kmsan_unpoison_entry_regs(9)

📦 version 7.3.1, in nixpkgs unstable

💅 kmsan_unpoison_entry_regs — Kernel API Manual 💅

okay so bestie, welcome to the kmsan_unpoison_entry_regs page, it's a little one but she's iconic ✨ this lives in the Kernel API Manual, and honestly it's giving "short but crucial" energy 🎀

🌸 NAME 🌸

kmsan_unpoison_entry_regs — handle pt_regs in low-level entry code 💖

✨ SYNOPSIS ✨

void kmsan_unpoison_entry_regs (const struct pt_regs *regs );

🦋 ARGUMENTS 🦋

  • regs — a struct pt_regs pointer that you got straight from assembly code, no cap 🫶

💅 DESCRIPTION 💅

so basically, KMSAN unpoisons the contents of the pt_regs you pass in, and the whole point of that is to stop potential false positive reports from happening 😭 she's out here clearing the vibes so the error detector doesn't start drama over nothing, periodt.

and here's the main character detail 🔥 — unlike kmsan_unpoison_memory, this function kmsan_unpoison_entry_regs can be called from the regions where kmsan_in_runtime returns true, which is literally the case in early entry code. so like, she's the one you call when you're in the no-go zone and the regular function can't come with you 💀 iykyk.

ngl, that runtime restriction is the whole reason this function exists separately — don't try to swap in kmsan_unpoison_memory and hope for the best, she will not survive early entry code 🙈

👑 SEE ALSO 👑

kernel file ./include/linux/kmsan.h, plus the whole friend group 🌈:

and that's the whole page bestie, you ate that 🍓 this lil drop came from ./include/linux and is dated October 2026 — mwah, see you in the next manpage 💜🧚⭐

📦 where this page comes from