Commit f038d105 authored Jun 26, 2020 by Evgeny Novikov Committed by Greg Kroah-Hartman Jul 31, 2020

usb: gadget: udc: gr_udc: fix memleak on error handling path in gr_ep_init()



[ Upstream commit c8f8529e2c4141afa2ebb487ad48e8a6ec3e8c99 ]

gr_ep_init() does not assign the allocated request anywhere if allocation
of memory for the buffer fails. This is a memory leak fixed by the given
patch.

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

Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 9ef02621

drivers/usb/gadget/udc/gr_udc.c

+5 −2

Original line number	Diff line number	Diff line
		@@ -2000,9 +2000,12 @@ static int gr_ep_init(struct gr_udc *dev, int num, int is_in, u32 maxplimit)

		if (num == 0) {
		_req = gr_alloc_request(&ep->ep, GFP_ATOMIC);
		if (!_req)
		return -ENOMEM;

		buf = devm_kzalloc(dev->dev, PAGE_SIZE, GFP_DMA \| GFP_ATOMIC);
		if (!_req \|\| !buf) {
		/* possible _req freed by gr_probe via gr_remove */
		if (!buf) {
		gr_free_request(&ep->ep, _req);
		return -ENOMEM;
		}