I was unable to fetch the commit information from the provided GitLab URL or the patch file due to access restrictions (bot detection). The available information from security advisories describes the vulnerability's nature (out-of-bounds write due to integer overflow when parsing font subglyph structures in TrueType GX and variable font files) but does not provide specific function names or code snippets. Without access to the code changes, I cannot confidently identify the vulnerable functions or provide evidence from the patch.