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Stefano Stabellini 7f9bbc1140 xen/arm: call uaccess_ttbr0_enable for dm_op hypercall
dm_op hypercalls might come from userspace and pass memory addresses as
parameters. The memory addresses typically correspond to buffers
allocated in userspace to hold extra hypercall parameters.

On ARM, when CONFIG_ARM64_SW_TTBR0_PAN is enabled, they might not be
accessible by Xen, as a result ioreq hypercalls might fail. See the
existing comment in arch/arm64/xen/hypercall.S regarding privcmd_call
for reference.

For privcmd_call, Linux calls uaccess_ttbr0_enable before issuing the
hypercall thanks to commit 9cf09d68b8. We need to do the same for
dm_op. This resolves the problem.

Cc: stable@kernel.org
Fixes: 9cf09d68b8 ("arm64: xen: Enable user access before a privcmd hvc call")
Signed-off-by: Stefano Stabellini <stefano.stabellini@amd.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Message-ID: <alpine.DEB.2.22.394.2505121446370.8380@ubuntu-linux-20-04-desktop>
Signed-off-by: Juergen Gross <jgross@suse.com>
2025-05-23 07:10:02 +02:00
arch xen/arm: call uaccess_ttbr0_enable for dm_op hypercall 2025-05-23 07:10:02 +02:00
block SCSI fixes on 20250516 2025-05-16 10:28:22 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: scompress - increment scomp_scratch_users when already allocated 2025-04-25 10:33:30 +08:00
Documentation hid-for-linus-2025051501 2025-05-15 10:57:24 -07:00
drivers xen/x86: fix initial memory balloon target 2025-05-23 07:09:00 +02:00
fs two smb3 client fixes 2025-05-16 18:02:41 -07:00
include Nine singleton hotfixes, all MM. Four are cc:stable. 2025-05-17 10:56:52 -07:00
init init: remove unused CONFIG_CC_CAN_LINK_STATIC 2025-05-12 15:03:46 +09:00
io_uring io_uring/fdinfo: grab ctx->uring_lock around io_uring_show_fdinfo() 2025-05-14 07:15:28 -06:00
ipc treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
kernel xen: enable XEN_UNPOPULATED_ALLOC as part of xen.config 2025-05-23 07:07:09 +02:00
lib hardening fixes for v6.15-rc3 2025-04-18 13:20:20 -07:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm Nine singleton hotfixes, all MM. Four are cc:stable. 2025-05-17 10:56:52 -07:00
net net: devmem: fix kernel panic when netlink socket close after module unload 2025-05-15 08:05:32 -07:00
rust rust: clean Rust 1.88.0's clippy::uninlined_format_args lint 2025-05-07 00:11:47 +02:00
samples tracing: samples: Initialize trace_array_printk() with the correct function 2025-05-12 13:07:22 -04:00
scripts kbuild: fix typos "module.builtin" to "modules.builtin" 2025-05-12 15:04:52 +09:00
security landlock: Improve bit operations in audit code 2025-05-12 11:38:53 +02:00
sound ALSA: usb-audio: Add sample rate quirk for Microdia JP001 USB Camera 2025-05-15 12:45:48 +02:00
tools Including fixes from Bluetooth and wireless. 2025-05-15 10:40:49 -07:00
usr usr/include: openrisc: don't HDRTEST bpf_perf_event.h 2025-05-12 15:03:17 +09:00
virt ARM: 2025-04-08 13:47:55 -07:00
.clang-format clang-format: Update the ForEachMacros list for v6.15-rc1 2025-04-13 11:03:59 +02:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +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: Create intermediate vmlinux build with relocations preserved 2025-03-17 00:29:50 +09:00
.mailmap soc: fixes for 6.15, part 2 2025-05-14 09:11:05 -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 MAINTAINERS: update SLAB ALLOCATOR maintainers 2025-04-17 20:10:06 -07:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS Nine singleton hotfixes, all MM. Four are cc:stable. 2025-05-17 10:56:52 -07:00
Makefile Linux 6.15-rc7 2025-05-18 13:57:29 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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.