CVE-2023-53261
Beschrijving NL
In the Linux kernel, the following vulnerability has been resolved:
coresight: Fix memory leak in acpi_buffer->pointer
There are memory leaks reported by kmemleak:
... unreferenced object 0xffff00213c141000 (size 1024):
comm "systemd-udevd", pid 2123, jiffies 4294909467 (age 6062.160s)
hex dump (first 32 bytes):
04 00 00 00 02 00 00 00 18 10 14 3c 21 00 ff ff ...........<!... 00 00 00 00 00 00 00 00 03 00 00 00 10 00 00 00 ................ backtrace:
[] __kmem_cache_alloc_node+0x2f8/0x348
[] __kmalloc+0x58/0x108
[] acpi_os_allocate+0x2c/0x68
[] acpi_ut_initialize_buffer+0x54/0xe0
[] acpi_evaluate_object+0x388/0x438
[] acpi_evaluate_object_typed+0xe8/0x240
[] coresight_get_platform_data+0x1b4/0x988 [coresight]
... The ACPI buffer memory (buf.pointer) should be freed. But the buffer
is also used after returning from acpi_get_dsd_graph(). Move the temporary variables buf to acpi_coresight_parse_graph(),
and free it before the function return to prevent memory leak.
Origineel (Engels) tonen
In the Linux kernel, the following vulnerability has been resolved:
coresight: Fix memory leak in acpi_buffer->pointer
There are memory leaks reported by kmemleak:
...
unreferenced object 0xffff00213c141000 (size 1024):
comm "systemd-udevd", pid 2123, jiffies 4294909467 (age 6062.160s)
hex dump (first 32 bytes):
04 00 00 00 02 00 00 00 18 10 14 3c 21 00 ff ff ...........<!...
00 00 00 00 00 00 00 00 03 00 00 00 10 00 00 00 ................
backtrace:
[] __kmem_cache_alloc_node+0x2f8/0x348
[] __kmalloc+0x58/0x108
[] acpi_os_allocate+0x2c/0x68
[] acpi_ut_initialize_buffer+0x54/0xe0
[] acpi_evaluate_object+0x388/0x438
[] acpi_evaluate_object_typed+0xe8/0x240
[] coresight_get_platform_data+0x1b4/0x988 [coresight]
...
The ACPI buffer memory (buf.pointer) should be freed. But the buffer
is also used after returning from acpi_get_dsd_graph().
Move the temporary variables buf to acpi_coresight_parse_graph(),
and free it before the function return to prevent memory leak.