Re: [PATCH v2 4/8] cxl/mem: Add basic IOCTL interface

[Al Viro]

On Sun, Feb 14, 2021 at 11:50:12PM +0000, Al Viro wrote:
>       check that len is reasonable
>       p = kmalloc(offsetof(struct foo, string[len]), GFP_KERNEL);
>       copy_from_user(p, user_object, len);
                        offsetof(struct foo, string[len]), that is
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