/* * Stub functions for the default security function pointers in case no * security model is loaded. * * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> * Copyright (C) 2001-2002  Greg Kroah-Hartman <greg@kroah.com> * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> * *	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. */ #undef DEBUG #include <linux/capability.h>#include <linux/config.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/mman.h>#include <linux/pagemap.h>#include <linux/swap.h>#include <linux/security.h>#include <linux/skbuff.h>#include <linux/netlink.h>#include <net/sock.h>#include <linux/xattr.h>#include <linux/hugetlb.h>#include <linux/ptrace.h>#include <linux/file.h> static int dummy_ptrace (struct task_struct *parent, struct task_struct *child){	return 0;} static int dummy_capget (struct task_struct *target, kernel_cap_t * effective,			 kernel_cap_t * inheritable, kernel_cap_t * permitted){	*effective = *inheritable = *permitted = 0;	if (!issecure(SECURE_NOROOT)) {		if (target->euid == 0) {			*permitted |= (~0 & ~CAP_FS_MASK);			*effective |= (~0 & ~CAP_TO_MASK(CAP_SETPCAP) & ~CAP_FS_MASK);		}		if (target->fsuid == 0) {			*permitted |= CAP_FS_MASK;			*effective |= CAP_FS_MASK;		}	}	return 0;} static int dummy_capset_check (struct task_struct *target,			       kernel_cap_t * effective,			       kernel_cap_t * inheritable,			       kernel_cap_t * permitted){	return -EPERM;} static void dummy_capset_set (struct task_struct *target,			      kernel_cap_t * effective,			      kernel_cap_t * inheritable,			      kernel_cap_t * permitted){	return;} static int dummy_acct (struct file *file){	return 0;} static int dummy_capable (struct task_struct *tsk, int cap){	if (cap_raised (tsk->cap_effective, cap))		return 0;	return -EPERM;} static int dummy_sysctl (ctl_table * table, int op){	return 0;} static int dummy_quotactl (int cmds, int type, int id, struct super_block *sb){	return 0;} static int dummy_quota_on (struct dentry *dentry){	return 0;} static int dummy_syslog (int type){	if ((type != 3 && type != 10) && current->euid)		return -EPERM;	return 0;} static int dummy_settime(struct timespec *ts, struct timezone *tz){	if (!capable(CAP_SYS_TIME))		return -EPERM;	return 0;} static int dummy_vm_enough_memory(long pages){	int cap_sys_admin = 0; 	if (dummy_capable(current, CAP_SYS_ADMIN) == 0)		cap_sys_admin = 1;	return __vm_enough_memory(pages, cap_sys_admin);} static int dummy_bprm_alloc_security (struct linux_binprm *bprm){	return 0;} static void dummy_bprm_free_security (struct linux_binprm *bprm){	return;} static void dummy_bprm_apply_creds (struct linux_binprm *bprm, int unsafe){	if (bprm->e_uid != current->uid || bprm->e_gid != current->gid) {		current->mm->dumpable = suid_dumpable; 		if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {			bprm->e_uid = current->uid;			bprm->e_gid = current->gid;		}	} 	current->suid = current->euid = current->fsuid = bprm->e_uid;	current->sgid = current->egid = current->fsgid = bprm->e_gid; 	dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);} static void dummy_bprm_post_apply_creds (struct linux_binprm *bprm){	return;} static int dummy_bprm_set_security (struct linux_binprm *bprm){	return 0;} static int dummy_bprm_check_security (struct linux_binprm *bprm){	return 0;} static int dummy_bprm_secureexec (struct linux_binprm *bprm){	/* The new userland will simply use the value provided	   in the AT_SECURE field to decide whether secure mode	   is required.  Hence, this logic is required to preserve	   the legacy decision algorithm used by the old userland. */	return (current->euid != current->uid ||		current->egid != current->gid);} static int dummy_sb_alloc_security (struct super_block *sb){	return 0;} static void dummy_sb_free_security (struct super_block *sb){	return;} static int dummy_sb_copy_data (struct file_system_type *type,			       void *orig, void *copy){	return 0;} static int dummy_sb_kern_mount (struct super_block *sb, void *data){	return 0;} static int dummy_sb_statfs (struct super_block *sb){	return 0;} static int dummy_sb_mount (char *dev_name, struct nameidata *nd, char *type,			   unsigned long flags, void *data){	return 0;} static int dummy_sb_check_sb (struct vfsmount *mnt, struct nameidata *nd){	return 0;} static int dummy_sb_umount (struct vfsmount *mnt, int flags){	return 0;} static void dummy_sb_umount_close (struct vfsmount *mnt){	return;} static void dummy_sb_umount_busy (struct vfsmount *mnt){	return;} static void dummy_sb_post_remount (struct vfsmount *mnt, unsigned long flags,				   void *data){	return;}  static void dummy_sb_post_mountroot (void){	return;} static void dummy_sb_post_addmount (struct vfsmount *mnt, struct nameidata *nd){	return;} static int