Linux-USB Archive on lore.kernel.org
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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sven Van Asbroeck <thesven73@gmail.com>,
	Tony Lindgren <tony@atomide.com>, Bin Liu <b-liu@ti.com>,
	Sven Van Asbroeck <TheSven73@gmail.com>,
	Felipe Balbi <felipe.balbi@linux.intel.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-usb@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 181/671] usb: phy: twl6030-usb: fix possible use-after-free on remove
Date: Thu, 16 Jan 2020 11:51:30 -0500
Message-ID: <20200116165940.10720-64-sashal@kernel.org> (raw)
In-Reply-To: <20200116165940.10720-1-sashal@kernel.org>

From: Sven Van Asbroeck <thesven73@gmail.com>

[ Upstream commit 5895d311d28f2605e2f71c1a3e043ed38f3ac9d2 ]

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@atomide.com>
Cc: Bin Liu <b-liu@ti.com>
Fixes: b6a619a883c3 ("usb: phy: Check initial state for twl6030")
Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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);
 	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
 		REG_INT_MSK_LINE_C);
 	twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
-- 
2.20.1


       reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116165940.10720-1-sashal@kernel.org>
2020-01-16 16:51 ` Sasha Levin [this message]
2020-01-16 16:51 ` [PATCH AUTOSEL 4.19 195/671] cdc-wdm: pass return value of recover_from_urb_loss Sasha Levin

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