Patch "net: thunder: Check for driver data in nicvf_remove()" has been added to the 4.2-stable tree

[<gregkh@linuxfoundation.org>]

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

    net: thunder: Check for driver data in nicvf_remove()

to the 4.2-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:
     net-thunder-check-for-driver-data-in-nicvf_remove.patch
and it can be found in the queue-4.2 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 Fri Dec 11 11:38:35 EST 2015
From: Pavel Fedin <p.fedin@samsung.com>
Date: Mon, 16 Nov 2015 17:51:34 +0300
Subject: net: thunder: Check for driver data in nicvf_remove()

From: Pavel Fedin <p.fedin@samsung.com>

[ Upstream commit 7750130d93decff06120df0d8ea024ff8a038a21 ]

In some cases the crash is caused by nicvf_remove() being called from
outside. For example, if we try to feed the device to vfio after the
probe has failed for some reason. So, move the check to better place.

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/cavium/thunder/nicvf_main.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -1325,7 +1325,12 @@ err_disable_device:
 static void nicvf_remove(struct pci_dev *pdev)
 {
 	struct net_device *netdev = pci_get_drvdata(pdev);
-	struct nicvf *nic = netdev_priv(netdev);
+	struct nicvf *nic;
+
+	if (!netdev)
+		return;
+
+	nic = netdev_priv(netdev);
 
 	unregister_netdev(netdev);
 	nicvf_unregister_interrupts(nic);


Patches currently in stable-queue which might be from p.fedin@samsung.com are

queue-4.2/net-thunder-check-for-driver-data-in-nicvf_remove.patch