bpf_crypto_ctx_acquire(9)

💖 bpf_crypto_ctx_acquire(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, we're being fancy today 👑 — and this page is all about bpf_crypto_ctx_acquire, the little kfunc that hands you a reference like it's passing you the aux cord 🎧✨

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🌸 NAME 🌸

bpf_crypto_ctx_acquire — acquire a reference to a BPF crypto context. that's it, that's the whole vibe 💅

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🎀 SYNOPSIS 🎀

__bpf_kfunc struct bpf_crypto_ctx * bpf_crypto_ctx_acquire (struct
bpf_crypto_ctx *ctx );

literally the whole signature, copied exactly, no cap 🫶

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🦋 ARGUMENTS 🦋

• ctx — the BPF crypto context being acquired 💖 and important detail: ctx must be a trusted pointer. like, trusted trusted. don't be out here passing it random pointers, that's not the move 🙈

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✨ DESCRIPTION ✨

So what does it do? It acquires a reference to a BPF crypto context. iconic behavior, honestly 🔥

But here's the part you cannot skip, bestie — the context returned by this function must either be:

• embedded in a map as a kptr, or
• freed with bpf_crypto_ctx_release

that's a hard either/or, not a suggestion. the way that this is mandatory and not vibes-based 😭 please don't leak it, the kernel will not be slaying with you 💀

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🌈 SEE ALSO 🌈

• Kernel file ./kernel/bpf/crypto.c
• struct bpf_crypto_params(9)
• struct bpf_crypto_ctx(9)
• bpf_crypto_ctx_create(9)
• bpf_crypto_ctx_release(9)
• bpf_crypto_decrypt(9)
• bpf_crypto_encrypt(9)

go read the whole friend group, they all ate 💅🍓

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and that's a wrap, bestie 🎀 this page lives in ./kernel/bpf and it's dated October 2026, and yes the footer is being extra and repeating bpf_crypto_ctx_acquire(9) at us again — main character energy fr fr 👑💜