Commit 98e828a0 authored by KP Singh's avatar KP Singh Committed by Daniel Borkmann
Browse files

security: Refactor declaration of LSM hooks 



The information about the different types of LSM hooks is scattered
in two locations i.e. union security_list_options and
struct security_hook_heads. Rather than duplicating this information
even further for BPF_PROG_TYPE_LSM, define all the hooks with the
LSM_HOOK macro in lsm_hook_defs.h which is then used to generate all
the data structures required by the LSM framework.

The LSM hooks are defined as:

  LSM_HOOK(<return_type>, <default_value>, <hook_name>, args...)

with <default_value> acccessible in security.c as:

  LSM_RET_DEFAULT(<hook_name>)

Signed-off-by: default avatarKP Singh <kpsingh@google.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Reviewed-by: default avatarBrendan Jackman <jackmanb@google.com>
Reviewed-by: default avatarFlorent Revest <revest@google.com>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Reviewed-by: default avatarCasey Schaufler <casey@schaufler-ca.com>
Acked-by: default avatarJames Morris <jamorris@linux.microsoft.com>
Link: https://lore.kernel.org/bpf/20200329004356.27286-3-kpsingh@chromium.org
parent fc611f47

include/linux/lsm_hook_defs.h

0 → 100644
+381 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */



/*

 * Linux Security Module Hook declarations.

 *

 * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com>

 * Copyright (C) 2001 Greg Kroah-Hartman <greg@kroah.com>

 * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com>

 * Copyright (C) 2001 James Morris <jmorris@intercode.com.au>

 * Copyright (C) 2001 Silicon Graphics, Inc. (Trust Technology Group)

 * Copyright (C) 2015 Intel Corporation.

 * Copyright (C) 2015 Casey Schaufler <casey@schaufler-ca.com>

 * Copyright (C) 2016 Mellanox Techonologies

 * Copyright (C) 2020 Google LLC.

 */



/*

 * The macro LSM_HOOK is used to define the data structures required by the

 * the LSM framework using the pattern:

 *

 *	LSM_HOOK(<return_type>, <default_value>, <hook_name>, args...)

 *

 * struct security_hook_heads {

 *   #define LSM_HOOK(RET, DEFAULT, NAME, ...) struct hlist_head NAME;

 *   #include <linux/lsm_hook_defs.h>

 *   #undef LSM_HOOK

 * };

 */

LSM_HOOK(int, 0, binder_set_context_mgr, struct task_struct *mgr)

LSM_HOOK(int, 0, binder_transaction, struct task_struct *from,

	 struct task_struct *to)

LSM_HOOK(int, 0, binder_transfer_binder, struct task_struct *from,

	 struct task_struct *to)

LSM_HOOK(int, 0, binder_transfer_file, struct task_struct *from,

	 struct task_struct *to, struct file *file)

LSM_HOOK(int, 0, ptrace_access_check, struct task_struct *child,

	 unsigned int mode)

LSM_HOOK(int, 0, ptrace_traceme, struct task_struct *parent)

LSM_HOOK(int, 0, capget, struct task_struct *target, kernel_cap_t *effective,

	 kernel_cap_t *inheritable, kernel_cap_t *permitted)

LSM_HOOK(int, 0, capset, struct cred *new, const struct cred *old,

	 const kernel_cap_t *effective, const kernel_cap_t *inheritable,

	 const kernel_cap_t *permitted)

LSM_HOOK(int, 0, capable, const struct cred *cred, struct user_namespace *ns,

	 int cap, unsigned int opts)

LSM_HOOK(int, 0, quotactl, int cmds, int type, int id, struct super_block *sb)

LSM_HOOK(int, 0, quota_on, struct dentry *dentry)

LSM_HOOK(int, 0, syslog, int type)

LSM_HOOK(int, 0, settime, const struct timespec64 *ts,

	 const struct timezone *tz)

LSM_HOOK(int, 0, vm_enough_memory, struct mm_struct *mm, long pages)

LSM_HOOK(int, 0, bprm_set_creds, struct linux_binprm *bprm)

LSM_HOOK(int, 0, bprm_check_security, struct linux_binprm *bprm)

LSM_HOOK(void, LSM_RET_VOID, bprm_committing_creds, struct linux_binprm *bprm)

