__kfence_obj_info(9)

📦 version 7.3.1, in nixpkgs unstable

💜 __kfence_obj_info — from the Kernel API Manual, bestie ✨

okay so picture this: it's giving "tell me everything about this object" but make it KFENCE. this little function is the one that fills in your kmem_obj_info struct when the object in question happens to be living that KFENCE life. literally it's the info desk for KFENCE objects and i'm obsessed 🎀

🌸 SYNOPSIS 🌸

bool __kfence_obj_info (struct kmem_obj_info *kpp , void *object ,
       struct slab *slab );

no cap, that's the whole signature. she's a bool, she takes three things, she's out. main character energy fr fr 💅

🦋 ARGUMENTS 🦋

okay so here's who's who in this group chat 👑

  • kpp — the kmem_obj_info that's getting filled up. she's the empty cup, bestie, and we're pouring info into her 🍓
  • object — the object. yeah. that one. the object in question 🙈
  • slab — the slab. the slab that the whole situation is happening in ✨

⭐ RETURN ⭐

she hands you back a bool, and it's basically a vibe check on whether this thing is KFENCE or not:

  • false — nope, not a KFENCE object. move along, nothing to see here 💀
  • true — yesss, it's a KFENCE object, and kpp has been filled. slay 🎉
lowkey the whole point: the return value is the answer, and the side effect is the filled kpp. don't sleep on it 👑

🌈 DESCRIPTION 🌈

so what she actually does, in the simplest terms: she copies information into kpp for KFENCE objects. that's it. that's the whole job. iconic behaviour honestly, no notes 🫶

🧚 SEE ALSO 🧚

first up, the kernel file herself: ./include/linux/kfence.h — go say hi, she has lore 💖

and then the whole KFENCE friend group, all tagged in the same thread:

iykyk, read the whole set, it's giving "found family" 🦋

mwah okay that's the page 💋 — it lives under ./include/linux, it's from October 2026, and it's page __kfence_obj_info(9) of the Kernel API Manual. go forth and fill those structs, bestie 🌸👑

📦 where this page comes from