published July 10, 2025
In the Linux kernel, the following vulnerability has been resolved:
ACPI: platform_profile: Avoid initializing on non-ACPI platforms
The platform profile driver is loaded even on platforms that do not have
ACPI enabled. The initialization of the sysfs entries was recently moved
from platform_profile_register() to the module init call, and those
entries need acpi_kobj to be initialized which is not the case when ACPI
is disabled.
This results in the following warning:
WARNING: CPU: 5 PID: 1 at fs/sysfs/group.c:131 internal_create_group+0xa22/0xdd8
Modules linked in:
CPU: 5 UID: 0 PID: 1 Comm: swapper/0 Tainted: G W 6.15.0-rc7-dirty #6 PREEMPT
Tainted: [W]=WARN
Hardware name: riscv-virtio,qemu (DT)
epc : internal_create_group+0xa22/0xdd8
ra : internal_create_group+0xa22/0xdd8
Call Trace:
internal_create_group+0xa22/0xdd8
sysfs_create_group+0x22/0x2e
platform_profile_init+0x74/0xb2
do_one_initcall+0x198/0xa9e
kernel_init_freeable+0x6d8/0x780
kernel_init+0x28/0x24c
ret_from_fork+0xe/0x18
Fix this by checking if ACPI is enabled before trying to create sysfs
entries.
[ rjw: Subject and changelog edits ]