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

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[ 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>
This commit is contained in:
Evgeny Novikov 2020-06-26 16:17:47 +03:00 • committed by Greg Kroah-Hartman
commit 89fe6eba17
1 changed files with 5 additions and 2 deletions
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7
drivers/usb/gadget/udc/gr_udc.c
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@ -1980,9 +1980,12 @@ 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;
}