Messages in this thread | | | From | Andreas Schwab <> | Subject | Re: [PATCH v12 01/12] lib: introduce copy_struct_{to,from}_user helpers | Date | Thu, 05 Sep 2019 11:09:35 +0200 |
| |
On Sep 05 2019, Aleksa Sarai <cyphar@cyphar.com> wrote:
> diff --git a/lib/struct_user.c b/lib/struct_user.c > new file mode 100644 > index 000000000000..7301ab1bbe98 > --- /dev/null > +++ b/lib/struct_user.c > @@ -0,0 +1,182 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) 2019 SUSE LLC > + * Copyright (C) 2019 Aleksa Sarai <cyphar@cyphar.com> > + */ > + > +#include <linux/types.h> > +#include <linux/export.h> > +#include <linux/uaccess.h> > +#include <linux/kernel.h> > +#include <linux/string.h> > + > +#define BUFFER_SIZE 64 > + > +/* > + * "memset(p, 0, size)" but for user space buffers. Caller must have already > + * checked access_ok(p, size). > + */ > +static int __memzero_user(void __user *p, size_t s) > +{ > + const char zeros[BUFFER_SIZE] = {};
Perhaps make that static?
Andreas.
-- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."
| |