Thomas Weißschuh 5e720f8c8c cpufreq: amd-pstate: fix global sysfs attribute type
In commit 3666062b87ec ("cpufreq: amd-pstate: move to use bus_get_dev_root()")
the "amd_pstate" attributes where moved from a dedicated kobject to the
cpu root kobject.

While the dedicated kobject expects to contain kobj_attributes the root
kobject needs device_attributes.

As the changed arguments are not used by the callbacks it works most of
the time.
However CFI will detect this issue:

[ 4947.849350] CFI failure at dev_attr_show+0x24/0x60 (target: show_status+0x0/0x70; expected type: 0x8651b1de)
...
[ 4947.849409] Call Trace:
[ 4947.849410]  <TASK>
[ 4947.849411]  ? __warn+0xcf/0x1c0
[ 4947.849414]  ? dev_attr_show+0x24/0x60
[ 4947.849415]  ? report_cfi_failure+0x4e/0x60
[ 4947.849417]  ? handle_cfi_failure+0x14c/0x1d0
[ 4947.849419]  ? __cfi_show_status+0x10/0x10
[ 4947.849420]  ? handle_bug+0x4f/0x90
[ 4947.849421]  ? exc_invalid_op+0x1a/0x60
[ 4947.849422]  ? asm_exc_invalid_op+0x1a/0x20
[ 4947.849424]  ? __cfi_show_status+0x10/0x10
[ 4947.849425]  ? dev_attr_show+0x24/0x60
[ 4947.849426]  sysfs_kf_seq_show+0xa6/0x110
[ 4947.849433]  seq_read_iter+0x16c/0x4b0
[ 4947.849436]  vfs_read+0x272/0x2d0
[ 4947.849438]  ksys_read+0x72/0xe0
[ 4947.849439]  do_syscall_64+0x76/0xb0
[ 4947.849440]  ? do_user_addr_fault+0x252/0x650
[ 4947.849442]  ? exc_page_fault+0x7a/0x1b0
[ 4947.849443]  entry_SYSCALL_64_after_hwframe+0x72/0xdc

Fixes: 3666062b87ec ("cpufreq: amd-pstate: move to use bus_get_dev_root()")
Reported-by: Jannik Glückert <jannik.glueckert@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=217765
Link: https://lore.kernel.org/lkml/c7f1bf9b-b183-bf6e-1cbb-d43f72494083@gmail.com/
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2023-08-07 19:41:48 +02:00
2023-08-05 13:16:17 -07:00
2023-07-22 11:05:15 -07:00
2023-08-06 10:43:52 -07:00
2023-08-06 10:43:52 -07:00
2023-07-01 09:24:31 -07:00
2023-07-28 10:19:44 -07:00
2023-08-02 18:10:26 -07:00
2023-07-30 11:19:08 -07:00
2023-07-27 14:54:23 +02:00
2023-08-04 17:16:14 -07:00
2022-09-28 09:02:20 +02:00
2023-06-26 16:43:54 -07:00
2022-10-10 12:00:45 -07:00
2023-08-04 12:01:26 -07:00
2023-08-06 15:07:51 -07:00

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 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.
Description
No description provided
Readme 5.7 GiB
Languages
C 97.6%
Assembly 1%
Shell 0.5%
Python 0.3%
Makefile 0.3%