clone3_stack_valid(9)

💅 clone3_stack_valid — Kernel API Manual 🎀

okay bestie, welcome to the clone3_stack_valid(9) page ✨ (yes that's the manual name, we're fancy here). this is the little helper that looks at your stack before anything spicy happens. let's get into it 🦋

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✨ NAME ✨

clone3_stack_valid — check and prepare stack 🫶

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🌸 SYNOPSIS 🌸

bool clone3_stack_valid (struct kernel_clone_args *kargs );

that's it. one function, returns a bool, takes one pointer. lowkey elegant ngl 💅

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💖 ARGUMENTS 💖

• kargs — the kernel clone args 🧚. literally the struct holding everything the clone is working with. that's the whole vibe of this parameter, iykyk.

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👑 DESCRIPTION 👑

so here's the tea ☕: this function does a vibe check on the stack arguments that userspace handed over to us. it verifies they're sane — no cap, that's the actual job 💀. if something's off, the check says so.

and then!! because we're already in there, it also sets the stack direction for userspace — since it's easy for us to determine, we just go ahead and do it for them 🌈. generous? iconic? both. periodt.

heads up bestie: this is a check and a setup situation — it doesn't just look, it also prepares. don't forget the second part, fr fr 🍓

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🔥 SEE ALSO 🔥

• Kernel file ./kernel/fork.c 📂
• set_mm_exe_file(9)
• replace_mm_exe_file(9)
• get_mm_exe_file(9)
• get_task_exe_file(9)
• get_task_mm(9)
• dup_mm(9)
• pidfd_prepare(9)
• sys_clone3(9)

go read those too, they're all in the same friend group 💜 (all of them are (9), yes, matching set 🎀)

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⭐ the cute sign-off ⭐

this lil page lives in the ./kernel source tree, version-dated October 2026, and it's filed under clone3_stack_valid(9) in case you need to find it again 🦋. mwah, go forth and clone responsibly 💖✨