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

lan78xx: Crash in lan78xx_writ_reg (Workqueue: events lan78xx_deferred_multicast_write)

to the 4.14-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: lan78xx-crash-in-lan78xx_writ_reg-workqueue-events-lan78xx_deferred_multicast_write.patch and it can be found in the queue-4.14 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 Tue Apr 10 23:20:08 CEST 2018

From: Raghuram Chary J raghuramchary.jallipalli@microchip.com Date: Tue, 27 Mar 2018 14:51:16 +0530 Subject: lan78xx: Crash in lan78xx_writ_reg (Workqueue: events lan78xx_deferred_multicast_write)

From: Raghuram Chary J raghuramchary.jallipalli@microchip.com

[ Upstream commit 2d2d99ec13f62d5d2cecb6169dfdb6bbe05356d0 ]

Description: Crash was reported with syzkaller pointing to lan78xx_write_reg routine.

Root-cause: Proper cleanup of workqueues and init/setup routines was not happening in failure conditions.

Fix: Handled the error conditions by cleaning up the queues and init/setup routines.

Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver") Reported-by: Andrey Konovalov andreyknvl@google.com Signed-off-by: Raghuram Chary J raghuramchary.jallipalli@microchip.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/usb/lan78xx.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-)

--- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2863,8 +2863,7 @@ static int lan78xx_bind(struct lan78xx_n if (ret < 0) { netdev_warn(dev->net, "lan78xx_setup_irq_domain() failed : %d", ret); - kfree(pdata); - return ret; + goto out1; }

dev->net->hard_header_len += TX_OVERHEAD; @@ -2872,14 +2871,32 @@ static int lan78xx_bind(struct lan78xx_n

/* Init all registers */ ret = lan78xx_reset(dev); + if (ret) { + netdev_warn(dev->net, "Registers INIT FAILED...."); + goto out2; + }

ret = lan78xx_mdio_init(dev); + if (ret) { + netdev_warn(dev->net, "MDIO INIT FAILED....."); + goto out2; + }

dev->net->flags |= IFF_MULTICAST;

pdata->wol = WAKE_MAGIC;

return ret; + +out2: + lan78xx_remove_irq_domain(dev); + +out1: + netdev_warn(dev->net, "Bind routine FAILED"); + cancel_work_sync(&pdata->set_multicast); + cancel_work_sync(&pdata->set_vlan); + kfree(pdata); + return ret; }

static void lan78xx_unbind(struct lan78xx_net *dev, struct usb_interface *intf) @@ -2891,6 +2908,8 @@ static void lan78xx_unbind(struct lan78x lan78xx_remove_mdio(dev);

if (pdata) { + cancel_work_sync(&pdata->set_multicast); + cancel_work_sync(&pdata->set_vlan); netif_dbg(dev, ifdown, dev->net, "free pdata"); kfree(pdata); pdata = NULL;

Patches currently in stable-queue which might be from raghuramchary.jallipalli@microchip.com are

queue-4.14/lan78xx-crash-in-lan78xx_writ_reg-workqueue-events-lan78xx_deferred_multicast_write.patch