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Helge Deller 32832a407a io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area() 
The io_uring testcase is broken on IA-64 since commit d808459b2e
("io_uring: Adjust mapping wrt architecture aliasing requirements").

The reason is, that this commit introduced an own architecture
independend get_unmapped_area() search algorithm which finds on IA-64 a
memory region which is outside of the regular memory region used for
shared userspace mappings and which can't be used on that platform
due to aliasing.

To avoid similar problems on IA-64 and other platforms in the future,
it's better to switch back to the architecture-provided
get_unmapped_area() function and adjust the needed input parameters
before the call. Beside fixing the issue, the function now becomes
easier to understand and maintain.

This patch has been successfully tested with the io_uring testcase on
physical x86-64, ppc64le, IA-64 and PA-RISC machines. On PA-RISC the LTP
mmmap testcases did not report any regressions.

Cc: stable@vger.kernel.org # 6.4
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Fixes: d808459b2e ("io_uring: Adjust mapping wrt architecture aliasing requirements")
Link: https://lore.kernel.org/r/20230721152432.196382-2-deller@gmx.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-07-21 09:41:29 -06:00
arch io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area() 2023-07-21 09:41:29 -06:00
block for-6.5/block-2023-06-23 2023-06-26 12:47:20 -07:00
certs KEYS: Add missing function documentation 2023-04-24 16:15:52 +03:00
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-06-02 15:36:23 +02:00
Documentation Thermal control updates for 6.5-rc1 2023-06-26 19:41:26 -07:00
drivers chrome platform changes for 6.5 2023-06-26 20:12:07 -07:00
fs - Add support for unaccepted memory as specified in the UEFI spec v2.9. 2023-06-26 15:32:39 -07:00
include Power management updates for 6.5-rc1 2023-06-26 19:36:30 -07:00
init Updates for the x86 boot process: 2023-06-26 13:39:10 -07:00
io_uring io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area() 2023-07-21 09:41:29 -06:00
ipc Merge branch 'work.namespace' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2023-02-24 19:20:07 -08:00
kernel Power management updates for 6.5-rc1 2023-06-26 19:36:30 -07:00
lib A single update for debug objects: 2023-06-26 13:33:00 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -07:00
net for-6.5/io_uring-2023-06-23 2023-06-26 12:30:26 -07:00
rust rust: error: impl Debug for Error with errname() integration 2023-06-13 01:24:42 +02:00
samples samples/bpf: Drop unnecessary fallthrough 2023-05-16 19:44:05 +02:00
scripts Rust changes for v6.5 2023-06-26 09:35:50 -07:00
security fsverity updates for 6.5 2023-06-26 10:56:13 -07:00
sound ASoC: Fix for v6.4 2023-06-21 15:23:23 +02:00
tools arm64 updates for 6.5: 2023-06-26 17:11:53 -07:00
usr initramfs: Check negative timestamp to prevent broken cpio archive 2023-04-16 17:37:01 +09:00
virt KVM: Avoid illegal stage2 mapping on invalid memory slot 2023-06-22 15:14:57 -04:00
.clang-format cxl for v6.4 2023-04-30 11:51:51 -07:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore linux-kselftest-kunit-6.4-rc1 2023-04-24 12:31:32 -07:00
.mailmap NFSD 6.5 Release Notes 2023-06-26 10:48:57 -07:00
.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 - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -07:00
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 - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -07:00
Makefile Linux 6.4 2023-06-25 16:29:58 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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 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.