4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Raghuram Chary J <raghuramchary.jallipalli@xxxxxxxxxxxxx>
[ 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@xxxxxxxxxx>
Signed-off-by: Raghuram Chary J <raghuramchary.jallipalli@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;