CVE-2024-46743

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> of/irq: Prevent device address out-of-bounds read in interrupt map walk<br /> <br /> When of_irq_parse_raw() is invoked with a device address smaller than<br /> the interrupt parent node (from #address-cells property), KASAN detects<br /> the following out-of-bounds read when populating the initial match table<br /> (dyndbg="func of_irq_parse_* +p"):<br /> <br /> OF: of_irq_parse_one: dev=/soc@0/picasso/watchdog, index=0<br /> OF: parent=/soc@0/pci@878000000000/gpio0@17,0, intsize=2<br /> OF: intspec=4<br /> OF: of_irq_parse_raw: ipar=/soc@0/pci@878000000000/gpio0@17,0, size=2<br /> OF: -&gt; addrsize=3<br /> ==================================================================<br /> BUG: KASAN: slab-out-of-bounds in of_irq_parse_raw+0x2b8/0x8d0<br /> Read of size 4 at addr ffffff81beca5608 by task bash/764<br /> <br /> CPU: 1 PID: 764 Comm: bash Tainted: G O 6.1.67-484c613561-nokia_sm_arm64 #1<br /> Hardware name: Unknown Unknown Product/Unknown Product, BIOS 2023.01-12.24.03-dirty 01/01/2023<br /> Call trace:<br /> dump_backtrace+0xdc/0x130<br /> show_stack+0x1c/0x30<br /> dump_stack_lvl+0x6c/0x84<br /> print_report+0x150/0x448<br /> kasan_report+0x98/0x140<br /> __asan_load4+0x78/0xa0<br /> of_irq_parse_raw+0x2b8/0x8d0<br /> of_irq_parse_one+0x24c/0x270<br /> parse_interrupts+0xc0/0x120<br /> of_fwnode_add_links+0x100/0x2d0<br /> fw_devlink_parse_fwtree+0x64/0xc0<br /> device_add+0xb38/0xc30<br /> of_device_add+0x64/0x90<br /> of_platform_device_create_pdata+0xd0/0x170<br /> of_platform_bus_create+0x244/0x600<br /> of_platform_notify+0x1b0/0x254<br /> blocking_notifier_call_chain+0x9c/0xd0<br /> __of_changeset_entry_notify+0x1b8/0x230<br /> __of_changeset_apply_notify+0x54/0xe4<br /> of_overlay_fdt_apply+0xc04/0xd94<br /> ...<br /> <br /> The buggy address belongs to the object at ffffff81beca5600<br /> which belongs to the cache kmalloc-128 of size 128<br /> The buggy address is located 8 bytes inside of<br /> 128-byte region [ffffff81beca5600, ffffff81beca5680)<br /> <br /> The buggy address belongs to the physical page:<br /> page:00000000230d3d03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1beca4<br /> head:00000000230d3d03 order:1 compound_mapcount:0 compound_pincount:0<br /> flags: 0x8000000000010200(slab|head|zone=2)<br /> raw: 8000000000010200 0000000000000000 dead000000000122 ffffff810000c300<br /> raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000<br /> page dumped because: kasan: bad access detected<br /> <br /> Memory state around the buggy address:<br /> ffffff81beca5500: 04 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc<br /> ffffff81beca5580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc<br /> &gt;ffffff81beca5600: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc<br /> ^<br /> ffffff81beca5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc<br /> ffffff81beca5700: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc<br /> ==================================================================<br /> OF: -&gt; got it !<br /> <br /> Prevent the out-of-bounds read by copying the device address into a<br /> buffer of sufficient size.