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ceac10c83b
__copy_to_user_memcpy() and __clear_user_memset() had been calling
memcpy() and memset() respectively, leading to false-positive KASAN
reports when starting userspace:
[ 10.707901] Run /init as init process
[ 10.731892] process '/bin/busybox' started with executable stack
[ 10.745234] ==================================================================
[ 10.745796] BUG: KASAN: user-memory-access in __clear_user_memset+0x258/0x3ac
[ 10.747260] Write of size 2687 at addr 000de581 by task init/1
Use __memcpy() and __memset() instead to allow userspace access, which
is of course the intent of these functions.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.