instrument_c..._user_before(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, welcome to instrument_c..._user_before(9) from the Kernel API Manual 💅 this is your lil group-chat crash course, no cap ✨

🎀 NAME 🎀

instrument_copy_from_user_before — add instrumentation before copy_from_user 🫶

✨ SYNOPSIS ✨

void instrument_copy_from_user_before (const void *to , const void __user *from , unsigned long n );

🌸 ARGUMENTS 🌸

  • to — destination address 📍
  • from — source address 📍
  • n — number of bytes to copy 🔢

💖 DESCRIPTION 💖

okay so this one instruments writes to kernel memory that are due to copy_from_user (and variants). the instrumentation should be inserted before the accesses, bestie — like, before, not after, periodt 💅✨

lowkey important vibe check: this is instrumentation for those writes, and it belongs before the accesses 👑

🦋 SEE ALSO 🦋

the kernel file is ./include/linux/instrumented.h, and the whole squad is:

source/version: ./include/linux • date: October 2026 • page: instrument_c..._user_before(9) — bye bestie, go instrument slayfully 💖🎀

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