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Diffstat (limited to '')
| -rw-r--r-- | security/selinux/include/objsec.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h new file mode 100644 index 000000000..295313240 --- /dev/null +++ b/security/selinux/include/objsec.h @@ -0,0 +1,197 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * NSA Security-Enhanced Linux (SELinux) security module + * + * This file contains the SELinux security data structures for kernel objects. + * + * Author(s): Stephen Smalley, <sds@tycho.nsa.gov> + * Chris Vance, <cvance@nai.com> + * Wayne Salamon, <wsalamon@nai.com> + * James Morris <jmorris@redhat.com> + * + * Copyright (C) 2001,2002 Networks Associates Technology, Inc. + * Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com> + * Copyright (C) 2016 Mellanox Technologies + */ +#ifndef _SELINUX_OBJSEC_H_ +#define _SELINUX_OBJSEC_H_ + +#include <linux/list.h> +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/binfmts.h> +#include <linux/in.h> +#include <linux/spinlock.h> +#include <linux/lsm_hooks.h> +#include <linux/msg.h> +#include <net/net_namespace.h> +#include "flask.h" +#include "avc.h" + +struct task_security_struct { + u32 osid; /* SID prior to last execve */ + u32 sid; /* current SID */ + u32 exec_sid; /* exec SID */ + u32 create_sid; /* fscreate SID */ + u32 keycreate_sid; /* keycreate SID */ + u32 sockcreate_sid; /* fscreate SID */ +} __randomize_layout; + +enum label_initialized { + LABEL_INVALID, /* invalid or not initialized */ + LABEL_INITIALIZED, /* initialized */ + LABEL_PENDING +}; + +struct inode_security_struct { + struct inode *inode; /* back pointer to inode object */ + struct list_head list; /* list of inode_security_struct */ + u32 task_sid; /* SID of creating task */ + u32 sid; /* SID of this object */ + u16 sclass; /* security class of this object */ + unsigned char initialized; /* initialization flag */ + spinlock_t lock; +}; + +struct file_security_struct { + u32 sid; /* SID of open file description */ + u32 fown_sid; /* SID of file owner (for SIGIO) */ + u32 isid; /* SID of inode at the time of file open */ + u32 pseqno; /* Policy seqno at the time of file open */ +}; + +struct superblock_security_struct { + u32 sid; /* SID of file system superblock */ + u32 def_sid; /* default SID for labeling */ + u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */ + unsigned short behavior; /* labeling behavior */ + unsigned short flags; /* which mount options were specified */ + struct mutex lock; + struct list_head isec_head; + spinlock_t isec_lock; +}; + +struct msg_security_struct { + u32 sid; /* SID of message */ +}; + +struct ipc_security_struct { + u16 sclass; /* security class of this object */ + u32 sid; /* SID of IPC resource */ +}; + +struct netif_security_struct { + struct net *ns; /* network namespace */ + int ifindex; /* device index */ + u32 sid; /* SID for this interface */ +}; + +struct netnode_security_struct { + union { + __be32 ipv4; /* IPv4 node address */ + struct in6_addr ipv6; /* IPv6 node address */ + } addr; + u32 sid; /* SID for this node */ + u16 family; /* address family */ +}; + +struct netport_security_struct { + u32 sid; /* SID for this node */ + u16 port; /* port number */ + u8 protocol; /* transport protocol */ +}; + +struct sk_security_struct { +#ifdef CONFIG_NETLABEL + enum { /* NetLabel state */ + NLBL_UNSET = 0, + NLBL_REQUIRE, + NLBL_LABELED, + NLBL_REQSKB, + NLBL_CONNLABELED, + } nlbl_state; + struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */ +#endif + u32 sid; /* SID of this object */ + u32 peer_sid; /* SID of peer */ + u16 sclass; /* sock security class */ + enum { /* SCTP association state */ + SCTP_ASSOC_UNSET = 0, + SCTP_ASSOC_SET, + } sctp_assoc_state; +}; + +struct tun_security_struct { + u32 sid; /* SID for the tun device sockets */ +}; + +struct key_security_struct { + u32 sid; /* SID of key */ +}; + +struct ib_security_struct { + u32 sid; /* SID of the queue pair or MAD agent */ +}; + +struct pkey_security_struct { + u64 subnet_prefix; /* Port subnet prefix */ + u16 pkey; /* PKey number */ + u32 sid; /* SID of pkey */ +}; + +struct bpf_security_struct { + u32 sid; /* SID of bpf obj creator */ +}; + +struct perf_event_security_struct { + u32 sid; /* SID of perf_event obj creator */ +}; + +extern struct lsm_blob_sizes selinux_blob_sizes; +static inline struct task_security_struct *selinux_cred(const struct cred *cred) +{ + return cred->security + selinux_blob_sizes.lbs_cred; +} + +static inline struct file_security_struct *selinux_file(const struct file *file) +{ + return file->f_security + selinux_blob_sizes.lbs_file; +} + +static inline struct inode_security_struct *selinux_inode( + const struct inode *inode) +{ + if (unlikely(!inode->i_security)) + return NULL; + return inode->i_security + selinux_blob_sizes.lbs_inode; +} + +static inline struct msg_security_struct *selinux_msg_msg( + const struct msg_msg *msg_msg) +{ + return msg_msg->security + selinux_blob_sizes.lbs_msg_msg; +} + +static inline struct ipc_security_struct *selinux_ipc( + const struct kern_ipc_perm *ipc) +{ + return ipc->security + selinux_blob_sizes.lbs_ipc; +} + +/* + * get the subjective security ID of the current task + */ +static inline u32 current_sid(void) +{ + const struct task_security_struct *tsec = selinux_cred(current_cred()); + + return tsec->sid; +} + +static inline struct superblock_security_struct *selinux_superblock( + const struct super_block *superblock) +{ + return superblock->s_security + selinux_blob_sizes.lbs_superblock; +} + +#endif /* _SELINUX_OBJSEC_H_ */ |