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	Version: linux-6.0.1 spark-3.0.0 hadoop-3.2.0-src hadoop-3.3.0-src spark-2.4.7 linux-4.15.13 hadoop-2.7.4-src Revert   Change

 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com>
  *
  * Author:
  *      Casey Schaufler <casey@schaufler-ca.com>
  */
 
 #ifndef _SECURITY_SMACK_H
 #define _SECURITY_SMACK_H
 
 #include <linux/capability.h>
 #include <linux/spinlock.h>
 #include <linux/lsm_hooks.h>
 #include <linux/in.h>
 #if IS_ENABLED(CONFIG_IPV6)
 #include <linux/in6.h>
 #endif /* CONFIG_IPV6 */
 #include <net/netlabel.h>
 #include <linux/list.h>
 #include <linux/rculist.h>
 #include <linux/lsm_audit.h>
 #include <linux/msg.h>
 
 /*
  * Use IPv6 port labeling if IPv6 is enabled and secmarks
  * are not being used.
  */
 #if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
 #define SMACK_IPV6_PORT_LABELING 1
 #endif
 
 #if IS_ENABLED(CONFIG_IPV6) && defined(CONFIG_SECURITY_SMACK_NETFILTER)
 #define SMACK_IPV6_SECMARK_LABELING 1
 #endif
 
 /*
  * Smack labels were limited to 23 characters for a long time.
  */
 #define SMK_LABELLEN    24
 #define SMK_LONGLABEL   256
 
 /*
  * This is the repository for labels seen so that it is
  * not necessary to keep allocating tiny chuncks of memory
  * and so that they can be shared.
  *
  * Labels are never modified in place. Anytime a label
  * is imported (e.g. xattrset on a file) the list is checked
  * for it and it is added if it doesn't exist. The address
  * is passed out in either case. Entries are added, but
  * never deleted.
  *
  * Since labels are hanging around anyway it doesn't
  * hurt to maintain a secid for those awkward situations
  * where kernel components that ought to use LSM independent
  * interfaces don't. The secid should go away when all of
  * these components have been repaired.
  *
  * The cipso value associated with the label gets stored here, too.
  *
  * Keep the access rules for this subject label here so that
  * the entire set of rules does not need to be examined every
  * time.
  */
 struct smack_known {
     struct list_head        list;
     struct hlist_node       smk_hashed;
     char                *smk_known;
     u32             smk_secid;
     struct netlbl_lsm_secattr   smk_netlabel;   /* on wire labels */
     struct list_head        smk_rules;  /* access rules */
     struct mutex            smk_rules_lock; /* lock for rules */
 };
 
 /*
  * Maximum number of bytes for the levels in a CIPSO IP option.
  * Why 23? CIPSO is constrained to 30, so a 32 byte buffer is
  * bigger than can be used, and 24 is the next lower multiple
  * of 8, and there are too many issues if there isn't space set
  * aside for the terminating null byte.
  */
 #define SMK_CIPSOLEN    24
 
 struct superblock_smack {
     struct smack_known  *smk_root;
     struct smack_known  *smk_floor;
     struct smack_known  *smk_hat;
     struct smack_known  *smk_default;
     int         smk_flags;
 };
 
 /*
  * Superblock flags
  */
 #define SMK_SB_INITIALIZED  0x01
 #define SMK_SB_UNTRUSTED    0x02
 
 struct socket_smack {
     struct smack_known  *smk_out;   /* outbound label */
     struct smack_known  *smk_in;    /* inbound label */
     struct smack_known  *smk_packet;    /* TCP peer label */
     int         smk_state;  /* netlabel socket states */
 };
 #define SMK_NETLBL_UNSET    0
 #define SMK_NETLBL_UNLABELED    1
 #define SMK_NETLBL_LABELED  2
 #define SMK_NETLBL_REQSKB   3
 
