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Date: Sun, 31 May 2015 23:43:43 +0100 From: Colin King <colin.king@...onical.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Laurent Pinchart <laurent.pinchart@...asonboard.com>, Felipe Balbi <balbi@...com>, Sudeep Holla <sudeep.holla@....com>, linux-usb@...r.kernel.org Cc: linux-kernel@...r.kernel.org Subject: [PATCH][V2] usb: isp1760: fix null dereference if kzalloc returns null From: Colin Ian King <colin.king@...onical.com> If kzalloc returns null then isp1760_ep_alloc_request performs a null pointer dereference on req. Check for null to avoid this. Detected with smatch static analysis: drivers/usb/isp1760/isp1760-udc.c:816 isp1760_ep_alloc_request() error: potential null dereference 'req'. (kzalloc returns null) Signed-off-by: Colin Ian King <colin.king@...onical.com> --- drivers/usb/isp1760/isp1760-udc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c index 3fc4fe7..18ebf5b 100644 --- a/drivers/usb/isp1760/isp1760-udc.c +++ b/drivers/usb/isp1760/isp1760-udc.c @@ -812,6 +812,8 @@ static struct usb_request *isp1760_ep_alloc_request(struct usb_ep *ep, struct isp1760_request *req; req = kzalloc(sizeof(*req), gfp_flags); + if (!req) + return NULL; return &req->req; } -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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