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Copy pathcapability.c
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1074 lines (907 loc) · 23.3 KB
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/*
* Capabilities Linux Security Module
*
* This is the default security module in case no other module is loaded.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/security.h>
static int cap_syslog(int type)
{
return 0;
}
static int cap_quotactl(int cmds, int type, int id, struct super_block *sb)
{
return 0;
}
static int cap_quota_on(struct dentry *dentry)
{
return 0;
}
static int cap_bprm_check_security(struct linux_binprm *bprm)
{
return 0;
}
static void cap_bprm_committing_creds(struct linux_binprm *bprm)
{
}
static void cap_bprm_committed_creds(struct linux_binprm *bprm)
{
}
static int cap_sb_alloc_security(struct super_block *sb)
{
return 0;
}
static void cap_sb_free_security(struct super_block *sb)
{
}
static int cap_sb_copy_data(char *orig, char *copy)
{
return 0;
}
static int cap_sb_remount(struct super_block *sb, void *data)
{
return 0;
}
static int cap_sb_kern_mount(struct super_block *sb, int flags, void *data)
{
return 0;
}
static int cap_sb_show_options(struct seq_file *m, struct super_block *sb)
{
return 0;
}
static int cap_sb_statfs(struct dentry *dentry)
{
return 0;
}
static int cap_sb_mount(char *dev_name, struct path *path, char *type,
unsigned long flags, void *data)
{
return 0;
}
static int cap_sb_umount(struct vfsmount *mnt, int flags)
{
return 0;
}
static int cap_sb_pivotroot(struct path *old_path, struct path *new_path)
{
return 0;
}
static int cap_sb_set_mnt_opts(struct super_block *sb,
struct security_mnt_opts *opts)
{
if (unlikely(opts->num_mnt_opts))
return -EOPNOTSUPP;
return 0;
}
static void cap_sb_clone_mnt_opts(const struct super_block *oldsb,
struct super_block *newsb)
{
}
static int cap_sb_parse_opts_str(char *options, struct security_mnt_opts *opts)
{
return 0;
}
static int cap_inode_alloc_security(struct inode *inode)
{
return 0;
}
static void cap_inode_free_security(struct inode *inode)
{
}
static int cap_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
void **value, size_t *len)
{
return -EOPNOTSUPP;
}
static int cap_inode_create(struct inode *inode, struct dentry *dentry,
umode_t mask)
{
return 0;
}
static int cap_inode_link(struct dentry *old_dentry, struct inode *inode,
struct dentry *new_dentry)
{
return 0;
}
static int cap_inode_unlink(struct inode *inode, struct dentry *dentry)
{
return 0;
}
static int cap_inode_symlink(struct inode *inode, struct dentry *dentry,
const char *name)
{
return 0;
}
static int cap_inode_mkdir(struct inode *inode, struct dentry *dentry,
umode_t mask)
{
return 0;
}
static int cap_inode_rmdir(struct inode *inode, struct dentry *dentry)
{
return 0;
}
static int cap_inode_mknod(struct inode *inode, struct dentry *dentry,
umode_t mode, dev_t dev)
{
return 0;
}
static int cap_inode_rename(struct inode *old_inode, struct dentry *old_dentry,
struct inode *new_inode, struct dentry *new_dentry)
{
return 0;
}
static int cap_inode_readlink(struct dentry *dentry)
{
return 0;
}
static int cap_inode_follow_link(struct dentry *dentry,
struct nameidata *nameidata)
{
return 0;
}
static int cap_inode_permission(struct inode *inode, int mask)
{
return 0;
}
