diff options
Diffstat (limited to 'security/apparmor/include')
| -rw-r--r-- | security/apparmor/include/apparmor.h | 34 | ||||
| -rw-r--r-- | security/apparmor/include/apparmorfs.h | 84 | ||||
| -rw-r--r-- | security/apparmor/include/audit.h | 38 | ||||
| -rw-r--r-- | security/apparmor/include/capability.h | 9 | ||||
| -rw-r--r-- | security/apparmor/include/context.h | 76 | ||||
| -rw-r--r-- | security/apparmor/include/crypto.h | 36 | ||||
| -rw-r--r-- | security/apparmor/include/file.h | 20 | ||||
| -rw-r--r-- | security/apparmor/include/ipc.h | 4 | ||||
| -rw-r--r-- | security/apparmor/include/match.h | 24 | ||||
| -rw-r--r-- | security/apparmor/include/path.h | 3 | ||||
| -rw-r--r-- | security/apparmor/include/policy.h | 249 | ||||
| -rw-r--r-- | security/apparmor/include/policy_unpack.h | 21 | ||||
| -rw-r--r-- | security/apparmor/include/procattr.h | 1 | ||||
| -rw-r--r-- | security/apparmor/include/resource.h | 4 | ||||
| -rw-r--r-- | security/apparmor/include/sid.h | 4 |
15 files changed, 471 insertions, 136 deletions
diff --git a/security/apparmor/include/apparmor.h b/security/apparmor/include/apparmor.h index df364956081..97130f88838 100644 --- a/security/apparmor/include/apparmor.h +++ b/security/apparmor/include/apparmor.h @@ -15,10 +15,24 @@ #ifndef __APPARMOR_H #define __APPARMOR_H +#include <linux/slab.h> #include <linux/fs.h> #include "match.h" +/* + * Class of mediation types in the AppArmor policy db + */ +#define AA_CLASS_ENTRY 0 +#define AA_CLASS_UNKNOWN 1 +#define AA_CLASS_FILE 2 +#define AA_CLASS_CAP 3 +#define AA_CLASS_NET 4 +#define AA_CLASS_RLIMITS 5 +#define AA_CLASS_DOMAIN 6 + +#define AA_CLASS_LAST AA_CLASS_DOMAIN + /* Control parameters settable through module/boot flags */ extern enum audit_mode aa_g_audit; extern bool aa_g_audit_header; @@ -51,9 +65,23 @@ extern int apparmor_initialized __initdata; /* fn's in lib */ char *aa_split_fqname(char *args, char **ns_name); void aa_info_message(const char *str); -void *kvmalloc(size_t size); -void kvfree(void *buffer); +void *__aa_kvmalloc(size_t size, gfp_t flags); + +static inline void *kvmalloc(size_t size) +{ + return __aa_kvmalloc(size, 0); +} + +static inline void *kvzalloc(size_t size) +{ + return __aa_kvmalloc(size, __GFP_ZERO); +} +/* returns 0 if kref not incremented */ +static inline int kref_get_not0(struct kref *kref) +{ + return atomic_inc_not_zero(&kref->refcount); +} /** * aa_strneq - compare null terminated @str to a non null terminated substring @@ -81,7 +109,7 @@ static inline unsigned int aa_dfa_null_transition(struct aa_dfa *dfa, unsigned int start) { /* the null transition only needs the string's null terminator byte */ - return aa_dfa_match_len(dfa, start, "", 1); + return aa_dfa_next(dfa, start, 0); } static inline bool mediated_filesystem(struct inode *inode) diff --git a/security/apparmor/include/apparmorfs.h b/security/apparmor/include/apparmorfs.h index cb1e93a114d..414e56878dd 100644 --- a/security/apparmor/include/apparmorfs.h +++ b/security/apparmor/include/apparmorfs.h @@ -15,6 +15,90 @@ #ifndef __AA_APPARMORFS_H #define __AA_APPARMORFS_H +enum aa_fs_type { + AA_FS_TYPE_BOOLEAN, + AA_FS_TYPE_STRING, + AA_FS_TYPE_U64, + AA_FS_TYPE_FOPS, + AA_FS_TYPE_DIR, +}; + +struct aa_fs_entry; + +struct aa_fs_entry { + const char *name; + struct dentry *dentry; + umode_t mode; + enum aa_fs_type v_type; + union { + bool boolean; + char *string; + unsigned long u64; + struct aa_fs_entry *files; + } v; + const struct file_operations *file_ops; +}; + +extern const struct file_operations aa_fs_seq_file_ops; + +#define AA_FS_FILE_BOOLEAN(_name, _value) \ + { .name = (_name), .mode = 0444, \ + .v_type = AA_FS_TYPE_BOOLEAN, .v.boolean = (_value), \ + .file_ops = &aa_fs_seq_file_ops } +#define AA_FS_FILE_STRING(_name, _value) \ + { .name = (_name), .mode = 0444, \ + .v_type = AA_FS_TYPE_STRING, .v.string = (_value), \ + .file_ops = &aa_fs_seq_file_ops } +#define AA_FS_FILE_U64(_name, _value) \ + { .name = (_name), .mode = 0444, \ + .v_type = AA_FS_TYPE_U64, .v.u64 = (_value), \ + .file_ops = &aa_fs_seq_file_ops } +#define AA_FS_FILE_FOPS(_name, _mode, _fops) \ + { .name = (_name), .v_type = AA_FS_TYPE_FOPS, \ + .mode = (_mode), .file_ops = (_fops) } +#define AA_FS_DIR(_name, _value) \ + { .name = (_name), .v_type = AA_FS_TYPE_DIR, .v.files = (_value) } + extern void __init aa_destroy_aafs(void); +struct aa_profile; +struct aa_namespace; + +enum aafs_ns_type { + AAFS_NS_DIR, + AAFS_NS_PROFS, + AAFS_NS_NS, + AAFS_NS_COUNT, + AAFS_NS_MAX_COUNT, + AAFS_NS_SIZE, + AAFS_NS_MAX_SIZE, + AAFS_NS_OWNER, + AAFS_NS_SIZEOF, +}; + +enum aafs_prof_type { + AAFS_PROF_DIR, + AAFS_PROF_PROFS, + AAFS_PROF_NAME, + AAFS_PROF_MODE, + AAFS_PROF_ATTACH, + AAFS_PROF_HASH, + AAFS_PROF_SIZEOF, +}; + +#define ns_dir(X) ((X)->dents[AAFS_NS_DIR]) +#define ns_subns_dir(X) ((X)->dents[AAFS_NS_NS]) +#define ns_subprofs_dir(X) ((X)->dents[AAFS_NS_PROFS]) + +#define prof_dir(X) ((X)->dents[AAFS_PROF_DIR]) +#define prof_child_dir(X) ((X)->dents[AAFS_PROF_PROFS]) + +void __aa_fs_profile_rmdir(struct aa_profile *profile); +void __aa_fs_profile_migrate_dents(struct aa_profile *old, + struct aa_profile *new); +int __aa_fs_profile_mkdir(struct aa_profile *profile, struct dentry *parent); +void __aa_fs_namespace_rmdir(struct aa_namespace *ns); +int __aa_fs_namespace_mkdir(struct aa_namespace *ns, struct dentry *parent, + const char *name); + #endif /* __AA_APPARMORFS_H */ diff --git a/security/apparmor/include/audit.h b/security/apparmor/include/audit.h index 1951786d32e..ba3dfd17f23 100644 --- a/security/apparmor/include/audit.h +++ b/security/apparmor/include/audit.h @@ -25,11 +25,8 @@ struct aa_profile; -extern const char *audit_mode_names[]; +extern const char *const audit_mode_names[]; #define AUDIT_MAX_INDEX 5 - -#define AUDIT_APPARMOR_AUTO 0 /* auto choose audit message type */ - enum audit_mode { AUDIT_NORMAL, /* follow normal auditing of accesses */ AUDIT_QUIET_DENIED, /* quiet all denied access messages */ @@ -45,10 +42,11 @@ enum audit_type { AUDIT_APPARMOR_HINT, AUDIT_APPARMOR_STATUS, AUDIT_APPARMOR_ERROR, - AUDIT_APPARMOR_KILL + AUDIT_APPARMOR_KILL, + AUDIT_APPARMOR_AUTO }; -extern const char *op_table[]; +extern const char *const op_table[]; enum aa_ops { OP_NULL, @@ -104,7 +102,33 @@ enum aa_ops { }; -/* define a short hand for apparmor_audit_data portion of common_audit_data */ +struct apparmor_audit_data { + int error; + int op; + int type; + void *profile; + const char *name; + const char *info; + union { + void *target; + struct { + long pos; + void *target; + } iface; + struct { + int rlim; + unsigned long max; + } rlim; + struct { + const char *target; + u32 request; + u32 denied; + kuid_t ouid; + } fs; + }; +}; + +/* define a short hand for apparmor_audit_data structure */ #define aad apparmor_audit_data void aa_audit_msg(int type, struct common_audit_data *sa, diff --git a/security/apparmor/include/capability.h b/security/apparmor/include/capability.h index c24d2959ea0..fc3fa381d85 100644 --- a/security/apparmor/include/capability.h +++ b/security/apparmor/include/capability.h @@ -4,7 +4,7 @@ * This file contains AppArmor capability mediation definitions. * * Copyright (C) 1998-2008 Novell/SUSE - * Copyright 2009-2010 Canonical Ltd. + * Copyright 2009-2013 Canonical Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as @@ -17,6 +17,8 @@ #include <linux/sched.h> +#include "apparmorfs.h" + struct