security_task_free(9)

📦 version 7.3.1, in nixpkgs unstable

✨ NAME ✨

okay so we're looking at security_task_free(9) — that's section 9, Kernel API Manual, the deep-internals zone bestie 💅

security_task_free — frees a task's LSM blob and all its related resources. like, the whole cleanup era 🧹

🌸 SYNOPSIS 🌸

void security_task_free (struct task_struct *task );

literally one arg, returns nothing, does the freeing. no notes. 🫶

🎀 ARGUMENTS 🎀

  • task — a struct task_struct *. and like... that's it, that's the documentation. the original literally just says "task". no elaboration, no elaboration era, just task 🙈

💖 DESCRIPTION 💖

so what does it actually do? it handles the release of task-related resources. that's the gig. the task's LSM blob and the stuff that hangs out with it get freed here, and honestly? somebody had to do it 🌸

⚠️ ok bestie this is the important bit, do NOT skip it: this can be called from interrupt context. yes, interrupt context. so before you get comfy and assume anything about where you're running, remember that's a real possibility. it's giving "situationship with the scheduler" energy 😭 be normal about it.

no cap, that's the entire description. short queen. iconic. periodt. 👑

🦋 SEE ALSO 🦋

and now... the part where I need you to sit down. the original page has a lot of friends. like a LOT a lot. we're not skipping a single one, so buckle up 🎀

oh, and first up, the actual source file:

  • ./security/security.c — the kernel file this whole family lives in

🧚 the lsm_* allocator girlies

🎀 binder & ptrace & caps (the classics)

💜 misc system-ish hooks

🌈 the exec / bprm crew

🦋 fs_context + superblock girlies

🌸 path hooks

💅 the inode era (this one is LONG, stay with me)

🍓 file / mmap / fcntl vibes

💖 task + creds (our direct neighbours fr fr)

👑 IPC (msg / shm / sem)

🌟 dentry + the secctx / procattr crowd

🧚 notifications & keys

🔥 networking era (huge, I know, we're doing it)

🎀 audit rules

💀 BPF besties

💜 locked_down + bdev

🙈 perf events

⭐ io_uring

🧚‍♀️ and finally, the last one standing

and that's the whole page bestie 🫶 you made it through the entire SEE ALSO list, which honestly deserves a round of applause fr fr 👏

okay and for the sign-off: this one comes from the source ./security, dated October 2026, and it's filed under the footer name security_task_free(9). slay, go free some tasks 💖✨🎀

📦 where this page comes from