static int cap_inode_setattr(struct dentry *dentry, struct iattr *iattr)
{
return 0;
}
static int cap_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
{
return 0;
}
static void cap_inode_post_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
}
static int cap_inode_getxattr(struct dentry *dentry, const char *name)
{
return 0;
}
static int cap_inode_listxattr(struct dentry *dentry)
{
return 0;
}
static int cap_inode_getsecurity(const struct inode *inode, const char *name,
void **buffer, bool alloc)
{
return -EOPNOTSUPP;
}
static int cap_inode_setsecurity(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
return -EOPNOTSUPP;
}
static int cap_inode_listsecurity(struct inode *inode, char *buffer,
size_t buffer_size)
{
return 0;
}
static void cap_inode_getsecid(const struct inode *inode, u32 *secid)
{
*secid = 0;
}
#ifdef CONFIG_SECURITY_PATH
static int cap_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
unsigned int dev)
{
return 0;
}
static int cap_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
{
return 0;
}
static int cap_path_rmdir(struct path *dir, struct dentry *dentry)
{
return 0;
}
static int cap_path_unlink(struct path *dir, struct dentry *dentry)
{
return 0;
}
static int cap_path_symlink(struct path *dir, struct dentry *dentry,
const char *old_name)
{
return 0;
}
static int cap_path_link(struct dentry *old_dentry, struct path *new_dir,
struct dentry *new_dentry)
{
return 0;
}
static int cap_path_rename(struct path *old_path, struct dentry *old_dentry,
struct path *new_path, struct dentry *new_dentry)
{
return 0;
}
static int cap_path_truncate(struct path *path)
{
return 0;
}
static int cap_path_chmod(struct path *path, umode_t mode)
{
return 0;
}
static int cap_path_chown(struct path *path, uid_t uid, gid_t gid)
{
return 0;
}
static int cap_path_chroot(struct path *root)
{
return 0;
}
#endif
static int cap_file_permission(struct file *file, int mask)
{
return 0;
}
static int cap_file_alloc_security(struct file *file)
{
return 0;
}
static void cap_file_free_security(struct file *file)
{
}
static int cap_file_ioctl(struct file *file, unsigned int command,
unsigned long arg)
{
return 0;
}
static int cap_file_mprotect(struct vm_area_struct *vma, unsigned long reqprot,
unsigned long prot)
{
return 0;
}
static int cap_file_lock(struct file *file, unsigned int cmd)
{
return 0;
}
static int cap_file_fcntl(struct file *file, unsigned int cmd,
unsigned long arg)
{
return 0;
}
static int cap_file_set_fowner(struct file *file)
{
return 0;
}
static int cap_file_send_sigiotask(struct task_struct *tsk,
struct fown_struct *fown, int sig)
{
return 0;
}
static int cap_file_receive(struct file *file)
{
return 0;
}
static int cap_dentry_open(struct file *file, const struct cred *cred)
{
return 0;
}
static int cap_task_create(unsigned long clone_flags)
{
return 0;
}
static void cap_task_free(struct task_struct *task)
{
}
static int cap_cred_alloc_blank(struct cred *cred, gfp_t gfp)
{
return 0;
}
static void cap_cred_free(struct cred *cred)
{
}
static int cap_cred_prepare(struct cred *new, const struct cred *old, gfp_t gfp)
{
return 0;
}
static void cap_cred_transfer(struct cred *new, const struct cred *old)
{
}
static int cap_kernel_act_as(struct cred *new, u32 secid)
{
return 0;
}
static int cap_kernel_create_files_as(struct cred *new, struct inode *inode)
