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[ Upstream commit9dc6488e84] If offset is not zero and length is bigger than PAGE_SIZE, this will cause to out of boundary access to a page memory Fixes:98cc093cba("block, THP: make block_device_operations.rw_page support THP") Co-developed-by: Liang ZhiCheng <liangzhicheng@baidu.com> Signed-off-by: Liang ZhiCheng <liangzhicheng@baidu.com> Signed-off-by: Li RongQing <lirongqing@baidu.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Sasha Levin <sashal@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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.