Messages in this thread Patch in this message | | | From | Evgeny Novikov <> | Subject | [PATCH] usb: gadget: udc: gr_udc: fix memleak on error handling path in gr_ep_init() | Date | Fri, 26 Jun 2020 16:17:47 +0300 |
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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> --- drivers/usb/gadget/udc/gr_udc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/udc/gr_udc.c b/drivers/usb/gadget/udc/gr_udc.c index 7164ad9800f1..7419889ebe9a 100644 --- a/drivers/usb/gadget/udc/gr_udc.c +++ b/drivers/usb/gadget/udc/gr_udc.c @@ -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; } -- 2.16.4
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