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Vasily Gorbik cc00550b2a Revert "s390/mm: Allow large pages for KASAN shadow mapping" 
This reverts commit ff123eb774.

Allowing large pages for KASAN shadow mappings isn't inherently wrong,
but adding POPULATE_KASAN_MAP_SHADOW to large_allowed() exposes an issue
in can_large_pud() and can_large_pmd().

Since commit d8073dc6bc ("s390/mm: Allow large pages only for aligned
physical addresses"), both can_large_pud() and can_large_pmd() call _pa()
to check if large page physical addresses are aligned. However, _pa()
has a side effect: it allocates memory in POPULATE_KASAN_MAP_SHADOW
mode. This results in massive memory leaks.

The proper fix would be to address both large_allowed() and _pa()'s side
effects, but for now, revert this change to avoid the leaks.

Fixes: ff123eb774 ("s390/mm: Allow large pages for KASAN shadow mapping")
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2024-11-29 13:41:11 +01:00
arch Revert "s390/mm: Allow large pages for KASAN shadow mapping" 2024-11-29 13:41:11 +01:00
block for-6.13/block-20241118 2024-11-18 16:50:08 -08:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto Random number generator updates for Linux 6.13-rc1. 2024-11-19 10:43:44 -08:00
Documentation Locking changes for v6.13 are: 2024-11-19 12:43:11 -08:00
drivers s390/ap: Replace xchg() with WRITE_ONCE() 2024-11-27 12:55:15 +01:00
fs Scheduler changes for v6.13: 2024-11-19 14:16:06 -08:00
include Scheduler changes for v6.13: 2024-11-19 14:16:06 -08:00
init vfs-6.13.misc 2024-11-18 09:35:30 -08:00
io_uring for-6.13/io_uring-20241118 2024-11-18 17:02:57 -08:00
ipc fdget(), more trivial conversions 2024-11-03 01:28:06 -05:00
kernel Scheduler changes for v6.13: 2024-11-19 14:16:06 -08:00
lib Locking changes for v6.13 are: 2024-11-19 12:43:11 -08:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm arm64 updates for 6.13: 2024-11-18 18:10:37 -08:00
net Random number generator updates for Linux 6.13-rc1. 2024-11-19 10:43:44 -08:00
rust Locking changes for v6.13 are: 2024-11-19 12:43:11 -08:00
samples - Log and handle twp new AMD-specific MCA registers: SYND1 and SYND2 and 2024-11-19 12:04:51 -08:00
scripts Objtool changes for v6.13: 2024-11-19 13:27:52 -08:00
security This update includes the following changes: 2024-11-19 10:28:41 -08:00
sound the bulk of struct fd memory safety stuff 2024-11-18 12:24:06 -08:00
tools Performance events changes for v6.13: 2024-11-19 13:34:06 -08:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt the bulk of struct fd memory safety stuff 2024-11-18 12:24:06 -08:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Kbuild updates for v6.12 2024-09-24 13:02:06 -07:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS - Add support for Bluefield-2 SOCs to bluefield_edac 2024-11-19 12:00:10 -08:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS - Add support for Bluefield-2 SOCs to bluefield_edac 2024-11-19 12:00:10 -08:00
Makefile Linux 6.12 2024-11-17 14:15:08 -08:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

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 reStructuredText 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.