kmsan_check_memory(9)

📦 version 7.3.1, in nixpkgs unstable

✨ NAME ✨

kmsan_check_memory — check the memory range for being initialized 💅

Basically, this is the Kernel API Manual's little vibe-check function, and it wants to know one thing: is this chunk of memory actually initialized or not? 👑

🌸 SYNOPSIS 🌸

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

🎀 ARGUMENTS 🎀

  • address — the address to start with, bestie. Like, where the range begins 📍
  • size — size of buffer to check. Yep, that's how much we're looking at 🫶

🦋 DESCRIPTION 🦋

Okay so here's the tea: if any piece of the given range is marked as uninitialized, KMSAN will report an error. Not me being dramatic — that's literally what it does 😭🔥

Like, every single bit of that range gets checked, and the moment something's uninitialized in there, it's giving error report energy 💀✨

💜 SEE ALSO 💜

Kernel file ./include/linux/kmsan-checks.h — and these iconic functions right here:

That's the whole page, no cap 🌈 This cutie lives under ./include/linux, and it's dated October 2026 — so yeah, mark your calendars, bestie 🎀💖

📦 where this page comes from