smack_sk_alloc_security(9)

💖 smack_sk_alloc_security (9) 💖

okay so bestie, this one lives in the Kernel API Manual (section 9, kernel-funcs territory) and it's genuinely such a little guy. like, tiny function, big job. let's get into it ✨

🌸 NAME 🌸

smack_sk_alloc_security — allocate a socket blob 🦋

✨ SYNOPSIS ✨

int smack_sk_alloc_security (struct sock *sk , int family , gfp_t
gfp_flags );

🎀 ARGUMENTS 🎀

• sk — the socket, bestie. the actual socket. that's the one 👑
• family — unused 😭 like it's literally just sitting there. not used. not even a little.
• gfp_flags — the memory allocation flags 🌈 (you know, the usual gfp_t business)

💅 DESCRIPTION 💅

it assigns Smack pointers to current — that's the whole vibe, no cap. 🫶

returns 0 on success, and -ENOMEM if there's no memory 💀 (like when the allocator says "not today")

ngl if you're getting -ENOMEM back, your memory is not slaying. that's the entire story.

🔥 SEE ALSO 🔥

this list is iconic and also lowkey a whole journey — it's from the kernel file ./security/smack/smack_lsm.c, and here's every single friend in the group chat:

• the little helpers: smk_fetch(9), init_inode_smack(9), init_task_smack(9), smk_copy_rules(9), smk_copy_relabel(9)
• ptrace + syslog squad: smk_ptrace_mode(9), smk_ptrace_rule_check(9), smack_ptrace_access_check(9), smack_ptrace_traceme(9), smack_syslog(9)
• superblock & fs_context besties: smack_sb_alloc_security(9), smack_fs_context_submount(9), smack_fs_context_dup(9), smack_fs_context_parse_param(9), smack_set_mnt_opts(9), smack_sb_statfs(9), smack_bprm_creds_for_exec(9)
• inode girlies (there are SO many, they ate): smack_inode_alloc_security(9), smk_rule_transmutes(9), smack_inode_init_security(9), smack_inode_link(9), smack_inode_unlink(9), smack_inode_rmdir(9), smack_inode_rename(9), smack_inode_permission(9), smack_inode_setattr(9), smack_inode_getattr(9), smack_inode_xattr_skipcap(9), smack_inode_setxattr(9), smack_inode_post_setxattr(9), smack_inode_getxattr(9), smack_inode_removexattr(9), smack_inode_set_acl(9), smack_inode_get_acl(9), smack_inode_remove_acl(9), smack_inode_getsecurity(9), smack_inode_listsecurity(9), smack_inode_getlsmprop(9)
• file crew: smack_file_alloc_security(9), smack_file_ioctl(9), smack_file_lock(9), smack_file_fcntl(9), smack_mmap_file(9), smack_file_set_fowner(9), smack_file_send_sigiotask(9), smack_file_receive(9), smack_file_open(9)
• creds: smack_cred_alloc_blank(9), smack_cred_free(9), smack_cred_prepare(9), smack_cred_transfer(9), smack_cred_getsecid(9), smack_cred_getlsmprop(9), smack_kernel_act_as(9), smack_kernel_create_files_as(9), smk_curacc_on_task(9)
• task mains: smack_task_setpgid(9), smack_task_getpgid(9), smack_task_getsid(9), smack_current_getlsmprop_subj(9), smack_task_getlsmprop_obj(9), smack_task_setnice(9), smack_task_setioprio(9), smack_task_getioprio(9), smack_task_setscheduler(9), smack_task_getscheduler(9), smack_task_movememory(9), smack_task_kill(9), smack_task_to_inode(9)
• socket & netlabel girlies: smack_sk_free_security(9), smack_sk_clone_security(9), smack_ipv4host_label(9), smack_ipv6host_label(9), smack_netlbl_add(9), smack_netlbl_delete(9), smk_ipv4_check(9), smk_ipv6_check(9), smk_ipv6_port_label(9), smk_ipv6_port_check(9), smack_inode_setsecurity(9), smack_socket_post_create(9), smack_socket_socketpair(9), smack_socket_bind(9), smack_socket_connect(9), smack_flags_to_may(9)
• IPC (shm + sem + msg, all of them, no skips): smack_msg_msg_alloc_security(9), smack_of_ipc(9), smack_ipc_alloc_security(9), smk_curacc_shm(9), smack_shm_associate(9), smack_shm_shmctl(9), smack_shm_shmat(9), smk_curacc_sem(9), smack_sem_associate(9), smack_sem_semctl(9), smack_sem_semop(9), smk_tskacc_msq(9), smk_curacc_msq(9), smack_msg_queue_associate(9), smack_msg_queue_msgctl(9), smack_msg_queue_msgsnd(9), smack_msg_queue_msgrcv(9), smack_ipc_permission(9), smack_ipc_getlsmprop(9)
• dentry + procattr besties: smack_d_instantiate(9), smack_getselfattr(9), smack_getprocattr(9), do_setattr(9), smack_setselfattr(9), smack_setprocattr(9)
• network stack icons: smack_unix_stream_connect(9), smack_unix_may_send(9), smack_socket_sendmsg(9), smack_from_secattr(9), smack_from_skb(9), smack_from_netlbl(9), smack_socket_sock_rcv_skb(9), smack_socket_getpeersec_stream(9), smack_socket_getpeersec_dgram(9), smack_inet_conn_request(9), smack_inet_csk_clone(9)
• keys & notifications: smack_key_alloc(9), smack_key_permission(9), smack_watch_key(9), smack_post_notification(9)
• audit trio: smack_audit_rule_init(9), smack_audit_rule_known(9), smack_audit_rule_match(9)
• labels & secctx: smack_ismaclabel(9), smack_to_secctx(9), smack_secid_to_secctx(9), smack_lsmprop_to_secctx(9), smack_secctx_to_secid(9)
• io_uring crew: smack_uring_override_creds(9), smack_uring_sqpoll(9), smack_uring_cmd(9)
• and the final boss: smack_init(9) ⭐

okay that's the whole page, mwah 💜 this came out of ./security/smack, dated October 2026, and it's section 9 of the Kernel API Manual — so go forth and allocate your socket blob, bestie. slay. 🎀✨💅