In the Linux kernel, the following vulnerability has been resolved: coresight: Fix memory leak in acpibuffer->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 ...........kmemcacheallocnode+0x2f8/0x348 [<00000000b0fc7ceb>] _kmalloc+0x58/0x108 [<0000000064ff4695>] acpiosallocate+0x2c/0x68 [<000000007d57d116>] acpiutinitializebuffer+0x54/0xe0 [<0000000024583908>] acpievaluateobject+0x388/0x438 [<0000000017b2e72b>] acpievaluateobjecttyped+0xe8/0x240 [<000000005df0eac2>] coresightgetplatformdata+0x1b4/0x988 [coresight] ... The ACPI buffer memory (buf.pointer) should be freed. But the buffer is also used after returning from acpigetdsdgraph(). Move the temporary variables buf to acpicoresightparse_graph(), and free it before the function return to prevent memory leak.