{
return 0;
}
static int cap_kernel_module_request(char *kmod_name)
{
return 0;
}
static int cap_task_setpgid(struct task_struct *p, pid_t pgid)
{
return 0;
}
static int cap_task_getpgid(struct task_struct *p)
{
return 0;
}
static int cap_task_getsid(struct task_struct *p)
{
return 0;
}
static void cap_task_getsecid(struct task_struct *p, u32 *secid)
{
*secid = 0;
}
static int cap_task_getioprio(struct task_struct *p)
{
return 0;
}
static int cap_task_setrlimit(struct task_struct *p, unsigned int resource,
struct rlimit *new_rlim)
{
return 0;
}
static int cap_task_getscheduler(struct task_struct *p)
{
return 0;
}
static int cap_task_movememory(struct task_struct *p)
{
return 0;
}
static int cap_task_wait(struct task_struct *p)
{
return 0;
}
static int cap_task_kill(struct task_struct *p, struct siginfo *info,
int sig, u32 secid)
{
return 0;
}
static void cap_task_to_inode(struct task_struct *p, struct inode *inode)
{
}
static int cap_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
{
return 0;
}
static void cap_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
{
*secid = 0;
}
static int cap_msg_msg_alloc_security(struct msg_msg *msg)
{
return 0;
}
static void cap_msg_msg_free_security(struct msg_msg *msg)
{
}
static int cap_msg_queue_alloc_security(struct msg_queue *msq)
{
return 0;
}
static void cap_msg_queue_free_security(struct msg_queue *msq)
{
}
static int cap_msg_queue_associate(struct msg_queue *msq, int msqflg)
{
return 0;
}
static int cap_msg_queue_msgctl(struct msg_queue *msq, int cmd)
{
return 0;
}
static int cap_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
int msgflg)
{
return 0;
}
static int cap_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
struct task_struct *target, long type, int mode)
{
return 0;
}
static int cap_shm_alloc_security(struct shmid_kernel *shp)
{
return 0;
}
static void cap_shm_free_security(struct shmid_kernel *shp)
{
}
static int cap_shm_associate(struct shmid_kernel *shp, int shmflg)
{
return 0;
}
static int cap_shm_shmctl(struct shmid_kernel *shp, int cmd)
{
return 0;
}
static int cap_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr,
int shmflg)
{
return 0;
}
static int cap_sem_alloc_security(struct sem_array *sma)
{
return 0;
}
static void cap_sem_free_security(struct sem_array *sma)
{
}
static int cap_sem_associate(struct sem_array *sma, int semflg)
{
return 0;
}
static int cap_sem_semctl(struct sem_array *sma, int cmd)
{
return 0;
}
static int cap_sem_semop(struct sem_array *sma, struct sembuf *sops,
unsigned nsops, int alter)
{
return 0;
}
#ifdef CONFIG_SECURITY_NETWORK
static int cap_unix_stream_connect(struct sock *sock, struct sock *other,
struct sock *newsk)
{
return 0;
}
static int cap_unix_may_send(struct socket *sock, struct socket *other)
{
return 0;
}
static int cap_socket_create(int family, int type, int protocol, int kern)
{
return 0;
}
static int cap_socket_post_create(struct socket *sock, int family, int type,
int protocol, int kern)
{
return 0;
}
static int cap_socket_bind(struct socket *sock, struct sockaddr *address,
int addrlen)
{
return 0;
}
static int cap_socket_connect(struct socket *sock, struct sockaddr *address,
int addrlen)
{
return 0;
}
static int cap_socket_listen(struct socket *sock, int backlog)
{
return 0;
}
