Vulnerabilidad en kernel de Linux (CVE-2024-49886)

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: plataforma/x86: ISST: Se corrige el error de informe KASAN slab-out-of-bounds. Conectar un dispositivo PCI SST a una máquina virtual provoca "BUG: KASAN: slab-out-of-bounds". informe de kasan: [ 19.411889] ======================================================================= [ 19.413702] ERROR: KASAN: slab fuera de los límites en _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common] [ 19.415634] Lectura de tamaño 8 en la dirección ffff888829e65200 por la tarea cpuhp/16/113 [ 19.417368] [ 19.418627] CPU: 16 PID: 113 Comm: cpuhp/16 Contaminado: GE 6.9.0 #10 [ 19.420435] Nombre del hardware: VMware, Inc. VMware20,1/440BX Desktop Reference Platform, BIOS VMW201.00V.20192059.B64.2207280713 28/07/2022 [ 19.422687] Seguimiento de llamadas: [ 19.424091] [ 19.425448] dump_stack_lvl+0x5d/0x80 [ 19.426963] ? _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common] [ 19.428694] print_report+0x19d/0x52e [ 19.430206] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 19.431837] ? _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common] [ 19.433539] kasan_report+0xf0/0x170 [ 19.435019] ? _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common] [ 19.436709] _isst_if_get_pci_dev+0x3d5/0x400 [isst_if_common] [ 19.438379] ? __pfx_sched_clock_cpu+0x10/0x10 [ 19.439910] isst_if_cpu_online+0x406/0x58f [isst_if_common] [ 19.441573] ? __pfx_isst_if_cpu_online+0x10/0x10 [isst_if_common] [ 19.443263] ? ttwu_queue_wakelist+0x2c1/0x360 [ 19.444797] cpuhp_invoke_callback+0x221/0xec0 [ 19.446337] cpuhp_thread_fun+0x21b/0x610 [ 19.447814] ? __pfx_cpuhp_thread_fun+0x10/0x10 [ 19.449354] smpboot_thread_fn+0x2e7/0x6e0 [ 19.450859] ? __pfx_smpboot_thread_fn+0x10/0x10 [ 19.452405] kthread+0x29c/0x350 [ 19.453817] ? __pfx_kthread+0x10/0x10 [ 19.455253] ret_from_fork+0x31/0x70 [ 19.456685] ? __pfx_kthread+0x10/0x10 [ 19.458114] ret_from_fork_asm+0x1a/0x30 [ 19.459573] [ 19.460853] [ 19.462055] Asignado por la tarea 1198: [ 19.463410] kasan_save_stack+0x30/0x50 [ 19.464788] kasan_save_track+0x14/0x30 [ 19.466139] __kasan_kmalloc+0xaa/0xb0 [ 19.467465] __kmalloc+0x1cd/0x470 [ 19.468748] isst_if_cdev_register+0x1da/0x350 [isst_if_common] [ 19.470233] isst_if_mbox_init+0x108/0xff0 [isst_if_mbox_msr] [ 19.471670] do_one_initcall+0xa4/0x380 [ 19.472903] do_init_module+0x238/0x760 [ 19.474105] load_module+0x5239/0x6f00 [ 19.475285] init_module_from_file+0xd1/0x130 [ 19.476506] idempotent_init_module+0x23b/0x650 [ 19.477725] __x64_sys_finit_module+0xbe/0x130 [ 19.476506] idempotent_init_module+0x23b/0x650 [ 19.477725] __x64_sys_finit_module+0xbe/0x130 [ 19.478920] do_syscall_64+0x82/0x160 [ 19.480036] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 19.481292] [ 19.482205] La dirección con errores pertenece al objeto en ffff888829e65000 que pertenece a la caché kmalloc-512 de tamaño 512 [ 19.484818] La dirección con errores se encuentra 0 bytes a la derecha de la región asignada de 512 bytes [ffff888829e65000, ffff888829e65200) [ 19.487447] [ 19.488328] La dirección con errores pertenece a la página física: [ 19.489569] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888829e60c00 pfn:0x829e60 [ 19.491140] head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 19.492466] anon flags: 0x57ffffc0000840(losa|cabeza|nodo=1|zona=2|lastcpupid=0x1fffff) [ 19.493914] tipo_de_página: 0xffffffff() [ 19.494988] sin procesar: 0057ffffc0000840 ffff88810004cc80 0000000000000000 0000000000000001 [ 19.496451] sin procesar: ffff888829e60c00 0000000080200018 00000001ffffffff 0000000000000000 [ 19.497906] cabeza: 0057ffffc0000840 ffff88810004cc80 0000000000000000 000000000000001 [ 19.499379] cabeza: ffff888829e60c00 0000000080200018 00000001ffffffff 0000000000000000 [ 19.500844] cabeza: 0057ffffc0000003 ffffea0020a79801 ffffea0020a79848 00000000ffffffff [ 19.502316] cabeza: 0000000800000000 0000000000000000 00000000ffffffff 000000000000000 [ 19.503784] página volcada porque: k ---truncada---