linux-kernel - [PATCH] misc: genwqe: Fix potential memory leak when pinning memory

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Date:	Sat, 25 Jan 2014 22:47:44 +0100
From:	Christian Engelmayer <cengelma@....at>
To:	Frank Haverkamp <haver@...ux.vnet.ibm.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] misc: genwqe: Fix potential memory leak when pinning memory

Fix a memory leak in the genwqe_pin_mem() error path as called by
ioctl GENWQE_PIN_MEM. In case there is an error encountered when
mapping memory, the already allocated dma_mapping struct needs to
be freed correctly.

Detected by Coverity: CID 1162606.

Signed-off-by: Christian Engelmayer <cengelma@....at>
---
 drivers/misc/genwqe/card_dev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/misc/genwqe/card_dev.c b/drivers/misc/genwqe/card_dev.c
index 8f8a6b3..2c2c9cc 100644
--- a/drivers/misc/genwqe/card_dev.c
+++ b/drivers/misc/genwqe/card_dev.c
@@ -787,6 +787,7 @@ static int genwqe_pin_mem(struct genwqe_file *cfile, struct genwqe_mem *m)
 	if (rc != 0) {
 		dev_err(&pci_dev->dev,
 			"[%s] genwqe_user_vmap rc=%d\n", __func__, rc);
+		kfree(dma_map);
 		return rc;
 	}
 
-- 
1.8.3.2
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