static int cap_socket_accept(struct socket *sock, struct socket *newsock)
{
return 0;
}
static int cap_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
{
return 0;
}
static int cap_socket_recvmsg(struct socket *sock, struct msghdr *msg,
int size, int flags)
{
return 0;
}
static int cap_socket_getsockname(struct socket *sock)
{
return 0;
}
static int cap_socket_getpeername(struct socket *sock)
{
return 0;
}
static int cap_socket_setsockopt(struct socket *sock, int level, int optname)
{
return 0;
}
static int cap_socket_getsockopt(struct socket *sock, int level, int optname)
{
return 0;
}
static int cap_socket_shutdown(struct socket *sock, int how)
{
return 0;
}
static int cap_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
return 0;
}
static int cap_socket_getpeersec_stream(struct socket *sock,
char __user *optval,
int __user *optlen, unsigned len)
{
return -ENOPROTOOPT;
}
static int cap_socket_getpeersec_dgram(struct socket *sock,
struct sk_buff *skb, u32 *secid)
{
return -ENOPROTOOPT;
}
static int cap_sk_alloc_security(struct sock *sk, int family, gfp_t priority)
{
return 0;
}
static void cap_sk_free_security(struct sock *sk)
{
}
static void cap_sk_clone_security(const struct sock *sk, struct sock *newsk)
{
}
static void cap_sk_getsecid(struct sock *sk, u32 *secid)
{
}
static void cap_sock_graft(struct sock *sk, struct socket *parent)
{
}
static int cap_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
return 0;
}
static void cap_inet_csk_clone(struct sock *newsk,
const struct request_sock *req)
{
}
static void cap_inet_conn_established(struct sock *sk, struct sk_buff *skb)
{
}
static int cap_secmark_relabel_packet(u32 secid)
{
return 0;
}
static void cap_secmark_refcount_inc(void)
{
}
static void cap_secmark_refcount_dec(void)
{
}
static void cap_req_classify_flow(const struct request_sock *req,
struct flowi *fl)
{
}
static int cap_tun_dev_create(void)
{
return 0;
}
static void cap_tun_dev_post_create(struct sock *sk)
{
}
static int cap_tun_dev_attach(struct sock *sk)
{
return 0;
}
#endif /* CONFIG_SECURITY_NETWORK */
#ifdef CONFIG_SECURITY_NETWORK_XFRM
static int cap_xfrm_policy_alloc_security(struct xfrm_sec_ctx **ctxp,
struct xfrm_user_sec_ctx *sec_ctx)
{
return 0;
}
static int cap_xfrm_policy_clone_security(struct xfrm_sec_ctx *old_ctx,
struct xfrm_sec_ctx **new_ctxp)
{
return 0;
}
static void cap_xfrm_policy_free_security(struct xfrm_sec_ctx *ctx)
{
}
static int cap_xfrm_policy_delete_security(struct xfrm_sec_ctx *ctx)
{
return 0;
}
static int cap_xfrm_state_alloc_security(struct xfrm_state *x,
struct xfrm_user_sec_ctx *sec_ctx,
u32 secid)
{
return 0;
}
static void cap_xfrm_state_free_security(struct xfrm_state *x)
{
}
static int cap_xfrm_state_delete_security(struct xfrm_state *x)
{
return 0;
}
static int cap_xfrm_policy_lookup(struct xfrm_sec_ctx *ctx, u32 sk_sid, u8 dir)
{
return 0;
}
static int cap_xfrm_state_pol_flow_match(struct xfrm_state *x,
struct xfrm_policy *xp,
const struct flowi *fl)
{
return 1;
}
static int cap_xfrm_decode_session(struct sk_buff *skb, u32 *fl, int ckall)
{
return 0;
}
#endif /* CONFIG_SECURITY_NETWORK_XFRM */
static void cap_d_instantiate(struct dentry *dentry, struct inode *inode)
{
}
static int cap_getprocattr(struct task_struct *p, char *name, char **value)
{
return -EINVAL;
}