LSM_HOOK(void, LSM_RET_VOID, bprm_committed_creds, struct linux_binprm *bprm)

LSM_HOOK(int, 0, fs_context_dup, struct fs_context *fc,

	 struct fs_context *src_sc)

LSM_HOOK(int, 0, fs_context_parse_param, struct fs_context *fc,

	 struct fs_parameter *param)

LSM_HOOK(int, 0, sb_alloc_security, struct super_block *sb)

LSM_HOOK(void, LSM_RET_VOID, sb_free_security, struct super_block *sb)

LSM_HOOK(void, LSM_RET_VOID, sb_free_mnt_opts, void *mnt_opts)

LSM_HOOK(int, 0, sb_eat_lsm_opts, char *orig, void **mnt_opts)

LSM_HOOK(int, 0, sb_remount, struct super_block *sb, void *mnt_opts)

LSM_HOOK(int, 0, sb_kern_mount, struct super_block *sb)

LSM_HOOK(int, 0, sb_show_options, struct seq_file *m, struct super_block *sb)

LSM_HOOK(int, 0, sb_statfs, struct dentry *dentry)

LSM_HOOK(int, 0, sb_mount, const char *dev_name, const struct path *path,

	 const char *type, unsigned long flags, void *data)

LSM_HOOK(int, 0, sb_umount, struct vfsmount *mnt, int flags)

LSM_HOOK(int, 0, sb_pivotroot, const struct path *old_path,

	 const struct path *new_path)

LSM_HOOK(int, 0, sb_set_mnt_opts, struct super_block *sb, void *mnt_opts,

	 unsigned long kern_flags, unsigned long *set_kern_flags)

LSM_HOOK(int, 0, sb_clone_mnt_opts, const struct super_block *oldsb,

	 struct super_block *newsb, unsigned long kern_flags,

	 unsigned long *set_kern_flags)

LSM_HOOK(int, 0, sb_add_mnt_opt, const char *option, const char *val,

	 int len, void **mnt_opts)

LSM_HOOK(int, 0, move_mount, const struct path *from_path,

	 const struct path *to_path)

LSM_HOOK(int, 0, dentry_init_security, struct dentry *dentry,

	 int mode, const struct qstr *name, void **ctx, u32 *ctxlen)

LSM_HOOK(int, 0, dentry_create_files_as, struct dentry *dentry, int mode,

	 struct qstr *name, const struct cred *old, struct cred *new)



#ifdef CONFIG_SECURITY_PATH

LSM_HOOK(int, 0, path_unlink, const struct path *dir, struct dentry *dentry)

LSM_HOOK(int, 0, path_mkdir, const struct path *dir, struct dentry *dentry,

	 umode_t mode)

LSM_HOOK(int, 0, path_rmdir, const struct path *dir, struct dentry *dentry)

LSM_HOOK(int, 0, path_mknod, const struct path *dir, struct dentry *dentry,

	 umode_t mode, unsigned int dev)

LSM_HOOK(int, 0, path_truncate, const struct path *path)

LSM_HOOK(int, 0, path_symlink, const struct path *dir, struct dentry *dentry,

	 const char *old_name)

LSM_HOOK(int, 0, path_link, struct dentry *old_dentry,

	 const struct path *new_dir, struct dentry *new_dentry)

LSM_HOOK(int, 0, path_rename, const struct path *old_dir,

	 struct dentry *old_dentry, const struct path *new_dir,

	 struct dentry *new_dentry)

LSM_HOOK(int, 0, path_chmod, const struct path *path, umode_t mode)

LSM_HOOK(int, 0, path_chown, const struct path *path, kuid_t uid, kgid_t gid)

LSM_HOOK(int, 0, path_chroot, const struct path *path)

#endif /* CONFIG_SECURITY_PATH */



/* Needed for inode based security check */

LSM_HOOK(int, 0, path_notify, const struct path *path, u64 mask,

	 unsigned int obj_type)

LSM_HOOK(int, 0, inode_alloc_security, struct inode *inode)

LSM_HOOK(void, LSM_RET_VOID, inode_free_security, struct inode *inode)

