From: Zhen Ni Date: Wed, 2 Mar 2022 03:37:16 +0000 (+0800) Subject: USB: host: isp116x: check return value after calling platform_get_resource() X-Git-Tag: v4.9.318~26 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=804de302ada3544699c5f48c5314b249af76faa3;p=thirdparty%2Fkernel%2Fstable.git USB: host: isp116x: check return value after calling platform_get_resource() [ Upstream commit 134a3408c2d3f7e23eb0e4556e0a2d9f36c2614e ] It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Zhen Ni Link: https://lore.kernel.org/r/20220302033716.31272-1-nizhen@uniontech.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c index d089b3fb7a13d..c32145e63aea6 100644 --- a/drivers/usb/host/isp116x-hcd.c +++ b/drivers/usb/host/isp116x-hcd.c @@ -1551,10 +1551,12 @@ static int isp116x_remove(struct platform_device *pdev) iounmap(isp116x->data_reg); res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - release_mem_region(res->start, 2); + if (res) + release_mem_region(res->start, 2); iounmap(isp116x->addr_reg); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(res->start, 2); + if (res) + release_mem_region(res->start, 2); usb_put_hcd(hcd); return 0;