__policy_strn_find(9)

✨ NAME ✨

okay bestie, this is __policy_strn_find(9) from the Kernel API Manual — the AppArmor helper whose whole vibe is: find a policy that's name matches @len chars of @str 💅. Yes, the grammar is doing cardio, but the mission is clear: match a policy by a chunk of its name 🎀.

🌸 SYNOPSIS 🌸

struct aa_policy * __policy_strn_find (struct list_head *head , const
       char *str , int len );

🎀 ARGUMENTS 🎀

• head — list to search (NOT NULL) 🔍
• str — string to search for (NOT NULL) 🧚
• len — length of match required 📏

🦋 DESCRIPTION 🦋

Requires: rcu_read_lock be held — no cap, lock it before you come through, bestie 🔒.

Here's the tea: if len == strlen(strlen) then this is equiv to __policy_find; otherwise it allows searching for policy by a partial match of name. The way that one little branch changes the whole search vibe? iconic ✨.

strlen(strlen) is literally what the page says, so I'm passing it to you exactly like that — do not come for me, I'm just the messenger 💀.

👑 RETURN 👑

It returns an unrefcounted policy that match str, or NULL if not found 🫶. That's the whole return story — no extra lore, no secret refcount glow-up 😭.

🌈 SEE ALSO 🌈

• Kernel file ./security/apparmor/include/lib.h
• aa_strneq(9)
• aa_dfa_null_transition(9)
• basename(9)
• __policy_find(9)

xoxo, signing off — source/version ./security/apparmor/include, dated October 2026, from the Kernel API Manual, page __policy_strn_find(9) 💖🎀