CVE-2025-38296

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 platformprofileregister() 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 internalcreategroup+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 : internalcreategroup+0xa22/0xdd8 ra : internalcreategroup+0xa22/0xdd8

Call Trace:

internalcreategroup+0xa22/0xdd8 sysfscreategroup+0x22/0x2e platformprofileinit+0x74/0xb2 dooneinitcall+0x198/0xa9e kernelinitfreeable+0x6d8/0x780 kernelinit+0x28/0x24c retfrom_fork+0xe/0x18

Fix this by checking if ACPI is enabled before trying to create sysfs entries.

[ rjw: Subject and changelog edits ]