security_inode_copy_up(9)

💅 security_inode_copy_up — from the Kernel API Manual, section 9, bestie 🎀

okay so real quick before we dive in: this one lives in the Kernel API Manual, section 9, and it's genuinely one of the more lowkey-glam heist plots in the whole security layer. overlayfs is doing a little copy-up, and the LSM gets to hand over a fresh set of creds like it's passing a bestie a new outfit. obsessed. ✨

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🦋 NAME

security_inode_copy_up — make brand-new creds for an overlayfs copy-up operation 💳✨

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🌸 SYNOPSIS

int security_inode_copy_up (struct dentry *src , struct cred **new );

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💜 ARGUMENTS

• src — the union dentry of the file being copied up 🗂️
• new — the shiny newly created creds 🆕

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🔥 DESCRIPTION

so picture this: a file is literally about to be copied up from the lower layer to the upper layer of an overlay filesystem. main character moment for that file ngl.

And here's where the security module steps in — it can prepare a whole new set of creds, modify them however it needs to, and then hand the new creds back. the caller will then switch over to those new creds temporarily so it can create the new file, and afterward it releases the newly allocated creds.

temporary glow-up, then clean up after yourself. we love a responsible icon. 💅✨

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⭐ RETURN

returns 0 on success, or a negative error code if something went wrong 😭 (0 good, negative bad, that's the whole vibe check)

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👑 SEE ALSO

okay bestie, strap in, because this list is long and it ate. every single one of these is in the Kernel file ./security/security.c 🫶

