kasan_unpoison(9)

🌸 NAME 🌸

okay so bestie, welcome to kasan_unpoison(9) from the Kernel API Manual — this page is literally about marking memory as accessible 💖.

kasan_unpoison — mark the memory range as accessible ✅

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✨ SYNOPSIS ✨

here's the exact signature, no edits, no cap:

void kasan_unpoison (const void *addr , size_t size , bool init );

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🎀 ARGUMENTS 🎀

okay so the args are giving very specific, bestie:

• addr — range start address, and it must be aligned to KASAN_GRANULE_SIZE 💅
• size — range size, and it can be unaligned, no stress ✨
• init — whether to initialize the memory range (only for hardware tag-based) 👑

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🦋 DESCRIPTION 🦋

so here's the tea ☕: for the tag-based modes, the size gets aligned to KASAN_GRANULE_SIZE before the range gets marked — slay. For the generic mode, the last granule of the memory range gets partially unpoisoned based on the size, periodt 💫.

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🌈 SEE ALSO 🌈

go be nosy, bestie — the squad is right here:

• Kernel file ./mm/kasan/kasan.h 📁
• kasan_check_range(9)
• kasan_poison(9)
• kasan_poison_last_granule(9)

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mwah 💋 this lil page comes from ./mm/kasan, dated October 2026, and it's literally kasan_unpoison(9). periodt 🎀