__strn_find_child(9)

💖 NAME 💖

okay so this is __strn_find_child(9) from the Kernel API Manual, and its whole personality is: find a profile on the @head list using a substring of @name 💅✨. That's the mission, bestie — list head, name, substring length, go find the matching profile.

✨ SYNOPSIS ✨

struct aa_profile * __strn_find_child (struct list_head *head , const
char *name , int len );

🎀 ARGUMENTS 🎀

• head — list to search, and it is NOT NULL — like, do not come in here with a null head, no cap 🫶.
• name — name of profile, also NOT NULL — null name? not today, bestie 🙈.
• len — length of name substring to match. That's the substring-energy you're matching with, periodt.

🦋 DESCRIPTION 🦋

Requires: rcu_read_lock be held.

That's not a suggestion, bestie — Requires: rcu_read_lock be held. So hold that lock before you go searching. iykyk 🔥.

🌸 RETURN 🌸

It returns an unrefcounted profile ptr, or NULL if not found. That's it — pointer if it finds your profile, NULL if not, and the pointer is unrefcounted. Slay 💖.

🔥 SEE ALSO 🔥

Kernel file ./security/apparmor/policy.c — plus the whole reference squad, because we are listing every single one:

• aa_pdb_free_kref(9)
• __add_profile(9)
• __list_remove_profile(9)
• __remove_profile(9)
• __aa_profile_list_release(9)
• aa_free_data(9)
• aa_free_profile(9)
• aa_alloc_profile(9)
• __find_child(9)
• aa_find_child(9)
• __lookup_parent(9)
• __create_missing_ancestors(9)
• __lookupn_profile(9)
• aa_lookupn_profile(9)
• __aa_new_learning_profile(9)
• replacement_allowed(9)
• audit_policy(9)
• aa_policy_view_capable(9)
• aa_may_manage_policy(9)
• __replace_profile(9)
• __lookup_replace(9)
• aa_replace_profiles(9)
• aa_remove_profiles(9)

source/version: ./security/apparmor · date: October 2026 — mwah, bestie, go hold that rcu_read_lock and slay 💖✨