CVE-2022-50419

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times<br /> <br /> device_add shall not be called multiple times as stated in its<br /> documentation:<br /> <br /> &amp;#39;Do not call this routine or device_register() more than once for<br /> any device structure&amp;#39;<br /> <br /> Syzkaller reports a bug as follows [1]:<br /> ------------[ cut here ]------------<br /> kernel BUG at lib/list_debug.c:33!<br /> invalid opcode: 0000 [#1] PREEMPT SMP KASAN<br /> [...]<br /> Call Trace:<br /> <br /> __list_add include/linux/list.h:69 [inline]<br /> list_add_tail include/linux/list.h:102 [inline]<br /> kobj_kset_join lib/kobject.c:164 [inline]<br /> kobject_add_internal+0x18f/0x8f0 lib/kobject.c:214<br /> kobject_add_varg lib/kobject.c:358 [inline]<br /> kobject_add+0x150/0x1c0 lib/kobject.c:410<br /> device_add+0x368/0x1e90 drivers/base/core.c:3452<br /> hci_conn_add_sysfs+0x9b/0x1b0 net/bluetooth/hci_sysfs.c:53<br /> hci_le_cis_estabilished_evt+0x57c/0xae0 net/bluetooth/hci_event.c:6799<br /> hci_le_meta_evt+0x2b8/0x510 net/bluetooth/hci_event.c:7110<br /> hci_event_func net/bluetooth/hci_event.c:7440 [inline]<br /> hci_event_packet+0x63d/0xfd0 net/bluetooth/hci_event.c:7495<br /> hci_rx_work+0xae7/0x1230 net/bluetooth/hci_core.c:4007<br /> process_one_work+0x991/0x1610 kernel/workqueue.c:2289<br /> worker_thread+0x665/0x1080 kernel/workqueue.c:2436<br /> kthread+0x2e4/0x3a0 kernel/kthread.c:376<br /> ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306<br />