571d1a7222
When HL_INFO_USER_MAPPINGS IOCTL is called, we copy_to_user from a dynamically allocated memory - 'user_mappings'. Since freeing/allocating it happens in runtime (upon a page fault), it not unlikely to access it even before being initially allocated (i.e., accessing a NULL pointer). The solution is to simply mark the spot when the err info has been collected, and that way to know whether err info (either page fault or RAZWI) is available to be read. Signed-off-by: Koby Elbaz <kelbaz@habana.ai> Reviewed-by: Oded Gabbay <ogabbay@kernel.org> Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
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.