linux-kernel - [PATCH] usb: gadget: bdc: fix memory leak

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Message-Id: <1443259866-28326-1-git-send-email-sudipm.mukherjee@gmail.com>
Date:	Sat, 26 Sep 2015 15:01:06 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH] usb: gadget: bdc: fix memory leak

If dma_pool_alloc() fails we are jumping to fail and releasing all the
bd_tables which have been added to the chain but we missed freeing this
bd_table which was just allocated and still not added to the chain of
bd_table.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---
 drivers/usb/gadget/udc/bdc/bdc_ep.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/bdc/bdc_ep.c b/drivers/usb/gadget/udc/bdc/bdc_ep.c
index d1b8153..97b7648 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_ep.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_ep.c
@@ -159,8 +159,10 @@ static int ep_bd_list_alloc(struct bdc_ep *ep)
 		bd_table->start_bd = dma_pool_alloc(bdc->bd_table_pool,
 							GFP_ATOMIC,
 							&dma);
-		if (!bd_table->start_bd)
+		if (!bd_table->start_bd) {
+			kfree(bd_table);
 			goto fail;
+		}
 
 		bd_table->dma = dma;
 
-- 
1.9.1

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