kasan_poison(9)

🎀 kasan_poison(9) — Kernel API Manual 🎀

✨ NAME ✨

kasan_poison — mark the memory range as inaccessible. that's the whole vibe: it's the function that slaps the “nope, not accessible” label on a memory range, and honestly? iconic. 💅

🦋 SYNOPSIS 🦋

okay so the signature is literally this, bestie — copy it exactly:

void kasan_poison (const void *addr , size_t size , u8 value , bool init
);

🌸 ARGUMENTS 🌸

• addr — range start address, and it must be aligned to KASAN_GRANULE_SIZE. no cap, alignment is not optional here.
• size — range size, and it must be aligned to KASAN_GRANULE_SIZE. same energy as addr, fr fr.
• value — value that's written to metadata for the range. that's the exact tea. 🍓
• init — whether to initialize the memory range (only for hardware tag-based). yes, that parenthetical is part of the lore. ✨

🌈 SEE ALSO 🌈

Kernel file ./mm/kasan/kasan.h is right there in the mix, plus the besties kasan_check_range(9), kasan_unpoison(9), and kasan_poison_last_granule(9). iykyk 👑

okay that's the whole page, ily — source/version ./mm/kasan, date October 2026, mwah 💋✨