CVE-2024-26894

In the Linux kernel, the following vulnerability has been resolved: ACPI:
processor_idle: Fix memory leak in acpi_processor_power_exit() After
unregistering the CPU idle device, the memory associated with it is not
freed, leading to a memory leak: unreferenced object 0xffff896282f6c000
(size 1024): comm “swapper/0”, pid 1, jiffies 4294893170 hex dump (first 32
bytes): 00 00 00 00 0b 00 00 00 00 00 00 00 00 00 00 00 … 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 … backtrace
(crc 8836a742): [<ffffffff993495ed>] kmalloc_trace+0x29d/0x340
[<ffffffff9972f3b3>] acpi_processor_power_init+0xf3/0x1c0
[<ffffffff9972d263>] __acpi_processor_start+0xd3/0xf0 [<ffffffff9972d2bc>]
acpi_processor_start+0x2c/0x50 [<ffffffff99805872>] really_probe+0xe2/0x480
[<ffffffff99805c98>] __driver_probe_device+0x78/0x160 [<ffffffff99805daf>]
driver_probe_device+0x1f/0x90 [<ffffffff9980601e>]
__driver_attach+0xce/0x1c0 [<ffffffff99803170>] bus_for_each_dev+0x70/0xc0
[<ffffffff99804822>] bus_add_driver+0x112/0x210 [<ffffffff99807245>]
driver_register+0x55/0x100 [<ffffffff9aee4acb>]
acpi_processor_driver_init+0x3b/0xc0 [<ffffffff990012d1>]
do_one_initcall+0x41/0x300 [<ffffffff9ae7c4b0>]
kernel_init_freeable+0x320/0x470 [<ffffffff99b231f6>]
kernel_init+0x16/0x1b0 [<ffffffff99042e6d>] ret_from_fork+0x2d/0x50 Fix
this by freeing the CPU idle device after unregistering it.