Hyesoo Yu 76f26535d1 mm: page_alloc: check the order of compound page even when the order is zero
For compound pages, the head sets the PG_head flag and the tail sets the
compound_head to indicate the head page.  If a user allocates a compound
page and frees it with a different order, the compound page information
will not be properly initialized.  To detect this problem,
compound_order(page) and the order argument are compared, but this is not
checked when the order argument is zero.  That error should be checked
regardless of the order.

Link: https://lkml.kernel.org/r/20231023083217.1866451-1-hyesoo.yu@samsung.com
Signed-off-by: Hyesoo Yu <hyesoo.yu@samsung.com>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-10-25 16:47:14 -07:00
…
…
2023-10-01 14:15:13 -07:00
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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.
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