LSM_HOOK(int, 0, inode_init_security, struct inode *inode,

	 struct inode *dir, const struct qstr *qstr, const char **name,

	 void **value, size_t *len)

LSM_HOOK(int, 0, inode_create, struct inode *dir, struct dentry *dentry,

	 umode_t mode)

LSM_HOOK(int, 0, inode_link, struct dentry *old_dentry, struct inode *dir,

	 struct dentry *new_dentry)

LSM_HOOK(int, 0, inode_unlink, struct inode *dir, struct dentry *dentry)

LSM_HOOK(int, 0, inode_symlink, struct inode *dir, struct dentry *dentry,

	 const char *old_name)

LSM_HOOK(int, 0, inode_mkdir, struct inode *dir, struct dentry *dentry,

	 umode_t mode)

LSM_HOOK(int, 0, inode_rmdir, struct inode *dir, struct dentry *dentry)

LSM_HOOK(int, 0, inode_mknod, struct inode *dir, struct dentry *dentry,

	 umode_t mode, dev_t dev)

LSM_HOOK(int, 0, inode_rename, struct inode *old_dir, struct dentry *old_dentry,

	 struct inode *new_dir, struct dentry *new_dentry)

LSM_HOOK(int, 0, inode_readlink, struct dentry *dentry)

LSM_HOOK(int, 0, inode_follow_link, struct dentry *dentry, struct inode *inode,

	 bool rcu)

LSM_HOOK(int, 0, inode_permission, struct inode *inode, int mask)

LSM_HOOK(int, 0, inode_setattr, struct dentry *dentry, struct iattr *attr)

LSM_HOOK(int, 0, inode_getattr, const struct path *path)

LSM_HOOK(int, 0, inode_setxattr, struct dentry *dentry, const char *name,

	 const void *value, size_t size, int flags)

LSM_HOOK(void, LSM_RET_VOID, inode_post_setxattr, struct dentry *dentry,

	 const char *name, const void *value, size_t size, int flags)

LSM_HOOK(int, 0, inode_getxattr, struct dentry *dentry, const char *name)

LSM_HOOK(int, 0, inode_listxattr, struct dentry *dentry)

LSM_HOOK(int, 0, inode_removexattr, struct dentry *dentry, const char *name)

LSM_HOOK(int, 0, inode_need_killpriv, struct dentry *dentry)

LSM_HOOK(int, 0, inode_killpriv, struct dentry *dentry)

LSM_HOOK(int, -EOPNOTSUPP, inode_getsecurity, struct inode *inode,

	 const char *name, void **buffer, bool alloc)

LSM_HOOK(int, -EOPNOTSUPP, inode_setsecurity, struct inode *inode,

	 const char *name, const void *value, size_t size, int flags)

LSM_HOOK(int, 0, inode_listsecurity, struct inode *inode, char *buffer,

	 size_t buffer_size)

LSM_HOOK(void, LSM_RET_VOID, inode_getsecid, struct inode *inode, u32 *secid)

LSM_HOOK(int, 0, inode_copy_up, struct dentry *src, struct cred **new)

LSM_HOOK(int, 0, inode_copy_up_xattr, const char *name)

LSM_HOOK(int, 0, kernfs_init_security, struct kernfs_node *kn_dir,

	 struct kernfs_node *kn)

LSM_HOOK(int, 0, file_permission, struct file *file, int mask)

LSM_HOOK(int, 0, file_alloc_security, struct file *file)

LSM_HOOK(void, LSM_RET_VOID, file_free_security, struct file *file)

LSM_HOOK(int, 0, file_ioctl, struct file *file, unsigned int cmd,

	 unsigned long arg)

LSM_HOOK(int, 0, mmap_addr, unsigned long addr)

LSM_HOOK(int, 0, mmap_file, struct file *file, unsigned long reqprot,

	 unsigned long prot, unsigned long flags)

LSM_HOOK(int, 0, file_mprotect, struct vm_area_struct *vma,

	 unsigned long reqprot, unsigned long prot)

LSM_HOOK(int, 0, file_lock, struct file *file, unsigned int cmd)

LSM_HOOK(int, 0, file_fcntl, struct file *file, unsigned int cmd,

	 unsigned long arg)