 /*
  * Inode smack data
  */
 struct inode_smack {
     struct smack_known  *smk_inode; /* label of the fso */
     struct smack_known  *smk_task;  /* label of the task */
     struct smack_known  *smk_mmap;  /* label of the mmap domain */
     int         smk_flags;  /* smack inode flags */
 };
 
 struct task_smack {
     struct smack_known  *smk_task;  /* label for access control */
     struct smack_known  *smk_forked;    /* label when forked */
     struct list_head    smk_rules;  /* per task access rules */
     struct mutex        smk_rules_lock; /* lock for the rules */
     struct list_head    smk_relabel;    /* transit allowed labels */
 };
 
 #define SMK_INODE_INSTANT   0x01    /* inode is instantiated */
 #define SMK_INODE_TRANSMUTE 0x02    /* directory is transmuting */
 #define SMK_INODE_CHANGED   0x04    /* smack was transmuted */
 #define SMK_INODE_IMPURE    0x08    /* involved in an impure transaction */
 
 /*
  * A label access rule.
  */
 struct smack_rule {
     struct list_head    list;
     struct smack_known  *smk_subject;
     struct smack_known  *smk_object;
     int         smk_access;
 };
 
 /*
  * An entry in the table identifying IPv4 hosts.
  */
 struct smk_net4addr {
     struct list_head    list;
     struct in_addr      smk_host;   /* network address */
     struct in_addr      smk_mask;   /* network mask */
     int         smk_masks;  /* mask size */
     struct smack_known  *smk_label; /* label */
 };
 
 /*
  * An entry in the table identifying IPv6 hosts.
  */
 struct smk_net6addr {
     struct list_head    list;
     struct in6_addr     smk_host;   /* network address */
     struct in6_addr     smk_mask;   /* network mask */
     int         smk_masks;  /* mask size */
     struct smack_known  *smk_label; /* label */
 };
 
 /*
  * An entry in the table identifying ports.
  */
 struct smk_port_label {
     struct list_head    list;
     struct sock     *smk_sock;  /* socket initialized on */
     unsigned short      smk_port;   /* the port number */
     struct smack_known  *smk_in;    /* inbound label */
     struct smack_known  *smk_out;   /* outgoing label */
     short           smk_sock_type;  /* Socket type */
     short           smk_can_reuse;
 };
 
 struct smack_known_list_elem {
     struct list_head    list;
     struct smack_known  *smk_label;
 };
 
 /* Super block security struct flags for mount options */
 #define FSDEFAULT_MNT   0x01
 #define FSFLOOR_MNT 0x02
 #define FSHAT_MNT   0x04
 #define FSROOT_MNT  0x08
 #define FSTRANS_MNT 0x10
 
 #define NUM_SMK_MNT_OPTS    5
 
 enum {
     Opt_error = -1,
     Opt_fsdefault = 0,
     Opt_fsfloor = 1,
     Opt_fshat = 2,
     Opt_fsroot = 3,
     Opt_fstransmute = 4,
 };
 
 #define SMACK_DELETE_OPTION "-DELETE"
 #define SMACK_CIPSO_OPTION  "-CIPSO"
 
 /*
  * CIPSO defaults.
  */
 #define SMACK_CIPSO_DOI_DEFAULT     3   /* Historical */
 #define SMACK_CIPSO_DOI_INVALID     -1  /* Not a DOI */
 #define SMACK_CIPSO_DIRECT_DEFAULT  250 /* Arbitrary */
 #define SMACK_CIPSO_MAPPED_DEFAULT  251 /* Also arbitrary */
 #define SMACK_CIPSO_MAXLEVEL            255     /* CIPSO 2.2 standard */
 /*
  * CIPSO 2.2 standard is 239, but Smack wants to use the
  * categories in a structured way that limits the value to
  * the bits in 23 bytes, hence the unusual number.
  */
 #define SMACK_CIPSO_MAXCATNUM           184     /* 23 * 8 */
 
 /*
  * Ptrace rules
  */
 #define SMACK_PTRACE_DEFAULT    0
 #define SMACK_PTRACE_EXACT  1
 #define SMACK_PTRACE_DRACONIAN  2
 #define SMACK_PTRACE_MAX    SMACK_PTRACE_DRACONIAN
 
