1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Security-Enhanced Linux (SELinux) security module 4 * 5 * This file contains the SELinux security data structures for kernel objects. 6 * 7 * Author(s): Stephen Smalley, <stephen.smalley.work@gmail.com> 8 * Chris Vance, <cvance@nai.com> 9 * Wayne Salamon, <wsalamon@nai.com> 10 * James Morris <jmorris@redhat.com> 11 * 12 * Copyright (C) 2001,2002 Networks Associates Technology, Inc. 13 * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com> 14 * Copyright (C) 2016 Mellanox Technologies 15 */ 16 17 #ifndef _SELINUX_OBJSEC_H_ 18 #define _SELINUX_OBJSEC_H_ 19 20 #include <linux/list.h> 21 #include <linux/sched.h> 22 #include <linux/fs.h> 23 #include <linux/binfmts.h> 24 #include <linux/in.h> 25 #include <linux/spinlock.h> 26 #include <linux/lsm_hooks.h> 27 #include <linux/msg.h> 28 #include <net/net_namespace.h> 29 #include "flask.h" 30 #include "avc.h" 31 32 struct task_security_struct { 33 u32 osid; /* SID prior to last execve */ 34 u32 sid; /* current SID */ 35 u32 exec_sid; /* exec SID */ 36 u32 create_sid; /* fscreate SID */ 37 u32 keycreate_sid; /* keycreate SID */ 38 u32 sockcreate_sid; /* fscreate SID */ 39 } __randomize_layout; 40 41 enum label_initialized { 42 LABEL_INVALID, /* invalid or not initialized */ 43 LABEL_INITIALIZED, /* initialized */ 44 LABEL_PENDING 45 }; 46 47 struct inode_security_struct { 48 struct inode *inode; /* back pointer to inode object */ 49 struct list_head list; /* list of inode_security_struct */ 50 u32 task_sid; /* SID of creating task */ 51 u32 sid; /* SID of this object */ 52 u16 sclass; /* security class of this object */ 53 unsigned char initialized; /* initialization flag */ 54 spinlock_t lock; 55 }; 56 57 struct file_security_struct { 58 u32 sid; /* SID of open file description */ 59 u32 fown_sid; /* SID of file owner (for SIGIO) */ 60 u32 isid; /* SID of inode at the time of file open */ 61 u32 pseqno; /* Policy seqno at the time of file open */ 62 }; 63 64 struct superblock_security_struct { 65 u32 sid; /* SID of file system superblock */ 66 u32 def_sid; /* default SID for labeling */ 67 u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */ 68 unsigned short behavior; /* labeling behavior */ 69 unsigned short flags; /* which mount options were specified */ 70 struct mutex lock; 71 struct list_head isec_head; 72 spinlock_t isec_lock; 73 }; 74 75 struct msg_security_struct { 76 u32 sid; /* SID of message */ 77 }; 78 79 struct ipc_security_struct { 80 u16 sclass; /* security class of this object */ 81 u32 sid; /* SID of IPC resource */ 82 }; 83 84 struct netif_security_struct { 85 struct net *ns; /* network namespace */ 86 int ifindex; /* device index */ 87 u32 sid; /* SID for this interface */ 88 }; 89 90 struct netnode_security_struct { 91 union { 92 __be32 ipv4; /* IPv4 node address */ 93 struct in6_addr ipv6; /* IPv6 node address */ 94 } addr; 95 u32 sid; /* SID for this node */ 96 u16 family; /* address family */ 97 }; 98 99 struct netport_security_struct { 100 u32 sid; /* SID for this node */ 101 u16 port; /* port number */ 102 u8 protocol; /* transport protocol */ 103 }; 104 105 struct sk_security_struct { 106 #ifdef CONFIG_NETLABEL 107 enum { /* NetLabel state */ 108 NLBL_UNSET = 0, 109 NLBL_REQUIRE, 110 NLBL_LABELED, 111 NLBL_REQSKB, 112 NLBL_CONNLABELED, 113 } nlbl_state; 114 struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */ 115 #endif 116 u32 sid; /* SID of this object */ 117 u32 peer_sid; /* SID of peer */ 118 u16 sclass; /* sock security class */ 119 enum { /* SCTP association state */ 120 SCTP_ASSOC_UNSET = 0, 121 SCTP_ASSOC_SET, 122 } sctp_assoc_state; 123 }; 124 125 struct tun_security_struct { 126 u32 sid; /* SID for the tun device sockets */ 127 }; 128 129 struct key_security_struct { 130 u32 sid; /* SID of key */ 131 }; 132 133 struct ib_security_struct { 134 u32 sid; /* SID of the queue pair or MAD agent */ 135 }; 136 137 struct pkey_security_struct { 138 u64 subnet_prefix; /* Port subnet prefix */ 139 u16 pkey; /* PKey number */ 140 u32 sid; /* SID of pkey */ 141 }; 142 143 struct bpf_security_struct { 144 u32 sid; /* SID of bpf obj creator */ 145 }; 146 147 struct perf_event_security_struct { 148 u32 sid; /* SID of perf_event obj creator */ 149 }; 150 151 extern struct lsm_blob_sizes selinux_blob_sizes; 152 static inline struct task_security_struct *selinux_cred(const struct cred *cred) 153 { 154 return cred->security + selinux_blob_sizes.lbs_cred; 155 } 156 157 static inline struct file_security_struct *selinux_file(const struct file *file) 158 { 159 return file->f_security + selinux_blob_sizes.lbs_file; 160 } 161 162 static inline struct inode_security_struct * 163 selinux_inode(const struct inode *inode) 164 { 165 if (unlikely(!inode->i_security)) 166 return NULL; 167 return inode->i_security + selinux_blob_sizes.lbs_inode; 168 } 169 170 static inline struct msg_security_struct * 171 selinux_msg_msg(const struct msg_msg *msg_msg) 172 { 173 return msg_msg->security + selinux_blob_sizes.lbs_msg_msg; 174 } 175 176 static inline struct ipc_security_struct * 177 selinux_ipc(const struct kern_ipc_perm *ipc) 178 { 179 return ipc->security + selinux_blob_sizes.lbs_ipc; 180 } 181 182 /* 183 * get the subjective security ID of the current task 184 */ 185 static inline u32 current_sid(void) 186 { 187 const struct task_security_struct *tsec = selinux_cred(current_cred()); 188 189 return tsec->sid; 190 } 191 192 static inline struct superblock_security_struct * 193 selinux_superblock(const struct super_block *superblock) 194 { 195 return superblock->s_security + selinux_blob_sizes.lbs_superblock; 196 } 197 198 #ifdef CONFIG_KEYS 199 static inline struct key_security_struct *selinux_key(const struct key *key) 200 { 201 return key->security + selinux_blob_sizes.lbs_key; 202 } 203 #endif /* CONFIG_KEYS */ 204 205 static inline struct sk_security_struct *selinux_sock(const struct sock *sock) 206 { 207 return sock->sk_security + selinux_blob_sizes.lbs_sock; 208 } 209 210 static inline struct tun_security_struct *selinux_tun_dev(void *security) 211 { 212 return security + selinux_blob_sizes.lbs_tun_dev; 213 } 214 215 static inline struct ib_security_struct *selinux_ib(void *ib_sec) 216 { 217 return ib_sec + selinux_blob_sizes.lbs_ib; 218 } 219 220 static inline struct perf_event_security_struct * 221 selinux_perf_event(void *perf_event) 222 { 223 return perf_event + selinux_blob_sizes.lbs_perf_event; 224 } 225 226 #endif /* _SELINUX_OBJSEC_H_ */ 227