CVE-2024-46743
Publication date:
18/09/2024
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: -> 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 />
>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: -> got it !<br />
<br />
Prevent the out-of-bounds read by copying the device address into a<br />
buffer of sufficient size.
Severity CVSS v4.0: Pending analysis
Last modification:
03/11/2025