ipe_file_mprotect(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ipe_file_mprotect(9) — like, the whole vibe

Okay bestie, gather round, because this is the ipe_file_mprotect page from the Kernel API Manual and it's literally the security hook that does the vibe check when your memory tries to change its whole personality. No cap. 🦋

✨ NAME ✨

ipe_file_mprotect — the ipe security hook function for mprotect check. That's it, that's the whole thing, she's an icon and she's here to keep an eye on things. 👑

🌸 SYNOPSIS 🌸

int ipe_file_mprotect (struct vm_area_struct *vma , unsigned long
reqprot , unsigned long prot );

Like, she takes three things and returns an int. Short and sweet, main character energy fr fr. 💖

🎀 ARGUMENTS 🎀

  • vma — an existing virtual memory area, created by mmap or something similar, you know the drill. This is the region in question, the one we're all looking at. 👀
  • reqprot — the requested protection on the mmap, passed down from usermode. So like, what the program asked for, okay? 🙈
  • prot — the effective protection on the mmap, resolved from reqprot and the system configuration. Which lowkey means: what it actually ends up being after the system has had opinions. ✨

🦋 DESCRIPTION 🦋

This LSM hook gets called when a mmap'd region of memory is changing its protections via mprotect. The way that memory region is just out here reinventing itself mid-flight and this hook is standing there like "excuse me?? permission check first bestie". 💅

🔥 RETURN 🔥

  • 0 — success! Slay, it went through, no notes. ✅
  • -EACCES — did not pass IPE policy. Not today, bestie, the policy said no and the policy is not flexible about it. 💀

🌈 SEE ALSO 🌈

Kernel file ./security/ipe/hooks.c, plus the whole friend group:

Go read them, iykyk. 🫶

Alright bestie, that's the page — brought to you by ./security/ipe, the October 2026 edition of this iconic little manual, filed under ipe_file_mprotect(9). Now go forth and check those protections, mwah. 😭💜

📦 where this page comes from