[PATCH] drivers: net: remove a dangling pointer in peak_usb_create_dev

[Dongliang Mu]

From: Dongliang Mu <mudongliangabcd@xxxxxxxxx>

The error handling code of peak_usb_create_dev forgets to reset the
next_siblings of previous entry.

Fix this by nullifying the (dev->prev_siblings)->next_siblings in the
error handling code.

Signed-off-by: Dongliang Mu <mudongliangabcd@xxxxxxxxx>
---
 drivers/net/can/usb/peak_usb/pcan_usb_core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
index b850ff8fe4bd..f858810221b6 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
@@ -894,6 +894,9 @@ static int peak_usb_create_dev(const struct peak_usb_adapter *peak_usb_adapter,
 		dev->adapter->dev_free(dev);
 
 lbl_unregister_candev:
+	/* remove the dangling pointer in next_siblings */
+	if (dev->prev_siblings)
+		(dev->prev_siblings)->next_siblings = NULL;
 	unregister_candev(netdev);
 
 lbl_restore_intf_data:
-- 
2.25.1