[PATCH] usb: phy: twl6030-usb: fix possible use-after-free on remove

From: Sven Van Asbroeck
Date: Mon Feb 11 2019 - 10:21:08 EST

In remove(), use cancel_delayed_work_sync() to cancel the
delayed work. Otherwise there's a chance that this work
will continue to run until after the device has been removed.

This issue was detected with the help of Coccinelle.

Cc: Tony Lindgren <tony@xxxxxxxxxxx>
Cc: Bin Liu <b-liu@xxxxxx>
Fixes: b6a619a883c3 ("usb: phy: Check initial state for twl6030")
Signed-off-by: Sven Van Asbroeck <TheSven73@xxxxxxxxx>
drivers/usb/phy/phy-twl6030-usb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/phy/phy-twl6030-usb.c b/drivers/usb/phy/phy-twl6030-usb.c
index 183550b63faa..dade34d70419 100644
--- a/drivers/usb/phy/phy-twl6030-usb.c
+++ b/drivers/usb/phy/phy-twl6030-usb.c
@@ -400,7 +400,7 @@ static int twl6030_usb_remove(struct platform_device *pdev)
struct twl6030_usb *twl = platform_get_drvdata(pdev);

- cancel_delayed_work(&twl->get_status_work);
+ cancel_delayed_work_sync(&twl->get_status_work);