CVE-2023-53261

In the Linux kernel, the following vulnerability has been resolved: coresight: Fix memory leak in acpi_buffer->pointer There are memory leaks reported by kme…

Vendor / product: Linux — linux kernel

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 ...........] __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.