linux-kernel - [PATCH AUTOSEL 4.14 6/6] usb: gadget: udc: fix NULL dereference in remove()

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Message-Id: <20230615114016.649846-6-sashal@kernel.org>
Date:   Thu, 15 Jun 2023 07:40:14 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dan Carpenter <dan.carpenter@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, linux-usb@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 6/6] usb: gadget: udc: fix NULL dereference in remove()

From: Dan Carpenter <dan.carpenter@...aro.org>

[ Upstream commit 016da9c65fec9f0e78c4909ed9a0f2d567af6775 ]

The "udc" pointer was never set in the probe() function so it will
lead to a NULL dereference in udc_pci_remove() when we do:

	usb_del_gadget_udc(&udc->gadget);

Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
Link: https://lore.kernel.org/r/ZG+A/dNpFWAlCChk@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/usb/gadget/udc/amd5536udc_pci.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/udc/amd5536udc_pci.c b/drivers/usb/gadget/udc/amd5536udc_pci.c
index 73413c1211cbd..8849fc3030bd2 100644
--- a/drivers/usb/gadget/udc/amd5536udc_pci.c
+++ b/drivers/usb/gadget/udc/amd5536udc_pci.c
@@ -175,6 +175,9 @@ static int udc_pci_probe(
 		retval = -ENODEV;
 		goto err_probe;
 	}
+
+	udc = dev;
+
 	return 0;
 
 err_probe:
-- 
2.39.2