ipe_mmap_file(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ipe_mmap_file(9) — like, the Kernel API Manual, bestie 🎀

okay so this is ipe_mmap_file from the Kernel API Manual, and honestly? it's giving gatekeeper energy in the best way possible. let's get into it ✨

🌸 NAME 🌸

ipe_mmap_file — the ipe security hook function for the mmap check. no cap, that's literally her whole job 💅

✨ SYNOPSIS ✨

int ipe_mmap_file (struct file *f , unsigned long reqprot , unsigned
long prot , unsigned long flags );

🦋 ARGUMENTS 🦋

  • f — the file that's being mmap'd, aka the main character here. heads up: this can be NULL when we're dealing with anonymous memory, so don't panic if she's a little empty inside 🙈
  • reqprot — the requested protection on the mmap, handed down straight from usermode. it's giving "what the user thinks they want" 💭
  • prot — the effective protection on the mmap, which gets resolved from reqprot plus the system configuration. so yeah, this is the glow-up version after the system has had its say ✨
  • flags — unused. she's just here for the vibes, not doing anything, lowkey iconic for that 💀

💖 DESCRIPTION 💖

this hook gets called when a file is loaded through the mmap family of system calls. that's it, that's the whole vibe check. whenever the mmap squad rolls up, this function says hi 👋🫶

🔥 RETURN 🔥

  • 0 — Success 💚 slay, we passed, everything's fine and cute
  • -EACCES — Did not pass IPE policy 😭 bestie got blocked at the door, it's a whole thing

🌈 SEE ALSO 🌈

Kernel file ./security/ipe/hooks.c — go read it if you're nosy (respectfully) 👀

ok real talk: if f is NULL, that's the anonymous-memory case — not a bug, not a mistake, just how it is. handle it gracefully, bestie 🫶

that's the whole page, pookie! this one comes from ./security/ipe, dated October 2026, and yes she's filed under ipe_mmap_file(9) — periodt. 🧚💜

📦 where this page comes from