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When the loop over the VMA is terminated early due to an error, the return
code could be overwritten with ENOMEM. Fix the return code by only
setting the error on early loop termination when the error is not set.
User-visible effects include: attempts to run mprotect() against a
special mapping or with a poorly-aligned hugetlb address should return
-EINVAL, but they presently return -ENOMEM. In other cases an -EACCESS
should be returned.
Link: https://lkml.kernel.org/r/20230406193050.1363476-1-Liam.Howlett@oracle.com
Fixes: 2286a6914c ("mm: change mprotect_fixup to vma iterator")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.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.