static int cap_setprocattr(struct task_struct *p, char *name, void *value,
size_t size)
{
return -EINVAL;
}
static int cap_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
{
return -EOPNOTSUPP;
}
static int cap_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
{
*secid = 0;
return 0;
}
static void cap_release_secctx(char *secdata, u32 seclen)
{
}
static int cap_inode_notifysecctx(struct inode *inode, void *ctx, u32 ctxlen)
{
return 0;
}
static int cap_inode_setsecctx(struct dentry *dentry, void *ctx, u32 ctxlen)
{
return 0;
}
static int cap_inode_getsecctx(struct inode *inode, void **ctx, u32 *ctxlen)
{
return 0;
}
#ifdef CONFIG_KEYS
static int cap_key_alloc(struct key *key, const struct cred *cred,
unsigned long flags)
{
return 0;
}
static void cap_key_free(struct key *key)
{
}
static int cap_key_permission(key_ref_t key_ref, const struct cred *cred,
key_perm_t perm)
{
return 0;
}
static int cap_key_getsecurity(struct key *key, char **_buffer)
{
*_buffer = NULL;
return 0;
}
#endif /* CONFIG_KEYS */
#ifdef CONFIG_AUDIT
static int cap_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
{
return 0;
}
static int cap_audit_rule_known(struct audit_krule *krule)
{
return 0;
}
static int cap_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
struct audit_context *actx)
{
return 0;
}
static void cap_audit_rule_free(void *lsmrule)
{
}
#endif /* CONFIG_AUDIT */
#define set_to_cap_if_null(ops, function) \
do { \
if (!ops->function) { \
ops->function = cap_##function; \
pr_debug("Had to override the " #function \
" security operation with the default.\n");\
} \
} while (0)
void __init security_fixup_ops(struct security_operations *ops)
{
set_to_cap_if_null(ops, ptrace_access_check);
set_to_cap_if_null(ops, ptrace_traceme);
set_to_cap_if_null(ops, capget);
set_to_cap_if_null(ops, capset);
set_to_cap_if_null(ops, capable);
set_to_cap_if_null(ops, quotactl);
set_to_cap_if_null(ops, quota_on);
set_to_cap_if_null(ops, syslog);
set_to_cap_if_null(ops, settime);
set_to_cap_if_null(ops, vm_enough_memory);
set_to_cap_if_null(ops, bprm_set_creds);
set_to_cap_if_null(ops, bprm_committing_creds);
set_to_cap_if_null(ops, bprm_committed_creds);
set_to_cap_if_null(ops, bprm_check_security);
set_to_cap_if_null(ops, bprm_secureexec);
set_to_cap_if_null(ops, sb_alloc_security);
set_to_cap_if_null(ops, sb_free_security);
set_to_cap_if_null(ops, sb_copy_data);
set_to_cap_if_null(ops, sb_remount);
set_to_cap_if_null(ops, sb_kern_mount);
set_to_cap_if_null(ops, sb_show_options);
set_to_cap_if_null(ops, sb_statfs);
set_to_cap_if_null(ops, sb_mount);
set_to_cap_if_null(ops, sb_umount);
set_to_cap_if_null(ops, sb_pivotroot);
set_to_cap_if_null(ops, sb_set_mnt_opts);
set_to_cap_if_null(ops, sb_clone_mnt_opts);
set_to_cap_if_null(ops, sb_parse_opts_str);
set_to_cap_if_null(ops, inode_alloc_security);
set_to_cap_if_null(ops, inode_free_security);
set_to_cap_if_null(ops, inode_init_security);
set_to_cap_if_null(ops, inode_create);
set_to_cap_if_null(ops, inode_link);
set_to_cap_if_null(ops, inode_unlink);
set_to_cap_if_null(ops, inode_symlink);
set_to_cap_if_null(ops, inode_mkdir);
set_to_cap_if_null(ops, inode_rmdir);
set_to_cap_if_null(ops, inode_mknod);
set_to_cap_if_null(ops, inode_rename);
set_to_cap_if_null(ops, inode_readlink);
set_to_cap_if_null(ops, inode_follow_link);