aa_profile; /* aa_caps - confinement data for capabilities @@ -34,8 +36,9 @@ struct aa_caps { kernel_cap_t extended; }; -int aa_capable(struct task_struct *task, struct aa_profile *profile, int cap, - int audit); +extern struct aa_fs_entry aa_fs_entry_caps[]; + +int aa_capable(struct aa_profile *profile, int cap, int audit); static inline void aa_free_cap_rules(struct aa_caps *caps) { diff --git a/security/apparmor/include/context.h b/security/apparmor/include/context.h index a9cbee4d9e4..6bf65798e5d 100644 --- a/security/apparmor/include/context.h +++ b/security/apparmor/include/context.h @@ -21,6 +21,9 @@ #include "policy.h" +#define cred_cxt(X) (X)->security +#define current_cxt() cred_cxt(current_cred()) + /* struct aa_file_cxt - the AppArmor context the file was opened in * @perms: the permission the file was opened with * @@ -80,23 +83,8 @@ int aa_replace_current_profile(struct aa_profile *profile); int aa_set_current_onexec(struct aa_profile *profile); int aa_set_current_hat(struct aa_profile *profile, u64 token); int aa_restore_previous_profile(u64 cookie); +struct aa_profile *aa_get_task_profile(struct task_struct *task); -/** - * __aa_task_is_confined - determine if @task has any confinement - * @task: task to check confinement of (NOT NULL) - * - * If @task != current needs to be called in RCU safe critical section - */ -static inline bool __aa_task_is_confined(struct task_struct *task) -{ - struct aa_task_cxt *cxt = __task_cred(task)->security; - - BUG_ON(!cxt || !cxt->profile); - if (unconfined(aa_newest_version(cxt->profile))) - return 0; - - return 1; -} /** * aa_cred_profile - obtain cred's profiles @@ -108,9 +96,33 @@ static inline bool __aa_task_is_confined(struct task_struct *task) */ static inline struct aa_profile *aa_cred_profile(const struct cred *cred) { - struct aa_task_cxt *cxt = cred->security; + struct aa_task_cxt *cxt = cred_cxt(cred); BUG_ON(!cxt || !cxt->profile); - return aa_newest_version(cxt->profile); + return cxt->profile; +} + +/** + * __aa_task_profile - retrieve another task's profile + * @task: task to query (NOT NULL) + * + * Returns: @task's profile without incrementing its ref count + * + * If @task != current needs to be called in RCU safe critical section + */ +static inline struct aa_profile *__aa_task_profile(struct task_struct *task) +{ + return aa_cred_profile(__task_cred(task)); +} + +/** + * __aa_task_is_confined - determine if @task has any confinement + * @task: task to check confinement of (NOT NULL) + * + * If @task != current needs to be called in RCU safe critical section + */ +static inline bool __aa_task_is_confined(struct task_struct *task) +{ + return !unconfined(__aa_task_profile(task)); } /** @@ -136,19 +148,31 @@ static inline struct aa_profile *__aa_current_profile(void) */ static inline struct aa_profile *aa_current_profile(void) { - const struct aa_task_cxt *cxt = current_cred()->security; + const struct aa_task_cxt *cxt = current_cxt(); struct aa_profile *profile; BUG_ON(!cxt || !cxt->profile); - profile = aa_newest_version(cxt->profile); - /* - * Whether or not replacement succeeds, use newest profile so - * there is no need to update it after replacement. - */ - if (unlikely((cxt->profile != profile))) + if (PROFILE_INVALID(cxt->profile)) { + profile = aa_get_newest_profile(cxt->profile); aa_replace_current_profile(profile); + aa_put_profile(profile); + cxt = current_cxt(); + } - return profile; + return cxt->profile; +} + +/** + * aa_clear_task_cxt_trans - clear transition tracking info from the cxt + * @cxt: task context to clear (NOT NULL) + */ +static inline void aa_clear_task_cxt_trans(struct aa_task_cxt *cxt) +{ + aa_put_profile(cxt->previous); + aa_put_profile(cxt->onexec); + cxt->previous = NULL; + cxt->onexec = NULL; + cxt->token = 0; } #endif /* __AA_CONTEXT_H */ diff --git a/security/apparmor/include/crypto.h b/security/apparmor/include/crypto.h new file mode 100644 index 00000000000..dc418e5024d --- /dev/null +++ b/security/apparmor/include/crypto.h @@ -0,0 +1,36 @@ +/* + * AppArmor security module + * + * This file contains AppArmor policy loading interface function definitions. + * + * Copyright 2013 Canonical Ltd. + * + * 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, version 2 of the + * License. + */ + +#ifndef __APPARMOR_CRYPTO_H +#define __APPARMOR_CRYPTO_H + +#include "policy.h" + +#ifdef CONFIG_SECURITY_APPARMOR_HASH +unsigned int aa_hash_size(void); +int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start, + size_t len); +#else +static inline int aa_calc_profile_hash(struct aa_profile *profile, u32 version, + void *start, size_t len) +{ + return 0; +} + +static inline unsigned int aa_hash_size(void) +{ + return 0; +} +#endif + +#endif /* __APPARMOR_CRYPTO_H */ diff --git a/security/apparmor/include/file.h b/security/apparmor/include/file.h index ab8c6d87f75..2c922b86bd4 100644 --- a/security/apparmor/include/file.h +++ b/security/apparmor/include/file.h @@ -71,7 +71,7 @@ struct path; /* need to make conditional which ones are being set */ struct path_cond { - uid_t uid; + kuid_t uid; umode_t mode; }; @@ -117,7 +117,7 @@ static inline u16 dfa_map_xindex(u16 mask) index |= AA_X_NAME; } else if (old_index == 3) { index |= AA_X_NAME | AA_X_CHILD; - } else { + } else if (old_index) { index |= AA_X_TABLE; index |= old_index - 4; } @@ -146,7 +146,7 @@ static inline u16 dfa_map_xindex(u16 mask) int aa_audit_file(struct aa_profile *profile, struct file_perms *perms, gfp_t gfp, int op, u32 request, const char *name, - const char *target, uid_t ouid, const char *info, int error); + const char *target, kuid_t ouid, const char *info, int error); /** * struct aa_file_rules - components used for file rule permissions @@ -186,11 +186,6 @@ static inline void aa_free_file_rules(struct aa_file_rules *rules) aa_free_domain_entries(&rules->trans); } -#define ACC_FMODE(x) (("\000\004\002\006"[(x)&O_ACCMODE]) | (((x) << 1) & 0x40)) - -/* from namei.c */ -#define MAP_OPEN_FLAGS(x) ((((x) + 1) & O_ACCMODE) ? (x) + 1 : (x)) - /** * aa_map_file_perms - map file flags to AppArmor permissions * @file: open file to map flags to AppArmor permissions @@ -199,8 +194,13 @@ static inline void aa_free_file_rules(struct aa_file_rules *rules) */ static inline u32 aa_map_file_to_perms(struct file *file) { - int flags = MAP_OPEN_FLAGS(file->f_flags); - u32 perms = ACC_FMODE(file->f_mode); + int flags = file->f_flags; + u32 perms = 0; + + if (file->f_mode & FMODE_WRITE) + perms |= MAY_WRITE; + if (file->f_mode & FMODE_READ) + perms |= MAY_READ; if ((flags & O_APPEND) && (perms & MAY_WRITE)) perms = (perms & ~MAY_WRITE) | MAY_APPEND; diff --git a/security/apparmor/include/ipc.h b/security/apparmor/include/ipc.h index aeda0fbc8b2..288ca76e2fb 100644 --- a/security/apparmor/include/ipc.h +++ b/security/apparmor/include/ipc.h @@ -19,8 +19,8 @@ struct aa_profile; -int aa_may_ptrace(struct task_struct *tracer_task, struct aa_profile *tracer, - struct aa_profile *tracee, unsigned int mode); +int aa_may_ptrace(struct aa_profile *tracer, struct aa_profile *tracee, + unsigned int mode); int aa_ptrace(struct task_struct *tracer, struct task_struct *tracee, unsigned int mode); diff --git a/security/apparmor/include/match.h b/security/apparmor/include/match.h index a4a863997bd..001c43aa040 100644 --- a/security/apparmor/include/match.h +++ b/security/apparmor/include/match.h @@ -4,7 +4,7 @@ * This file contains AppArmor policy dfa matching engine definitions. * * Copyright (C) 1998-2008 Novell/SUSE - * Copyright 2009-2010 Canonical Ltd. + * Copyright 2009-2012 Canonical Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as @@ -16,25 +16,30 @@ #define __AA_MATCH_H #include <linux/kref.h> -#include <linux/workqueue.h> #define DFA_NOMATCH 0 #define DFA_START 1 -#define DFA_VALID_PERM_MASK 0xffffffff -#define DFA_VALID_PERM2_MASK 0xffffffff /** * The format used for transition tables is based on the GNU flex table * file format (--tables-file option; see Table File Format in the flex * info pages and the flex sources for documentation). The magic number * used in the header is 0x1B5E783D instead of 0xF13C57B1 though, because - * the YY_ID_CHK (check) and YY_ID_DEF (default) tables are used - * slightly differently (see the apparmor-parser package). + * new tables have been defined and others YY_ID_CHK (check) and YY_ID_DEF + * (default) tables are used slightly differently (see the apparmor-parser + * package). + * + * + * The data in the packed dfa is stored in network byte order, and the tables + * are arranged for flexibility. We convert the table data to host native + * byte order. + * + * The dfa begins with a table set header, and is followed by the actual + * tables. */ #define YYTH_MAGIC 0x1B5E783D -#define YYTH_DEF_RECURSE 0x1 /* DEF Table is recursive */ struct table_set_header { u32 th_magic; /* YYTH_MAGIC */ @@ -63,7 +68,7 @@ struct table_set_header { #define YYTD_DATA32 4 #define YYTD_DATA64 8 -/* Each ACCEPT2 table gets 6 dedicated flags, YYTD_DATAX define the +/* ACCEPT & ACCEPT2 tables gets 6 dedicated flags, YYTD_DATAX define the * first flags */ #define ACCEPT1_FLAGS(X) ((X) & 0x3f) @@ -116,6 +121,9 @@ unsigned int aa_dfa_match_len(struct aa_dfa *dfa, unsigned int start, const char *str, int len); unsigned int aa_dfa_match(struct aa_dfa *dfa, unsigned int start, const char *str); +unsigned int aa_dfa_next(struct aa_dfa *dfa, unsigned int state, + const char c); + void aa_dfa_free_kref(struct kref *kref); /** diff --git a/security/apparmor/include/path.h b/security/apparmor/include/path.h index 27b327a7fae..286ac75dc88 100644 --- a/security/apparmor/include/path.h +++ b/security/apparmor/include/path.h @@ -26,6 +26,7 @@ enum path_flags { PATH_MEDIATE_DELETED = 0x10000, /* mediate deleted paths */ }; -int aa_get_name(struct path *path, int flags, char **buffer, const char **name); +int aa_path_name(struct path *path, int flags, char **buffer, + const char **name, const char **info); #endif /* __AA_PATH_H */ diff --git a/security/apparmor/include/policy.h b/security/apparmor/include/policy.h index aeda5cf5690..c28b0f20ab5 100644 --- a/security/apparmor/include/policy.h +++ b/security/apparmor/include/policy.h @@ -29,19 +29,23 @@ #include "file.h" #include "resource.h" -extern const char *profile_mode_names[]; -#define APPARMOR_NAMES_MAX_INDEX 3 +extern const char *const aa_profile_mode_names[]; +#define APPARMOR_MODE_NAMES_MAX_INDEX 4 -#define COMPLAIN_MODE(_profile) \ - ((aa_g_profile_mode == APPARMOR_COMPLAIN) || \ - ((_profile)->mode == APPARMOR_COMPLAIN)) +#define PROFILE_MODE(_profile, _mode) \ + ((aa_g_profile_mode == (_mode)) || \ + ((_profile)->mode == (_mode))) -#define KILL_MODE(_profile) \ - ((aa_g_profile_mode == APPARMOR_KILL) || \ - ((_profile)->mode == APPARMOR_KILL)) +#define COMPLAIN_MODE(_profile) PROFILE_MODE((_profile), APPARMOR_COMPLAIN) + +#define KILL_MODE(_profile) PROFILE_MODE((_profile), APPARMOR_KILL) #define PROFILE_IS_HAT(_profile) ((_profile)->flags & PFLAG_HAT) +#define PROFILE_INVALID(_profile) ((_profile)->flags & PFLAG_INVALID) + +#define on_list_rcu(X) (!list_empty(X) && (X)->prev != LIST_POISON2) + /* * FIXME: currently need a clean way to replace and remove profiles as a * set. It should be done at the namespace level. @@ -52,17 +56,19 @@ enum profile_mode { APPARMOR_ENFORCE, /* enforce access rules */ APPARMOR_COMPLAIN, /* allow and log access violations */ APPARMOR_KILL, /* kill task on access violation */ + APPARMOR_UNCONFINED, /* profile set to unconfined */ }; enum profile_flags { PFLAG_HAT = 1, /* profile is a hat */ - PFLAG_UNCONFINED = 2, /* profile is an unconfined profile */ PFLAG_NULL = 4, /* profile is null learning profile */ PFLAG_IX_ON_NAME_ERROR = 8, /* fallback to ix on name lookup fail */ PFLAG_IMMUTABLE = 0x10, /* don't allow changes/replacement */ PFLAG_USER_DEFINED = 0x20, /* user based profile - lower privs */ PFLAG_NO_LIST_REF = 0x40, /* list doesn't keep profile ref */ PFLAG_OLD_NULL_TRANS = 0x100, /* use // as the null transition */ + PFLAG_INVALID = 0x200, /* profile replaced/removed */ + PFLAG_NS_COUNT = 0x400, /* carries NS ref count */ /* These flags must correspond with PATH_flags */ PFLAG_MEDIATE_DELETED = 0x10000, /* mediate instead delegate deleted */ @@ -73,14 +79,12 @@ struct aa_profile; /* struct aa_policy - common part of both namespaces and profiles * @name: name of the object * @hname - The hierarchical name - * @count: reference count of the obj * @list: list policy object is on * @profiles: head of the profiles list contained in the object */ struct aa_policy { char *name; char *hname; - struct kref count; struct list_head list; struct list_head profiles; }; @@ -105,6 +109,9 @@ struct aa_ns_acct { * @acct: accounting for the namespace * @unconfined: special unconfined profile for the namespace * @sub_ns: list of namespaces under the current namespace. + * @uniq_null: uniq value used for null learning profiles + * @uniq_id: a unique id count for the profiles in the namespace + * @dents: dentries for the namespaces file entries in apparmorfs * * An aa_namespace defines the set profiles that are searched to determine * which profile to attach to a task. Profiles can not be shared between @@ -123,37 +130,63 @@ struct aa_ns_acct { struct aa_namespace { struct aa_policy base; struct aa_namespace *parent; - rwlock_t lock; + struct mutex lock; struct aa_ns_acct acct; struct aa_profile *unconfined; struct list_head sub_ns; + atomic_t uniq_null; + long uniq_id; + + struct dentry *dents[AAFS_NS_SIZEOF]; }; +/* struct aa_policydb - match engine for a policy + * dfa: dfa pattern match + * start: set of start states for the different classes of data + */ +struct aa_policydb { + /* Generic policy DFA specific rule types will be subsections of it */ + struct aa_dfa *dfa; + unsigned int start[AA_CLASS_LAST + 1]; + +}; + +struct aa_replacedby { + struct kref count; + struct aa_profile __rcu *profile; +}; + + /* struct aa_profile - basic confinement data * @base - base components of the profile (name, refcount, lists, lock ...) + * @count: reference count of the obj + * @rcu: rcu head used when removing from @list * @parent: parent of profile * @ns: namespace the profile is in * @replacedby: is set to the profile that replaced this profile * @rename: optional profile name that this profile renamed + * @attach: human readable attachment string * @xmatch: optional extended matching for unconfined executables names * @xmatch_len: xmatch prefix len, used to determine xmatch priority - * @sid: the unique security id number of this profile * @audit: the auditing mode of the profile * @mode: the enforcement mode of the profile * @flags: flags controlling profile behavior * @path_flags: flags controlling path generation behavior * @size: the memory consumed by this profiles