CVE-2024-26894

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