linux-kernel - Re: [PATCH v3 08/30] drivers: hv: dxgkrnl: Creation of dxgcontext objects

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220302125922.xigz7wg6w2y7rufp@liuwe-devbox-debian-v2>
Date:   Wed, 2 Mar 2022 12:59:22 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Iouri Tarassov <iourit@...ux.microsoft.com>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, linux-hyperv@...r.kernel.org,
        linux-kernel@...r.kernel.org, spronovo@...rosoft.com,
        spronovo@...ux.microsoft.com, gregkh@...uxfoundation.org
Subject: Re: [PATCH v3 08/30] drivers: hv: dxgkrnl: Creation of dxgcontext
 objects

On Tue, Mar 01, 2022 at 11:45:55AM -0800, Iouri Tarassov wrote:
[...]
> +static int
> +dxgk_create_context_virtual(struct dxgprocess *process, void *__user inargs)
> +{
> +	struct d3dkmt_createcontextvirtual args;
> +	int ret;
> +	struct dxgadapter *adapter = NULL;
> +	struct dxgdevice *device = NULL;
> +	struct dxgcontext *context = NULL;
> +	struct d3dkmthandle host_context_handle = {};
> +	bool device_lock_acquired = false;
> +
> +	pr_debug("ioctl: %s", __func__);
> +
> +	ret = copy_from_user(&args, inargs, sizeof(args));
> +	if (ret) {
> +		pr_err("%s failed to copy input args", __func__);
> +		ret = -EINVAL;

This should be -EFAULT. This goes for other copy_from_user calls too. You can also
drop the pr_err above.

Thanks,
Wei.