lsm_msg_msg_alloc(9)

📦 version 7.3.1, in nixpkgs unstable

💖 lsm_msg_msg_alloc(9) 💖

okay so welcome to the Kernel API Manual, bestie — this one's a lil function page and it's honestly kind of a supportive friend. It shows up, grabs some memory for the LSM blob situation, and dips. No drama. We love a low-maintenance icon. 🎀

✨ NAME ✨

lsm_msg_msg_alloc — allocate a composite msg_msg blob

🦋 SYNOPSIS 🦋

int lsm_msg_msg_alloc (struct msg_msg *mp );

(no, the spacing is not a typo, that's just how it's written, leave it alone 💅)

🌸 ARGUMENTS 🌸

  • mp — the msg_msg that needs a blob. that's it. that's the whole argument. she just needs a blob. 🫶

🔥 DESCRIPTION 🔥

so what does it actually do? it allocates the ipc blob for all the modules. that's the whole assignment. all of them. the entire group chat gets a blob. 😭

  • returns 0 when it ate and left no crumbs
  • returns -ENOMEM if memory can't be allocated
lowkey important: that -ENOMEM is the "couldn't get the memory" signal, okay? don't ignore it. if you get 0 you're golden, if you get -ENOMEM the allocation did not happen. no cap.

👑 SEE ALSO 👑

kernel file ./security/security.c, plus literally the entire extended universe of security hooks. buckle up bestie, this list is giving "invited the whole contact list to the party" 🌈

🧚 the lsm_* helper girlies 💜

🎀 binder, ptrace, caps 'n' quotas 'n' misc 🍓

💅 exec stuff + filesystem context + superblock 💫

🦋 paths 'n' inodes (the long one, stay with me) 🧚

🍓 files, mmap 'n' friends ⭐

💜 tasks, creds 'n' kernel doings 🫶

🌸 IPC girlies (this page's home turf) 🎀

🧚 secctx 'n' attr 'n' notification 💫

🌈 networking (sockets, skbs, sctp, the works) 🔥

🦋 infiniband 'n' xfrm 🌸

🎀 keys, audit rules 'n' bpf 💅

⭐ the final stretch 🍓

okay that's the whole page bestie, you made it, I'm so proud 🫶✨ and for the credits moment: this little masterpiece lives under ./security in the source, dated October 2026, and it's filed as lsm_msg_msg_alloc(9). mwah 💋 periodt 💅

📦 where this page comes from