LSM_HOOK(void, LSM_RET_VOID, file_set_fowner, struct file *file)

LSM_HOOK(int, 0, file_send_sigiotask, struct task_struct *tsk,

	 struct fown_struct *fown, int sig)

LSM_HOOK(int, 0, file_receive, struct file *file)

LSM_HOOK(int, 0, file_open, struct file *file)

LSM_HOOK(int, 0, task_alloc, struct task_struct *task,

	 unsigned long clone_flags)

LSM_HOOK(void, LSM_RET_VOID, task_free, struct task_struct *task)

LSM_HOOK(int, 0, cred_alloc_blank, struct cred *cred, gfp_t gfp)

LSM_HOOK(void, LSM_RET_VOID, cred_free, struct cred *cred)

LSM_HOOK(int, 0, cred_prepare, struct cred *new, const struct cred *old,

	 gfp_t gfp)

LSM_HOOK(void, LSM_RET_VOID, cred_transfer, struct cred *new,

	 const struct cred *old)

LSM_HOOK(void, LSM_RET_VOID, cred_getsecid, const struct cred *c, u32 *secid)

LSM_HOOK(int, 0, kernel_act_as, struct cred *new, u32 secid)

LSM_HOOK(int, 0, kernel_create_files_as, struct cred *new, struct inode *inode)

LSM_HOOK(int, 0, kernel_module_request, char *kmod_name)

LSM_HOOK(int, 0, kernel_load_data, enum kernel_load_data_id id)

LSM_HOOK(int, 0, kernel_read_file, struct file *file,

	 enum kernel_read_file_id id)

LSM_HOOK(int, 0, kernel_post_read_file, struct file *file, char *buf,

	 loff_t size, enum kernel_read_file_id id)

LSM_HOOK(int, 0, task_fix_setuid, struct cred *new, const struct cred *old,

	 int flags)

LSM_HOOK(int, 0, task_setpgid, struct task_struct *p, pid_t pgid)

LSM_HOOK(int, 0, task_getpgid, struct task_struct *p)

LSM_HOOK(int, 0, task_getsid, struct task_struct *p)

LSM_HOOK(void, LSM_RET_VOID, task_getsecid, struct task_struct *p, u32 *secid)

LSM_HOOK(int, 0, task_setnice, struct task_struct *p, int nice)

LSM_HOOK(int, 0, task_setioprio, struct task_struct *p, int ioprio)

LSM_HOOK(int, 0, task_getioprio, struct task_struct *p)

LSM_HOOK(int, 0, task_prlimit, const struct cred *cred,

	 const struct cred *tcred, unsigned int flags)

LSM_HOOK(int, 0, task_setrlimit, struct task_struct *p, unsigned int resource,

	 struct rlimit *new_rlim)

LSM_HOOK(int, 0, task_setscheduler, struct task_struct *p)

LSM_HOOK(int, 0, task_getscheduler, struct task_struct *p)

LSM_HOOK(int, 0, task_movememory, struct task_struct *p)

LSM_HOOK(int, 0, task_kill, struct task_struct *p, struct kernel_siginfo *info,

	 int sig, const struct cred *cred)

LSM_HOOK(int, -ENOSYS, task_prctl, int option, unsigned long arg2,

	 unsigned long arg3, unsigned long arg4, unsigned long arg5)

LSM_HOOK(void, LSM_RET_VOID, task_to_inode, struct task_struct *p,

	 struct inode *inode)

LSM_HOOK(int, 0, ipc_permission, struct kern_ipc_perm *ipcp, short flag)

LSM_HOOK(void, LSM_RET_VOID, ipc_getsecid, struct kern_ipc_perm *ipcp,

	 u32 *secid)

LSM_HOOK(int, 0, msg_msg_alloc_security, struct msg_msg *msg)

LSM_HOOK(void, LSM_RET_VOID, msg_msg_free_security, struct msg_msg *msg)

LSM_HOOK(int, 0, msg_queue_alloc_security, struct kern_ipc_perm *perm)

LSM_HOOK(void, LSM_RET_VOID, msg_queue_free_security,

	 struct kern_ipc_perm *perm)

LSM_HOOK(int, 0, msg_queue_associate, struct kern_ipc_perm *perm, int msqflg)

