From: Gustavo A. R. Silva <garsilva@embeddedor.com>
Date: Fri, 10 Mar 2017 21:39:32 +0000 (-0600)
Subject: usb: gadget: udc: remove pointer dereference after free
X-Git-Tag: v3.18.90~30
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc77cb865cfe83b1d7f412a49c6a8bc01a21e280;p=thirdparty%2Fkernel%2Fstable.git

usb: gadget: udc: remove pointer dereference after free


[ Upstream commit 1f459262b0e1649a1e5ad12fa4c66eb76c2220ce ]

Remove pointer dereference after free.

Addresses-Coverity-ID: 1091173
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/usb/gadget/udc/pch_udc.c b/drivers/usb/gadget/udc/pch_udc.c
index ccbe3d4a2a504..190b7103ae62d 100644
--- a/drivers/usb/gadget/udc/pch_udc.c
+++ b/drivers/usb/gadget/udc/pch_udc.c
@@ -1533,7 +1533,6 @@ 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;