set_to_cap_if_null(ops, inode_permission);
set_to_cap_if_null(ops, inode_setattr);
set_to_cap_if_null(ops, inode_getattr);
set_to_cap_if_null(ops, inode_setxattr);
set_to_cap_if_null(ops, inode_post_setxattr);
set_to_cap_if_null(ops, inode_getxattr);
set_to_cap_if_null(ops, inode_listxattr);
set_to_cap_if_null(ops, inode_removexattr);
set_to_cap_if_null(ops, inode_need_killpriv);
set_to_cap_if_null(ops, inode_killpriv);
set_to_cap_if_null(ops, inode_getsecurity);
set_to_cap_if_null(ops, inode_setsecurity);
set_to_cap_if_null(ops, inode_listsecurity);
set_to_cap_if_null(ops, inode_getsecid);
#ifdef CONFIG_SECURITY_PATH
set_to_cap_if_null(ops, path_mknod);
set_to_cap_if_null(ops, path_mkdir);
set_to_cap_if_null(ops, path_rmdir);
set_to_cap_if_null(ops, path_unlink);
set_to_cap_if_null(ops, path_symlink);
set_to_cap_if_null(ops, path_link);
set_to_cap_if_null(ops, path_rename);
set_to_cap_if_null(ops, path_truncate);
set_to_cap_if_null(ops, path_chmod);
set_to_cap_if_null(ops, path_chown);
set_to_cap_if_null(ops, path_chroot);
#endif
set_to_cap_if_null(ops, file_permission);
set_to_cap_if_null(ops, file_alloc_security);
set_to_cap_if_null(ops, file_free_security);
set_to_cap_if_null(ops, file_ioctl);
set_to_cap_if_null(ops, file_mmap);
set_to_cap_if_null(ops, file_mprotect);
set_to_cap_if_null(ops, file_lock);
set_to_cap_if_null(ops, file_fcntl);
set_to_cap_if_null(ops, file_set_fowner);
set_to_cap_if_null(ops, file_send_sigiotask);
set_to_cap_if_null(ops, file_receive);
set_to_cap_if_null(ops, dentry_open);
set_to_cap_if_null(ops, task_create);
set_to_cap_if_null(ops, task_free);
set_to_cap_if_null(ops, cred_alloc_blank);
set_to_cap_if_null(ops, cred_free);
set_to_cap_if_null(ops, cred_prepare);
set_to_cap_if_null(ops, cred_transfer);
set_to_cap_if_null(ops, kernel_act_as);
set_to_cap_if_null(ops, kernel_create_files_as);
set_to_cap_if_null(ops, kernel_module_request);
set_to_cap_if_null(ops, task_fix_setuid);
set_to_cap_if_null(ops, task_setpgid);
set_to_cap_if_null(ops, task_getpgid);
set_to_cap_if_null(ops, task_getsid);
set_to_cap_if_null(ops, task_getsecid);
set_to_cap_if_null(ops, task_setnice);
set_to_cap_if_null(ops, task_setioprio);
set_to_cap_if_null(ops, task_getioprio);
set_to_cap_if_null(ops, task_setrlimit);
set_to_cap_if_null(ops, task_setscheduler);
set_to_cap_if_null(ops, task_getscheduler);
set_to_cap_if_null(ops, task_movememory);
set_to_cap_if_null(ops, task_wait);
set_to_cap_if_null(ops, task_kill);
set_to_cap_if_null(ops, task_prctl);
set_to_cap_if_null(ops, task_to_inode);
set_to_cap_if_null(ops, ipc_permission);
set_to_cap_if_null(ops, ipc_getsecid);
set_to_cap_if_null(ops, msg_msg_alloc_security);
set_to_cap_if_null(ops, msg_msg_free_security);
set_to_cap_if_null(ops, msg_queue_alloc_security);
set_to_cap_if_null(ops, msg_queue_free_security);
set_to_cap_if_null(ops, msg_queue_associate);
set_to_cap_if_null(ops, msg_queue_msgctl);
set_to_cap_if_null(ops, msg_queue_msgsnd);
set_to_cap_if_null(ops, msg_queue_msgrcv);
set_to_cap_if_null(ops, shm_alloc_security);
set_to_cap_if_null(ops, shm_free_security);
set_to_cap_if_null(ops, shm_associate);
set_to_cap_if_null(ops, shm_shmctl);
set_to_cap_if_null(ops, shm_shmat);
set_to_cap_if_null(ops, sem_alloc_security);
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