In the Linux kernel, the following vulnerability has been resolved: ASoC: Intel: soc-acpi-intel-mtl-match: add missing empty item There is no links_num in struct snd_soc_acpi_mach {}, and we test !link->num_adr as a condition to end the loop in hda_sdw_machine_select(). So an empty item in struct snd_soc_acpi_link_adr array is required.
https://git.kernel.org/stable/c/bf6d7a44a144aa9c476dee83c23faf3151181bab
https://git.kernel.org/stable/c/01281a9e8275946aa725db0919769b8d35af3a11