lsm_file_alloc(9), lsm_backing_file_alloc(9), lsm_blob_alloc(9), lsm_cred_alloc(9), lsm_inode_alloc(9), lsm_task_alloc(9), lsm_ipc_alloc(9), lsm_key_alloc(9), lsm_msg_msg_alloc(9), lsm_bdev_alloc(9), lsm_bpf_map_alloc(9), lsm_bpf_prog_alloc(9), lsm_bpf_token_alloc(9), lsm_superblock_alloc(9), lsm_fill_user_ctx(9), security_binder_set_context_mgr(9), security_binder_transaction(9), security_binder_transfer_binder(9), security_binder_transfer_file(9), security_ptrace_access_check(9), security_ptrace_traceme(9), security_capget(9), security_capset(9), security_capable(9), security_quotactl(9), security_quota_on(9), security_syslog(9), security_settime64(9), security_vm_enough_memory_mm(9), security_bprm_creds_for_exec(9), security_bprm_creds_from_file(9), security_bprm_check(9), security_bprm_committing_creds(9), security_bprm_committed_creds(9), security_fs_context_submount(9), security_fs_context_dup(9), security_fs_context_parse_param(9), security_sb_alloc(9), security_sb_delete(9), security_sb_free(9), security_free_mnt_opts(9), security_sb_eat_lsm_opts(9), security_sb_mnt_opts_compat(9), security_sb_remount(9), security_sb_kern_mount(9), security_sb_show_options(9), security_sb_statfs(9), security_sb_mount(9), security_sb_umount(9), security_sb_pivotroot(9), security_sb_set_mnt_opts(9), security_sb_clone_mnt_opts(9), security_move_mount(9), security_path_notify(9), security_inode_alloc(9), security_inode_free(9), security_dentry_init_security(9), security_dentry_create_files_as(9), security_inode_init_security(9), security_inode_init_security_anon(9), security_path_mknod(9), security_path_post_mknod(9), security_path_mkdir(9), security_path_rmdir(9), security_path_unlink(9), security_path_symlink(9), security_path_link(9), security_path_rename(9), security_path_truncate(9), security_path_chmod(9), security_path_chown(9), security_path_chroot(9), security_inode_create(9), security_inode_post_create_tmpfile(9), security_inode_link(9), security_inode_unlink(9), security_inode_symlink(9), security_inode_mkdir(9), security_inode_rmdir(9), security_inode_mknod(9), security_inode_rename(9), security_inode_readlink(9), security_inode_follow_link(9), security_inode_permission(9), security_inode_setattr(9), security_inode_post_setattr(9), security_inode_getattr(9), security_inode_setxattr(9), security_inode_set_acl(9), security_inode_post_set_acl(9), security_inode_get_acl(9), security_inode_remove_acl(9), security_inode_post_remove_acl(9), security_inode_post_setxattr(9), security_inode_getxattr(9), security_inode_listxattr(9), security_inode_removexattr(9), security_inode_post_removexattr(9), security_inode_file_setattr(9), security_inode_file_getattr(9), security_inode_need_killpriv(9), security_inode_killpriv(9), security_inode_getsecurity(9), security_inode_setsecurity(9), security_inode_listsecurity(9), security_inode_getlsmprop(9), security_inode_copy_up_xattr(9), security_inode_setintegrity(9), security_kernfs_init_security(9), security_file_permission(9), security_file_alloc(9), security_file_release(9), security_file_free(9), security_backing_file_alloc(9), security_backing_file_free(9), security_file_ioctl(9), security_file_ioctl_compat(9), security_mmap_file(9), security_mmap_backing_file(9), security_mmap_addr(9), security_file_mprotect(9), security_file_lock(9), security_file_fcntl(9), security_file_set_fowner(9), security_file_send_sigiotask(9), security_file_receive(9), security_file_open(9), security_file_post_open(9), security_file_truncate(9), security_task_alloc(9), security_task_free(9), security_cred_alloc_blank(9), security_cred_free(9), security_prepare_creds(9), security_transfer_creds(9), security_cred_getsecid(9), security_cred_getlsmprop(9), security_kernel_act_as(9), security_kernel_create_files_as(9), security_kernel_module_request(9), security_kernel_read_file(9), security_kernel_post_read_file(9), security_kernel_load_data(9), security_kernel_post_load_data(9), security_task_fix_setuid(9), security_task_fix_setgid(9), security_task_fix_setgroups(9), security_task_setpgid(9), security_task_getpgid(9), security_task_getsid(9), security_current_getlsmprop_subj(9), security_task_getlsmprop_obj(9), security_task_setnice(9), security_task_setioprio(9), security_task_getioprio(9), security_task_prlimit(9), security_task_setrlimit(9), security_task_setscheduler(9), security_task_getscheduler(9), security_task_movememory(9), security_task_kill(9), security_task_prctl(9), security_task_to_inode(9), security_create_user_ns(9), security_ipc_permission(9), security_ipc_getlsmprop(9), security_msg_msg_alloc(9), security_msg_msg_free(9), security_msg_queue_alloc(9), security_msg_queue_free(9), security_msg_queue_associate(9), security_msg_queue_msgctl(9), security_msg_queue_msgsnd(9), security_msg_queue_msgrcv(9), security_shm_alloc(9), security_shm_free(9), security_shm_associate(9), security_shm_shmctl(9), security_shm_shmat(9), security_sem_alloc(9), security_sem_free(9), security_sem_associate(9), security_sem_semctl(9), security_sem_semop(9), security_d_instantiate(9), security_getselfattr(9), security_setselfattr(9), security_getprocattr(9), security_setprocattr(9), security_ismaclabel(9), security_secid_to_secctx(9), security_lsmprop_to_secctx(9), security_secctx_to_secid(9), security_release_secctx(9), security_inode_invalidate_secctx(9), security_inode_notifysecctx(9), security_inode_setsecctx(9), security_inode_getsecctx(9), security_post_notification(9), security_watch_key(9), security_netlink_send(9), security_unix_stream_connect(9), security_unix_may_send(9), security_socket_create(9), security_socket_post_create(9), security_socket_socketpair(9), security_socket_bind(9), security_socket_connect(9), security_socket_listen(9), security_socket_accept(9), security_socket_sendmsg(9), security_socket_recvmsg(9), security_socket_getsockname(9), security_socket_getpeername(9), security_socket_getsockopt(9), security_socket_setsockopt(9), security_socket_shutdown(9), security_sock_rcv_skb(9), security_socket_getpeersec_stream(9), security_socket_getpeersec_dgram(9), lsm_sock_alloc(9), security_sk_alloc(9), security_sk_free(9), security_sk_clone(9), security_sk_classify_flow(9), security_req_classify_flow(9), security_sock_graft(9), security_inet_conn_request(9), security_inet_csk_clone(9), security_inet_conn_established(9), security_secmark_relabel_packet(9), security_secmark_refcount_inc(9), security_secmark_refcount_dec(9), security_tun_dev_alloc_security(9), security_tun_dev_free_security(9), security_tun_dev_create(9), security_tun_dev_attach_queue(9), security_tun_dev_attach(9), security_tun_dev_open(9), security_sctp_assoc_request(9), security_sctp_bind_connect(9), security_sctp_sk_clone(9), security_sctp_assoc_established(9), security_mptcp_add_subflow(9), security_unix_find(9), security_ib_pkey_access(9), security_ib_endport_manage_subnet(9), security_ib_alloc_security(9), security_ib_free_security(9), security_xfrm_policy_alloc(9), security_xfrm_policy_clone(9), security_xfrm_policy_free(9), security_xfrm_policy_delete(9), security_xfrm_state_alloc(9), security_xfrm_state_alloc_acquire(9), security_xfrm_state_delete(9), security_xfrm_state_free(9), security_xfrm_policy_lookup(9), security_xfrm_state_pol_flow_match(9), security_xfrm_decode_session(9), security_key_alloc(9), security_key_free(9), security_key_permission(9), security_key_getsecurity(9), security_key_post_create_or_update(9), security_audit_rule_init(9), security_audit_rule_known(9), security_audit_rule_free(9), security_audit_rule_match(9), security_bpf(9), security_bpf_map(9), security_bpf_prog(9), security_bpf_map_create(9), security_bpf_prog_load(9), security_bpf_token_create(9), security_bpf_token_cmd(9), security_bpf_token_capable(9), security_bpf_map_free(9), security_bpf_prog_free(9), security_bpf_token_free(9), security_locked_down(9), security_bdev_alloc(9), security_bdev_free(9), security_bdev_setintegrity(9), security_perf_event_open(9), security_perf_event_alloc(9), security_perf_event_free(9), security_perf_event_read(9), security_perf_event_write(9), security_uring_override_creds(9), security_uring_sqpoll(9), security_uring_cmd(9), security_uring_allowed(9), security_initramfs_populated(9)

not me listing three hundred cross-references like it's a playlist 😭 but fr fr they're all there, go read them, iykyk 💀🫶

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and that's the whole page, bestie!! 🌈 source is ./security, dated October 2026, and it's section 9 of the manual — so next time you see security_inode_copy_up(9) you'll know exactly what's giving. slay, stay hydrated, and may your creds always be freshly allocated 💖🧚✨