [PATCH 31/47] IB/nes: Fix a race condition in nes_inetaddr_event() Date: Fri, 6 Oct 2017 14:33:17 -0700 Message-ID: <20171006213333.6721-32-bart.vanassche@wdc.com> References: <20171006213333.6721-1-bart.vanassche@wdc.com> Return-path: In-Reply-To: <20171006213333.6721-1-bart.vanassche-Sjgp3cTcYWE@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Doug Ledford Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Bart Van Assche , Faisal Latif List-Id: linux-rdma@vger.kernel.org This patch has been compile-tested only. Signed-off-by: Bart Van Assche Cc: Faisal Latif --- drivers/infiniband/hw/nes/nes.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/nes/nes.c b/drivers/infiniband/hw/nes/nes.c index ff58dfa071b8..42b68aa999fc 100644 --- a/drivers/infiniband/hw/nes/nes.c +++ b/drivers/infiniband/hw/nes/nes.c @@ -178,11 +178,16 @@ static int nes_inetaddr_event(struct notifier_block *notifier, /* fall through */ case NETDEV_CHANGEADDR: /* Add the address to the IP table */ - if (upper_dev) - nesvnic->local_ipaddr = - ((struct in_device *)upper_dev->ip_ptr)->ifa_list->ifa_address; - else + if (upper_dev) { + struct in_device *in; + + rcu_read_lock(); + in = __in_dev_get_rcu(upper_dev); + nesvnic->local_ipaddr = in->ifa_list->ifa_address; + rcu_read_unlock(); + } else { nesvnic->local_ipaddr = ifa->ifa_address; + } nes_write_indexed(nesdev, NES_IDX_DST_IP_ADDR+(0x10*PCI_FUNC(nesdev->pcidev->devfn)), -- 2.14.2 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html