LSM_HOOK(int, 0, msg_queue_msgctl, struct kern_ipc_perm *perm, int cmd)

LSM_HOOK(int, 0, msg_queue_msgsnd, struct kern_ipc_perm *perm,

	 struct msg_msg *msg, int msqflg)

LSM_HOOK(int, 0, msg_queue_msgrcv, struct kern_ipc_perm *perm,

	 struct msg_msg *msg, struct task_struct *target, long type, int mode)

LSM_HOOK(int, 0, shm_alloc_security, struct kern_ipc_perm *perm)

LSM_HOOK(void, LSM_RET_VOID, shm_free_security, struct kern_ipc_perm *perm)

LSM_HOOK(int, 0, shm_associate, struct kern_ipc_perm *perm, int shmflg)

LSM_HOOK(int, 0, shm_shmctl, struct kern_ipc_perm *perm, int cmd)

LSM_HOOK(int, 0, shm_shmat, struct kern_ipc_perm *perm, char __user *shmaddr,

	 int shmflg)

LSM_HOOK(int, 0, sem_alloc_security, struct kern_ipc_perm *perm)

LSM_HOOK(void, LSM_RET_VOID, sem_free_security, struct kern_ipc_perm *perm)

LSM_HOOK(int, 0, sem_associate, struct kern_ipc_perm *perm, int semflg)

LSM_HOOK(int, 0, sem_semctl, struct kern_ipc_perm *perm, int cmd)

LSM_HOOK(int, 0, sem_semop, struct kern_ipc_perm *perm, struct sembuf *sops,

	 unsigned nsops, int alter)

LSM_HOOK(int, 0, netlink_send, struct sock *sk, struct sk_buff *skb)

LSM_HOOK(void, LSM_RET_VOID, d_instantiate, struct dentry *dentry,

	 struct inode *inode)

LSM_HOOK(int, -EINVAL, getprocattr, struct task_struct *p, char *name,

	 char **value)

LSM_HOOK(int, -EINVAL, setprocattr, const char *name, void *value, size_t size)

LSM_HOOK(int, 0, ismaclabel, const char *name)

LSM_HOOK(int, 0, secid_to_secctx, u32 secid, char **secdata,

	 u32 *seclen)

LSM_HOOK(int, 0, secctx_to_secid, const char *secdata, u32 seclen, u32 *secid)

LSM_HOOK(void, LSM_RET_VOID, release_secctx, char *secdata, u32 seclen)

LSM_HOOK(void, LSM_RET_VOID, inode_invalidate_secctx, struct inode *inode)

LSM_HOOK(int, 0, inode_notifysecctx, struct inode *inode, void *ctx, u32 ctxlen)

LSM_HOOK(int, 0, inode_setsecctx, struct dentry *dentry, void *ctx, u32 ctxlen)

LSM_HOOK(int, 0, inode_getsecctx, struct inode *inode, void **ctx,

	 u32 *ctxlen)



#ifdef CONFIG_SECURITY_NETWORK

LSM_HOOK(int, 0, unix_stream_connect, struct sock *sock, struct sock *other,

	 struct sock *newsk)

LSM_HOOK(int, 0, unix_may_send, struct socket *sock, struct socket *other)

LSM_HOOK(int, 0, socket_create, int family, int type, int protocol, int kern)

LSM_HOOK(int, 0, socket_post_create, struct socket *sock, int family, int type,

	 int protocol, int kern)

LSM_HOOK(int, 0, socket_socketpair, struct socket *socka, struct socket *sockb)

LSM_HOOK(int, 0, socket_bind, struct socket *sock, struct sockaddr *address,

	 int addrlen)

LSM_HOOK(int, 0, socket_connect, struct socket *sock, struct sockaddr *address,

	 int addrlen)

LSM_HOOK(int, 0, socket_listen, struct socket *sock, int backlog)

LSM_HOOK(int, 0, socket_accept, struct socket *sock, struct socket *newsock)

LSM_HOOK(int, 0, socket_sendmsg, struct socket *sock, struct msghdr *msg,

	 int size)

LSM_HOOK(int, 0, socket_recvmsg, struct socket *sock, struct msghdr *msg,

	 int size, int flags)

