security_member_sid(9)

✨ security_member_sid ✨

okay so bestie, this is the Kernel API Manual page for security_member_sid(9) and it's literally the main character of SID computation for member selection 💅

🌸 NAME 🌸

security_member_sid — Compute the SID for member selection.

✨ SYNOPSIS ✨

int security_member_sid (u32 ssid , u32 tsid , u16 tclass , u32 *out_sid );

🎀 ARGUMENTS 🎀

• ssid — source security identifier
• tsid — target security identifier
• tclass — target security class
• out_sid — security identifier for selected member

🦋 DESCRIPTION 🦋

So here's the vibe: this function computes a SID to use when selecting a member of a polyinstantiated object of class tclass based on a SID pair (ssid, tsid). fr fr that's the whole plot 🫶

It returns -EINVAL if any of the parameters are invalid, -ENOMEM if insufficient memory is available, or 0 if the SID was computed successfully. Like, no cap — those are the three possible endings, choose your fighter 😭

🌈 SEE ALSO 🌈

Kernel file ./security/selinux/ss/services.c — and honestly the whole friend group is here, periodt:

• security_compute_av(9)
• security_sid_to_context(9)
• security_sid_to_context_inval(9)
• security_context_to_sid(9)
• security_context_to_sid_default(9)
• security_transition_sid(9)
• security_change_sid(9)
• services_convert_context(9)
• security_load_policy(9)
• ocontext_to_sid(9)
• security_port_sid(9)
• security_ib_pkey_sid(9)
• security_ib_endport_sid(9)
• security_netif_sid(9)
• security_node_sid(9)
• __security_genfs_sid(9)
• security_genfs_sid(9)
• security_fs_use(9)
• security_net_peersid_resolve(9)
• security_policycap_supported(9)
• security_netlbl_cache_add(9)
• security_netlbl_secattr_to_sid(9)
• security_netlbl_sid_to_secattr(9)
• __security_read_policy(9)
• security_read_policy(9)
• security_read_state_kernel(9)

💖 and that's the whole page bestie, iykyk. this iconic little entry lives at ./security/selinux/ss and it's dated October 2026 — so yeah, she's from the future, slay 👑✨