kmsan_unpoison_memory(9)

💖 kmsan_unpoison_memory(9) 💖

okay so bestie, welcome to the Kernel API Manual side of the group chat — this page is all about kmsan_unpoison_memory, and it’s lowkey iconic. 💅

✨ NAME ✨

kmsan_unpoison_memory — mark the memory range as initialized. That’s it, that’s the whole assignment. 💖

🦋 SYNOPSIS 🦋

void kmsan_unpoison_memory (const void *address , size_t size );

🎀 ARGUMENTS 🎀

• address — the address to start with, bestie. Like, where the range begins. 📍
• size — the size of the buffer to unpoison. That’s how much buffer we’re unpoisoning. 🫶

💜 DESCRIPTION 💜

Here’s the tea: until other data is written to this range, KMSAN will treat it as initialized. No cap. So this is the “okay bestie, you’re initialized now” move for that memory range. ✨

🌈 SEE ALSO 🌈

Kernel file ./include/linux/kmsan-checks.h is right there, and the related pages are kmsan_poison_memory(9), kmsan_check_memory(9), kmsan_copy_to_user(9), and kmsan_memmove(9). Go read them, iykyk. 💅

okay that’s the whole page, bestie 🫶 — source/version: ./include/linux, dated October 2026, and the page is kmsan_unpoison_memory(9) from the Kernel API Manual. Mwah 💋