From 106133dacc001e4e3a7ebcdb96368f523bf44a89 Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Thu, 13 May 2021 14:33:53 -0500 Subject: [PATCH] usb: gadget: s3c-hsudc: Use struct_size() in devm_kzalloc() Make use of the struct_size() helper instead of an open-coded version, in order to avoid any potential type mistakes or integer overflows that, in the worse scenario, could lead to heap overflows. This code was detected with the help of Coccinelle and, audited and fixed manually. Acked-by: Felipe Balbi Signed-off-by: Gustavo A. R. Silva Link: https://lore.kernel.org/r/20210513193353.GA196565@embeddedor Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/udc/s3c-hsudc.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/usb/gadget/udc/s3c-hsudc.c b/drivers/usb/gadget/udc/s3c-hsudc.c index 7bd5182ce3ef0..89f1f8c9f02eb 100644 --- a/drivers/usb/gadget/udc/s3c-hsudc.c +++ b/drivers/usb/gadget/udc/s3c-hsudc.c @@ -1220,9 +1220,8 @@ static int s3c_hsudc_probe(struct platform_device *pdev) struct s3c24xx_hsudc_platdata *pd = dev_get_platdata(&pdev->dev); int ret, i; - hsudc = devm_kzalloc(&pdev->dev, sizeof(struct s3c_hsudc) + - sizeof(struct s3c_hsudc_ep) * pd->epnum, - GFP_KERNEL); + hsudc = devm_kzalloc(&pdev->dev, struct_size(hsudc, ep, pd->epnum), + GFP_KERNEL); if (!hsudc) return -ENOMEM; -- 2.30.2