linux-kernel - [PATCH] drivers: usb: gadget: udc: remove pointer dereference after free

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Message-ID: <20170208191549.GA3998@embeddedgus>
Date:   Wed, 8 Feb 2017 13:15:49 -0600
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     gregkh@...uxfoundation.org, balbi@...nel.org,
        andriy.shevchenko@...ux.intel.com, bhelgaas@...gle.com,
        heikki.krogerus@...ux.intel.com, mail@...oabal.eu,
        mina86@...a86.com
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drivers: usb: gadget: udc: remove pointer dereference after
 free

Remove pointer dereference and write after free.

Addresses-Coverity-ID: 1091173
Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
---
 drivers/usb/gadget/udc/pch_udc.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c
index a97da64..8a365aa 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -1523,7 +1523,6 @@ static void pch_udc_free_dma_chain(struct pch_udc_dev *dev,
 		td = phys_to_virt(addr);
 		addr2 = (dma_addr_t)td->next;
 		pci_pool_free(dev->data_requests, td, addr);
-		td->next = 0x00;
 		addr = addr2;
 	}
 	req->chain_len = 1;
-- 
2.5.0