linux-kernel - [PATCH AUTOSEL for 4.9 022/100] usb: gadget: udc: remove pointer dereference after free

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Message-ID: <20171213015606.6568-22-alexander.levin@verizon.com>
Date:   Wed, 13 Dec 2017 01:56:19 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.9 022/100] usb: gadget: udc: remove pointer
 dereference after free

From: "Gustavo A. R. Silva" <garsilva@...eddedor.com>

[ Upstream commit 1f459262b0e1649a1e5ad12fa4c66eb76c2220ce ]

Remove pointer dereference after free.

Addresses-Coverity-ID: 1091173
Acked-by: Michal Nazarewicz <mina86@...a86.com>
Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.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 a97da645c1b9..8a365aad66fe 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;
-- 
2.11.0