LSM_HOOK(int, 0, socket_getsockname, struct socket *sock)

LSM_HOOK(int, 0, socket_getpeername, struct socket *sock)

LSM_HOOK(int, 0, socket_getsockopt, struct socket *sock, int level, int optname)

LSM_HOOK(int, 0, socket_setsockopt, struct socket *sock, int level, int optname)

LSM_HOOK(int, 0, socket_shutdown, struct socket *sock, int how)

LSM_HOOK(int, 0, socket_sock_rcv_skb, struct sock *sk, struct sk_buff *skb)

LSM_HOOK(int, 0, socket_getpeersec_stream, struct socket *sock,

	 char __user *optval, int __user *optlen, unsigned len)

LSM_HOOK(int, 0, socket_getpeersec_dgram, struct socket *sock,

	 struct sk_buff *skb, u32 *secid)

LSM_HOOK(int, 0, sk_alloc_security, struct sock *sk, int family, gfp_t priority)

LSM_HOOK(void, LSM_RET_VOID, sk_free_security, struct sock *sk)

LSM_HOOK(void, LSM_RET_VOID, sk_clone_security, const struct sock *sk,

	 struct sock *newsk)

LSM_HOOK(void, LSM_RET_VOID, sk_getsecid, struct sock *sk, u32 *secid)

LSM_HOOK(void, LSM_RET_VOID, sock_graft, struct sock *sk, struct socket *parent)

LSM_HOOK(int, 0, inet_conn_request, struct sock *sk, struct sk_buff *skb,

	 struct request_sock *req)

LSM_HOOK(void, LSM_RET_VOID, inet_csk_clone, struct sock *newsk,

	 const struct request_sock *req)

LSM_HOOK(void, LSM_RET_VOID, inet_conn_established, struct sock *sk,

	 struct sk_buff *skb)

LSM_HOOK(int, 0, secmark_relabel_packet, u32 secid)

LSM_HOOK(void, LSM_RET_VOID, secmark_refcount_inc, void)

LSM_HOOK(void, LSM_RET_VOID, secmark_refcount_dec, void)

LSM_HOOK(void, LSM_RET_VOID, req_classify_flow, const struct request_sock *req,

	 struct flowi *fl)

LSM_HOOK(int, 0, tun_dev_alloc_security, void **security)

LSM_HOOK(void, LSM_RET_VOID, tun_dev_free_security, void *security)

LSM_HOOK(int, 0, tun_dev_create, void)

LSM_HOOK(int, 0, tun_dev_attach_queue, void *security)

LSM_HOOK(int, 0, tun_dev_attach, struct sock *sk, void *security)

LSM_HOOK(int, 0, tun_dev_open, void *security)

LSM_HOOK(int, 0, sctp_assoc_request, struct sctp_endpoint *ep,

	 struct sk_buff *skb)

LSM_HOOK(int, 0, sctp_bind_connect, struct sock *sk, int optname,

	 struct sockaddr *address, int addrlen)

LSM_HOOK(void, LSM_RET_VOID, sctp_sk_clone, struct sctp_endpoint *ep,

	 struct sock *sk, struct sock *newsk)

#endif /* CONFIG_SECURITY_NETWORK */



#ifdef CONFIG_SECURITY_INFINIBAND

LSM_HOOK(int, 0, ib_pkey_access, void *sec, u64 subnet_prefix, u16 pkey)

LSM_HOOK(int, 0, ib_endport_manage_subnet, void *sec, const char *dev_name,

	 u8 port_num)

LSM_HOOK(int, 0, ib_alloc_security, void **sec)

LSM_HOOK(void, LSM_RET_VOID, ib_free_security, void *sec)

#endif /* CONFIG_SECURITY_INFINIBAND */



#ifdef CONFIG_SECURITY_NETWORK_XFRM

LSM_HOOK(int, 0, xfrm_policy_alloc_security, struct xfrm_sec_ctx **ctxp,

	 struct xfrm_user_sec_ctx *sec_ctx, gfp_t gfp)

LSM_HOOK(int, 0, xfrm_policy_clone_security, struct xfrm_sec_ctx *old_ctx,

	 struct xfrm_sec_ctx **new_ctx)