dummy_sb_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd){	return 0;} static void dummy_sb_post_pivotroot (struct nameidata *old_nd, struct nameidata *new_nd){	return;} static int dummy_inode_alloc_security (struct inode *inode){	return 0;} static void dummy_inode_free_security (struct inode *inode){	return;} static int dummy_inode_init_security (struct inode *inode, struct inode *dir,				      char **name, void **value, size_t *len){	return -EOPNOTSUPP;} static int dummy_inode_create (struct inode *inode, struct dentry *dentry,			       int mask){	return 0;} static int dummy_inode_link (struct dentry *old_dentry, struct inode *inode,			     struct dentry *new_dentry){	return 0;} static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry){	return 0;} static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,				const char *name){	return 0;} static int dummy_inode_mkdir (struct inode *inode, struct dentry *dentry,			      int mask){	return 0;} static int dummy_inode_rmdir (struct inode *inode, struct dentry *dentry){	return 0;} static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,			      int mode, dev_t dev){	return 0;} static int dummy_inode_rename (struct inode *old_inode,			       struct dentry *old_dentry,			       struct inode *new_inode,			       struct dentry *new_dentry){	return 0;} static int dummy_inode_readlink (struct dentry *dentry){	return 0;} static int dummy_inode_follow_link (struct dentry *dentry,				    struct nameidata *nameidata){	return 0;} static int dummy_inode_permission (struct inode *inode, int mask, struct nameidata *nd){	return 0;} static int dummy_inode_setattr (struct dentry *dentry, struct iattr *iattr){	return 0;} static int dummy_inode_getattr (struct vfsmount *mnt, struct dentry *dentry){	return 0;} static void dummy_inode_delete (struct inode *ino){	return;} static int dummy_inode_setxattr (struct dentry *dentry, char *name, void *value,				size_t size, int flags){	if (!strncmp(name, XATTR_SECURITY_PREFIX,		     sizeof(XATTR_SECURITY_PREFIX) - 1) &&	    !capable(CAP_SYS_ADMIN))		return -EPERM;	return 0;} static void dummy_inode_post_setxattr (struct dentry *dentry, char *name, void *value,				       size_t size, int flags){} static int dummy_inode_getxattr (struct dentry *dentry, char *name){	return 0;} static int dummy_inode_listxattr (struct dentry *dentry){	return 0;} static int dummy_inode_removexattr (struct dentry *dentry, char *name){	if (!strncmp(name, XATTR_SECURITY_PREFIX,		     sizeof(XATTR_SECURITY_PREFIX) - 1) &&	    !capable(CAP_SYS_ADMIN))		return -EPERM;	return 0;} static int dummy_inode_getsecurity(const struct inode *inode, const char *name, void *buffer, size_t size, int err){	return -EOPNOTSUPP;} static int dummy_inode_setsecurity(struct inode *inode, const char *name, const void *value, size_t size, int flags){	return -EOPNOTSUPP;} static int dummy_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size){	return 0;} static const char *dummy_inode_xattr_getsuffix(void){	return NULL;} static int dummy_file_permission (struct file *file, int mask){	return 0;} static int dummy_file_alloc_security (struct file *file){	return 0;} static void dummy_file_free_security (struct file *file){	return;} static int dummy_file_ioctl (struct file *file, unsigned int command,			     unsigned long arg){	return 0;} static int dummy_file_mmap (struct file *file, unsigned long reqprot,			    unsigned long prot,			    unsigned long flags){	return 0;} static int dummy_file_mprotect (struct vm_area_struct *vma,				unsigned long reqprot,				unsigned long prot){	return 0;} static int dummy_file_lock (struct file *file, unsigned int cmd){	return 0;} static int dummy_file_fcntl (struct file *file, unsigned int cmd,			     unsigned long arg){	return 0;} static int dummy_file_set_fowner (struct file *file){	return 0;} static int dummy_file_send_sigiotask (struct task_struct *tsk,				      struct fown_struct *fown, int sig){	return 0;} static int dummy_file_receive (struct file *file){	return 0;} static int dummy_task_create (unsigned long clone_flags){	return 0;} static int dummy_task_alloc_security (struct task_struct *p){	return 0;} static void dummy_task_free_security (struct task_struct *p){	return;} static int dummy_task_setuid (uid_t id0, uid_t id1, uid_t id2, int flags){	return 0;} static int dummy_task_post_setuid (uid_t id0, uid_t id1, uid_t id2, int flags){	dummy_capget(current, &current->cap_effective, &current->cap_inheritable, &current->cap_permitted);	return 0;} static int dummy_task_setgid (gid_t id0, gid_t id1, gid_t id2, int flags){	return 0;} static int dummy_task_setpgid (struct task_struct *p, pid_t pgid){	return 0;} static int dummy_task_getpgid (struct task_struct *p){

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