CVE-2024-26890

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Bluetooth: btrtl: fix out of bounds memory access<br /> <br /> The problem is detected by KASAN.<br /> btrtl driver uses private hci data to store &amp;#39;struct btrealtek_data&amp;#39;.<br /> If btrtl driver is used with btusb, then memory for private hci data<br /> is allocated in btusb. But no private data is allocated after hci_dev,<br /> when btrtl is used with hci_h5.<br /> <br /> This commit adds memory allocation for hci_h5 case.<br /> <br /> ==================================================================<br /> BUG: KASAN: slab-out-of-bounds in btrtl_initialize+0x6cc/0x958 [btrtl]<br /> Write of size 8 at addr ffff00000f5a5748 by task kworker/u9:0/76<br /> <br /> Hardware name: Pine64 PinePhone (1.2) (DT)<br /> Workqueue: hci0 hci_power_on [bluetooth]<br /> Call trace:<br /> dump_backtrace+0x9c/0x128<br /> show_stack+0x20/0x38<br /> dump_stack_lvl+0x48/0x60<br /> print_report+0xf8/0x5d8<br /> kasan_report+0x90/0xd0<br /> __asan_store8+0x9c/0xc0<br /> [btrtl]<br /> h5_btrtl_setup+0xd0/0x2f8 [hci_uart]<br /> h5_setup+0x50/0x80 [hci_uart]<br /> hci_uart_setup+0xd4/0x260 [hci_uart]<br /> hci_dev_open_sync+0x1cc/0xf68 [bluetooth]<br /> hci_dev_do_open+0x34/0x90 [bluetooth]<br /> hci_power_on+0xc4/0x3c8 [bluetooth]<br /> process_one_work+0x328/0x6f0<br /> worker_thread+0x410/0x778<br /> kthread+0x168/0x178<br /> ret_from_fork+0x10/0x20<br /> <br /> Allocated by task 53:<br /> kasan_save_stack+0x3c/0x68<br /> kasan_save_track+0x20/0x40<br /> kasan_save_alloc_info+0x68/0x78<br /> __kasan_kmalloc+0xd4/0xd8<br /> __kmalloc+0x1b4/0x3b0<br /> hci_alloc_dev_priv+0x28/0xa58 [bluetooth]<br /> hci_uart_register_device+0x118/0x4f8 [hci_uart]<br /> h5_serdev_probe+0xf4/0x178 [hci_uart]<br /> serdev_drv_probe+0x54/0xa0<br /> really_probe+0x254/0x588<br /> __driver_probe_device+0xc4/0x210<br /> driver_probe_device+0x64/0x160<br /> __driver_attach_async_helper+0x88/0x158<br /> async_run_entry_fn+0xd0/0x388<br /> process_one_work+0x328/0x6f0<br /> worker_thread+0x410/0x778<br /> kthread+0x168/0x178<br /> ret_from_fork+0x10/0x20<br /> <br /> Last potentially related work creation:<br /> kasan_save_stack+0x3c/0x68<br /> __kasan_record_aux_stack+0xb0/0x150<br /> kasan_record_aux_stack_noalloc+0x14/0x20<br /> __queue_work+0x33c/0x960<br /> queue_work_on+0x98/0xc0<br /> hci_recv_frame+0xc8/0x1e8 [bluetooth]<br /> h5_complete_rx_pkt+0x2c8/0x800 [hci_uart]<br /> h5_rx_payload+0x98/0xb8 [hci_uart]<br /> h5_recv+0x158/0x3d8 [hci_uart]<br /> hci_uart_receive_buf+0xa0/0xe8 [hci_uart]<br /> ttyport_receive_buf+0xac/0x178<br /> flush_to_ldisc+0x130/0x2c8<br /> process_one_work+0x328/0x6f0<br /> worker_thread+0x410/0x778<br /> kthread+0x168/0x178<br /> ret_from_fork+0x10/0x20<br /> <br /> Second to last potentially related work creation:<br /> kasan_save_stack+0x3c/0x68<br /> __kasan_record_aux_stack+0xb0/0x150<br /> kasan_record_aux_stack_noalloc+0x14/0x20<br /> __queue_work+0x788/0x960<br /> queue_work_on+0x98/0xc0<br /> __hci_cmd_sync_sk+0x23c/0x7a0 [bluetooth]<br /> __hci_cmd_sync+0x24/0x38 [bluetooth]<br /> btrtl_initialize+0x760/0x958 [btrtl]<br /> h5_btrtl_setup+0xd0/0x2f8 [hci_uart]<br /> h5_setup+0x50/0x80 [hci_uart]<br /> hci_uart_setup+0xd4/0x260 [hci_uart]<br /> hci_dev_open_sync+0x1cc/0xf68 [bluetooth]<br /> hci_dev_do_open+0x34/0x90 [bluetooth]<br /> hci_power_on+0xc4/0x3c8 [bluetooth]<br /> process_one_work+0x328/0x6f0<br /> worker_thread+0x410/0x778<br /> kthread+0x168/0x178<br /> ret_from_fork+0x10/0x20<br /> ==================================================================