LSM_HOOK(void, LSM_RET_VOID, xfrm_policy_free_security,

	 struct xfrm_sec_ctx *ctx)

LSM_HOOK(int, 0, xfrm_policy_delete_security, struct xfrm_sec_ctx *ctx)

LSM_HOOK(int, 0, xfrm_state_alloc, struct xfrm_state *x,

	 struct xfrm_user_sec_ctx *sec_ctx)

LSM_HOOK(int, 0, xfrm_state_alloc_acquire, struct xfrm_state *x,

	 struct xfrm_sec_ctx *polsec, u32 secid)

LSM_HOOK(void, LSM_RET_VOID, xfrm_state_free_security, struct xfrm_state *x)

LSM_HOOK(int, 0, xfrm_state_delete_security, struct xfrm_state *x)

LSM_HOOK(int, 0, xfrm_policy_lookup, struct xfrm_sec_ctx *ctx, u32 fl_secid,

	 u8 dir)

LSM_HOOK(int, 1, xfrm_state_pol_flow_match, struct xfrm_state *x,

	 struct xfrm_policy *xp, const struct flowi *fl)

LSM_HOOK(int, 0, xfrm_decode_session, struct sk_buff *skb, u32 *secid,

	 int ckall)

#endif /* CONFIG_SECURITY_NETWORK_XFRM */



/* key management security hooks */

#ifdef CONFIG_KEYS

LSM_HOOK(int, 0, key_alloc, struct key *key, const struct cred *cred,

	 unsigned long flags)

LSM_HOOK(void, LSM_RET_VOID, key_free, struct key *key)

LSM_HOOK(int, 0, key_permission, key_ref_t key_ref, const struct cred *cred,

	 unsigned perm)

LSM_HOOK(int, 0, key_getsecurity, struct key *key, char **_buffer)

#endif /* CONFIG_KEYS */



#ifdef CONFIG_AUDIT

LSM_HOOK(int, 0, audit_rule_init, u32 field, u32 op, char *rulestr,

	 void **lsmrule)

LSM_HOOK(int, 0, audit_rule_known, struct audit_krule *krule)

LSM_HOOK(int, 0, audit_rule_match, u32 secid, u32 field, u32 op, void *lsmrule)

LSM_HOOK(void, LSM_RET_VOID, audit_rule_free, void *lsmrule)

#endif /* CONFIG_AUDIT */



#ifdef CONFIG_BPF_SYSCALL

LSM_HOOK(int, 0, bpf, int cmd, union bpf_attr *attr, unsigned int size)

LSM_HOOK(int, 0, bpf_map, struct bpf_map *map, fmode_t fmode)

LSM_HOOK(int, 0, bpf_prog, struct bpf_prog *prog)

LSM_HOOK(int, 0, bpf_map_alloc_security, struct bpf_map *map)

LSM_HOOK(void, LSM_RET_VOID, bpf_map_free_security, struct bpf_map *map)

LSM_HOOK(int, 0, bpf_prog_alloc_security, struct bpf_prog_aux *aux)

LSM_HOOK(void, LSM_RET_VOID, bpf_prog_free_security, struct bpf_prog_aux *aux)

#endif /* CONFIG_BPF_SYSCALL */



LSM_HOOK(int, 0, locked_down, enum lockdown_reason what)



#ifdef CONFIG_PERF_EVENTS

LSM_HOOK(int, 0, perf_event_open, struct perf_event_attr *attr, int type)

LSM_HOOK(int, 0, perf_event_alloc, struct perf_event *event)

LSM_HOOK(void, LSM_RET_VOID, perf_event_free, struct perf_event *event)

LSM_HOOK(int, 0, perf_event_read, struct perf_event *event)

LSM_HOOK(int, 0, perf_event_write, struct perf_event *event)

#endif /* CONFIG_PERF_EVENTS */

include/linux/lsm_hooks.h

+12 −616

File changed.

Preview size limit exceeded, changes collapsed.

security/security.c

+30 −11
Original line number Diff line number Diff line
@@ -668,6 +668,25 @@ static void __init lsm_early_task(struct task_struct *task) 
		panic("%s: Early task alloc failed.\n", __func__);

}



/*

 * The default value of the LSM hook is defined in linux/lsm_hook_defs.h and

 * can be accessed with:

 *

 *	LSM_RET_DEFAULT(<hook_name>)

 *

 * The macros below define static constants for the default value of each

 * LSM hook.