 /*
  * Flags for untraditional access modes.
  * It shouldn't be necessary to avoid conflicts with definitions
  * in fs.h, but do so anyway.
  */
 #define MAY_TRANSMUTE   0x00001000  /* Controls directory labeling */
 #define MAY_LOCK    0x00002000  /* Locks should be writes, but ... */
 #define MAY_BRINGUP 0x00004000  /* Report use of this rule */
 
 /*
  * The policy for delivering signals is configurable.
  * It is usually "write", but can be "append".
  */
 #ifdef CONFIG_SECURITY_SMACK_APPEND_SIGNALS
 #define MAY_DELIVER MAY_APPEND  /* Signal delivery requires append */
 #else
 #define MAY_DELIVER MAY_WRITE   /* Signal delivery requires write */
 #endif
 
 #define SMACK_BRINGUP_ALLOW     1   /* Allow bringup mode */
 #define SMACK_UNCONFINED_SUBJECT    2   /* Allow unconfined label */
 #define SMACK_UNCONFINED_OBJECT     3   /* Allow unconfined label */
 
 /*
  * Just to make the common cases easier to deal with
  */
 #define MAY_ANYREAD (MAY_READ | MAY_EXEC)
 #define MAY_READWRITE   (MAY_READ | MAY_WRITE)
 #define MAY_NOT     0
 
 /*
  * Number of access types used by Smack (rwxatlb)
  */
 #define SMK_NUM_ACCESS_TYPE 7
 
 /* SMACK data */
 struct smack_audit_data {
     const char *function;
     char *subject;
     char *object;
     char *request;
     int result;
 };
 
 /*
  * Smack audit data; is empty if CONFIG_AUDIT not set
  * to save some stack
  */
 struct smk_audit_info {
 #ifdef CONFIG_AUDIT
     struct common_audit_data a;
     struct smack_audit_data sad;
 #endif
 };
 
 /*
  * These functions are in smack_access.c
  */
 int smk_access_entry(char *, char *, struct list_head *);
 int smk_access(struct smack_known *, struct smack_known *,
            int, struct smk_audit_info *);
 int smk_tskacc(struct task_smack *, struct smack_known *,
            u32, struct smk_audit_info *);
 int smk_curacc(struct smack_known *, u32, struct smk_audit_info *);
 struct smack_known *smack_from_secid(const u32);
 char *smk_parse_smack(const char *string, int len);
 int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
 struct smack_known *smk_import_entry(const char *, int);
 void smk_insert_entry(struct smack_known *skp);
 struct smack_known *smk_find_entry(const char *);
 bool smack_privileged(int cap);
 bool smack_privileged_cred(int cap, const struct cred *cred);
 void smk_destroy_label_list(struct list_head *list);
 int smack_populate_secattr(struct smack_known *skp);
 
 /*
  * Shared data.
  */
 extern int smack_enabled __initdata;
 extern int smack_cipso_direct;
 extern int smack_cipso_mapped;
 extern struct smack_known *smack_net_ambient;
 extern struct smack_known *smack_syslog_label;
 #ifdef CONFIG_SECURITY_SMACK_BRINGUP
 extern struct smack_known *smack_unconfined;
 #endif
 extern int smack_ptrace_rule;
 extern struct lsm_blob_sizes smack_blob_sizes;
 
 extern struct smack_known smack_known_floor;
 extern struct smack_known smack_known_hat;
 extern struct smack_known smack_known_huh;
 extern struct smack_known smack_known_star;
 extern struct smack_known smack_known_web;
 
 extern struct mutex smack_known_lock;
 extern struct list_head smack_known_list;
 extern struct list_head smk_net4addr_list;
 extern struct list_head smk_net6addr_list;
 
 extern struct mutex     smack_onlycap_lock;
 extern struct list_head smack_onlycap_list;
 
