[PATCH 4.9 27/59] usb: gadget: fotg210-udc: Fix memory leak of fotg210->ep[i]

Greg Kroah-Hartman
2018-10-08T18:39:11Z

From: Anton Vasilyev <vasilyev@ispras.ru>

[ Upstream commit c37bd52836296ecc9a0fc8060b819089aebdbcde ]

There is no deallocation of fotg210->ep[i] elements, allocated at
fotg210_udc_probe.

The patch adds deallocation of fotg210->ep array elements and simplifies
error path of fotg210_udc_probe().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/gadget/udc/fotg210-udc.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)

--- a/drivers/usb/gadget/udc/fotg210-udc.c
+++ b/drivers/usb/gadget/udc/fotg210-udc.c
@@ -1066,12 +1066,15 @@ static struct usb_gadget_ops fotg210_gad
static int fotg210_udc_remove(struct platform_device *pdev)
{
struct fotg210_udc *fotg210 = platform_get_drvdata(pdev);
+ int i;

usb_del_gadget_udc(&fotg210->gadget);
iounmap(fotg210->reg);
free_irq(platform_get_irq(pdev, 0), fotg210);

fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);
+ for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
+ kfree(fotg210->ep[i]);
kfree(fotg210);

return 0;
@@ -1102,7 +1105,7 @@ static int fotg210_udc_probe(struct plat
/* initialize udc */
fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL);
if (fotg210 == NULL)
- goto err_alloc;
+ goto err;

for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
_ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL);
@@ -1114,7 +1117,7 @@ static int fotg210_udc_probe(struct plat
fotg210->reg = ioremap(res->start, resource_size(res));
if (fotg210->reg == NULL) {
pr_err("ioremap error.\n");
- goto err_map;
+ goto err_alloc;
}

spin_lock_init(&fotg210->lock);
@@ -1162,7 +1165,7 @@ static int fotg210_udc_probe(struct plat
fotg210->ep0_req = fotg210_ep_alloc_request(&fotg210->ep[0]->ep,
GFP_KERNEL);
if (fotg210->ep0_req == NULL)
- goto err_req;
+ goto err_map;

fotg210_init(fotg210);

@@ -1190,12 +1193,14 @@ err_req:
fotg210_ep_free_request(&fotg210->ep[0]->ep, fotg210->ep0_req);

err_map:
- if (fotg210->reg)
- iounmap(fotg210->reg);
+ iounmap(fotg210->reg);

err_alloc:
+ for (i = 0; i < FOTG210_MAX_NUM_EP; i++)
+ kfree(fotg210->ep[i]);
kfree(fotg210);

+err:
return ret;
}