 */

#define LSM_RET_DEFAULT(NAME) (NAME##_default)

#define DECLARE_LSM_RET_DEFAULT_void(DEFAULT, NAME)

#define DECLARE_LSM_RET_DEFAULT_int(DEFAULT, NAME) \

	static const int LSM_RET_DEFAULT(NAME) = (DEFAULT);

#define LSM_HOOK(RET, DEFAULT, NAME, ...) \

	DECLARE_LSM_RET_DEFAULT_##RET(DEFAULT, NAME)



#include <linux/lsm_hook_defs.h>

#undef LSM_HOOK



/*

 * Hook list operation macros.

 *
@@ -1338,16 +1357,16 @@ int security_inode_getsecurity(struct inode *inode, const char *name, void **buf 
	int rc;



	if (unlikely(IS_PRIVATE(inode)))

		return -EOPNOTSUPP;

		return LSM_RET_DEFAULT(inode_getsecurity);

	/*

	 * Only one module will provide an attribute with a given name.

	 */

	hlist_for_each_entry(hp, &security_hook_heads.inode_getsecurity, list) {

		rc = hp->hook.inode_getsecurity(inode, name, buffer, alloc);

		if (rc != -EOPNOTSUPP)

		if (rc != LSM_RET_DEFAULT(inode_getsecurity))

			return rc;

	}

	return -EOPNOTSUPP;

	return LSM_RET_DEFAULT(inode_getsecurity);

}



int security_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags)
@@ -1356,17 +1375,17 @@ int security_inode_setsecurity(struct inode *inode, const char *name, const void 
	int rc;



	if (unlikely(IS_PRIVATE(inode)))

		return -EOPNOTSUPP;

		return LSM_RET_DEFAULT(inode_setsecurity);

	/*

	 * Only one module will provide an attribute with a given name.

	 */

	hlist_for_each_entry(hp, &security_hook_heads.inode_setsecurity, list) {

		rc = hp->hook.inode_setsecurity(inode, name, value, size,

								flags);

		if (rc != -EOPNOTSUPP)

		if (rc != LSM_RET_DEFAULT(inode_setsecurity))

			return rc;

	}

	return -EOPNOTSUPP;

	return LSM_RET_DEFAULT(inode_setsecurity);

}



int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
@@ -1740,12 +1759,12 @@ int security_task_prctl(int option, unsigned long arg2, unsigned long arg3, 
			 unsigned long arg4, unsigned long arg5)

{

	int thisrc;

	int rc = -ENOSYS;

	int rc = LSM_RET_DEFAULT(task_prctl);

	struct security_hook_list *hp;



	hlist_for_each_entry(hp, &security_hook_heads.task_prctl, list) {

		thisrc = hp->hook.task_prctl(option, arg2, arg3, arg4, arg5);

		if (thisrc != -ENOSYS) {

		if (thisrc != LSM_RET_DEFAULT(task_prctl)) {

			rc = thisrc;

			if (thisrc != 0)

				break;
@@ -1917,7 +1936,7 @@ int security_getprocattr(struct task_struct *p, const char *lsm, char *name, 
			continue;

		return hp->hook.getprocattr(p, name, value);

	}

	return -EINVAL;

	return LSM_RET_DEFAULT(getprocattr);

}



int security_setprocattr(const char *lsm, const char *name, void *value,
@@ -1930,7 +1949,7 @@ int security_setprocattr(const char *lsm, const char *name, void *value, 
			continue;

		return hp->hook.setprocattr(name, value, size);

	}

	return -EINVAL;

	return LSM_RET_DEFAULT(setprocattr);

}



int security_netlink_send(struct sock *sk, struct sk_buff *skb)
@@ -2315,7 +2334,7 @@ int security_xfrm_state_pol_flow_match(struct xfrm_state *x, 
				       const struct flowi *fl)

{

	struct security_hook_list *hp;

	int rc = 1;

	int rc = LSM_RET_DEFAULT(xfrm_state_pol_flow_match);



	/*

	 * Since this function is expected to return 0 or 1, the judgment

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