 #define SMACK_HASH_SLOTS 16
 extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
 extern struct kmem_cache *smack_rule_cache;
 
 static inline struct task_smack *smack_cred(const struct cred *cred)
 {
     return cred->security + smack_blob_sizes.lbs_cred;
 }
 
 static inline struct smack_known **smack_file(const struct file *file)
 {
     return (struct smack_known **)(file->f_security +
                        smack_blob_sizes.lbs_file);
 }
 
 static inline struct inode_smack *smack_inode(const struct inode *inode)
 {
     return inode->i_security + smack_blob_sizes.lbs_inode;
 }
 
 static inline struct smack_known **smack_msg_msg(const struct msg_msg *msg)
 {
     return msg->security + smack_blob_sizes.lbs_msg_msg;
 }
 
 static inline struct smack_known **smack_ipc(const struct kern_ipc_perm *ipc)
 {
     return ipc->security + smack_blob_sizes.lbs_ipc;
 }
 
 static inline struct superblock_smack *smack_superblock(
                     const struct super_block *superblock)
 {
     return superblock->s_security + smack_blob_sizes.lbs_superblock;
 }
 
 /*
  * Is the directory transmuting?
  */
 static inline int smk_inode_transmutable(const struct inode *isp)
 {
     struct inode_smack *sip = smack_inode(isp);
     return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
 }
 
 /*
  * Present a pointer to the smack label entry in an inode blob.
  */
 static inline struct smack_known *smk_of_inode(const struct inode *isp)
 {
     struct inode_smack *sip = smack_inode(isp);
     return sip->smk_inode;
 }
 
 /*
  * Present a pointer to the smack label entry in an task blob.
  */
 static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
 {
     return tsp->smk_task;
 }
 
 static inline struct smack_known *smk_of_task_struct_obj(
                         const struct task_struct *t)
 {
     struct smack_known *skp;
     const struct cred *cred;
 
     rcu_read_lock();
 
     cred = __task_cred(t);
     skp = smk_of_task(smack_cred(cred));
 
     rcu_read_unlock();
 
     return skp;
 }
 
 /*
  * Present a pointer to the forked smack label entry in an task blob.
  */
 static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
 {
     return tsp->smk_forked;
 }
 
 /*
  * Present a pointer to the smack label in the current task blob.
  */
 static inline struct smack_known *smk_of_current(void)
 {
     return smk_of_task(smack_cred(current_cred()));
 }
 
 /*
  * logging functions
  */
 #define SMACK_AUDIT_DENIED 0x1
 #define SMACK_AUDIT_ACCEPT 0x2
 extern int log_policy;
 
 void smack_log(char *subject_label, char *object_label,
         int request,
         int result, struct smk_audit_info *auditdata);
 
 #ifdef CONFIG_AUDIT
 
 /*
  * some inline functions to set up audit data
  * they do nothing if CONFIG_AUDIT is not set
  *
  */
 static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
                    char type)
 {
     memset(&a->sad, 0, sizeof(a->sad));
     a->a.type = type;
     a->a.smack_audit_data = &a->sad;
     a->a.smack_audit_data->function = func;
 }
 
 static inline void smk_ad_init_net(struct smk_audit_info *a, const char *func,
                    char type, struct lsm_network_audit *net)
 {
     smk_ad_init(a, func, type);
     memset(net, 0, sizeof(*net));
     a->a.u.net = net;
 }
 
 static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
                      struct task_struct *t)
 {
     a->a.u.tsk = t;
 }
 static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
                             struct dentry *d)
 {
     a->a.u.dentry = d;
 }
 static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
                           struct inode *i)
 {
     a->a.u.inode = i;
 }
 static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
                          struct path p)
 {
     a->a.u.path = p;
 }
 static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
                         struct sock *sk)
 {
     a->a.u.net->sk = sk;
 }
 
 #else /* no AUDIT */
 
 static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
                    char type)
 {
 }
 static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
                      struct task_struct *t)
 {
 }
 static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
                             struct dentry *d)
 {
 }
 static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
                           struct inode *i)
 {
 }
 static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
                          struct path p)
 {
 }
 static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
                         struct sock *sk)
 {
 }
 #endif
 
 #endif  /* _SECURITY_SMACK_H */

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