get_task_cred(9)

📦 version 7.3.1, in nixpkgs unstable

💅 get_task_cred — kernel API manual, but make it make sense 🎀

okay bestie, so we're in <pink>get_task_cred(9)</pink> territory — the kernel API manual, section 9, and this is genuinely one of those tiny functions that lowkey holds the whole security model together. no cap. let's get into it 🫶

✨ NAME ✨

get_task_cred — grab another task's objective credentials, the safe way 💖

🌸 SYNOPSIS 🌸

const struct cred * get_task_cred (struct task_struct *task );

that's it. that's the whole vibe check. one argument, one pointer back, and it's const so you can look but you can't touch 👀

🦋 ARGUMENTS 🦋

  • task — the task you're tryna query, bestie. the one whose creds you want. 👑

💜 DESCRIPTION 💜

so here's the tea ☕ — get_task_cred gets you the objective credentials of a task, and it pins them so they literally cannot go away while you're holding them. think of it like grabbing the last strawberry 🍓 in the fridge and putting your name on it. nobody else can take it, nobody's deleting it out from under you. iconic behaviour, honestly.

and listen — accessing a task's credentials directly is not permitted. like, at all. do not pass go, do not collect $200, do not just reach into task->cred like some kind of gremlin 🙈. that's the whole reason this function exists, iykyk.

🚨 real talk though, bestie, this part matters: the caller must also make sure task doesn't get deleted. you've got two options and you gotta pick one, fr fr: - hold a ref on task, or - hold tasklist_lock to stop it from being unlinked. the function pins the creds, not the task. those are two different things and conflating them is giving "I read half the docs" energy 😭. this function will not save you from that mistake. periodt.

🌈 SEE ALSO 🌈

all my besties in ./kernel/cred.c 🧚 — go say hi:

the whole cred cinematic universe, honestly 🔥

🎀 sign-off 🎀

this lil masterpiece lives in <purple>./kernel</purple>, dated October 2026, and it answers to the name get_task_cred(9) 💅. go forth, hold your refs, pin your creds, and never touch task->cred directly again. you're welcome. mwah 🫶💖✨

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