rules + * @policy: general match rules governing policy * @file: The set of rules governing basic file access and domain transitions * @caps: capabilities for the profile * @rlimits: rlimits for the profile * + * @dents: dentries for the profiles file entries in apparmorfs + * @dirname: name of the profile dir in apparmorfs + * * The AppArmor profile contains the basic confinement data. Each profile * has a name, and exists in a namespace. The @name and @exec_match are * used to determine profile attachment against unconfined tasks. All other * attachments are determined by profile X transition rules. * - * The @replacedby field is write protected by the profile lock. Reads - * are assumed to be atomic, and are done without locking. + * The @replacedby struct is write protected by the profile lock. * * Profiles have a hierarchy where hats and children profiles keep * a reference to their parent. @@ -164,24 +197,31 @@ struct aa_namespace { */ struct aa_profile { struct aa_policy base; - struct aa_profile *parent; + struct kref count; + struct rcu_head rcu; + struct aa_profile __rcu *parent; struct aa_namespace *ns; - struct aa_profile *replacedby; + struct aa_replacedby *replacedby; const char *rename; + const char *attach; struct aa_dfa *xmatch; int xmatch_len; - u32 sid; enum audit_mode audit; - enum profile_mode mode; - u32 flags; + long mode; + long flags; u32 path_flags; int size; + struct aa_policydb policy; struct aa_file_rules file; struct aa_caps caps; struct aa_rlimit rlimits; + + unsigned char *hash; + char *dirname; + struct dentry *dents[AAFS_PROF_SIZEOF]; }; extern struct aa_namespace *root_ns; @@ -198,43 +238,11 @@ void aa_free_namespace_kref(struct kref *kref); struct aa_namespace *aa_find_namespace(struct aa_namespace *root, const char *name); -static inline struct aa_policy *aa_get_common(struct aa_policy *c) -{ - if (c) - kref_get(&c->count); - - return c; -} - -/** - * aa_get_namespace - increment references count on @ns - * @ns: namespace to increment reference count of (MAYBE NULL) - * - * Returns: pointer to @ns, if @ns is NULL returns NULL - * Requires: @ns must be held with valid refcount when called - */ -static inline struct aa_namespace *aa_get_namespace(struct aa_namespace *ns) -{ - if (ns) - kref_get(&(ns->base.count)); - - return ns; -} - -/** - * aa_put_namespace - decrement refcount on @ns - * @ns: namespace to put reference of - * - * Decrement reference count of @ns and if no longer in use free it - */ -static inline void aa_put_namespace(struct aa_namespace *ns) -{ - if (ns) - kref_put(&ns->base.count, aa_free_namespace_kref); -} +void aa_free_replacedby_kref(struct kref *kref); struct aa_profile *aa_alloc_profile(const char *name); struct aa_profile *aa_new_null_profile(struct aa_profile *parent, int hat); +void aa_free_profile(struct aa_profile *profile); void aa_free_profile_kref(struct kref *kref); struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name); struct aa_profile *aa_lookup_profile(struct aa_namespace *ns, const char *name); @@ -246,25 +254,13 @@ ssize_t aa_remove_profiles(char *name, size_t size); #define PROF_ADD 1 #define PROF_REPLACE 0 -#define unconfined(X) ((X)->flags & PFLAG_UNCONFINED) +#define unconfined(X) ((X)->mode == APPARMOR_UNCONFINED) -/** - * aa_newest_version - find the newest version of @profile - * @profile: the profile to check for newer versions of (NOT NULL) - * - * Returns: newest version of @profile, if @profile is the newest version - * return @profile. - * - * NOTE: the profile returned is not refcounted, The refcount on @profile - * must be held until the caller decides what to do with the returned newest - * version. - */ -static inline struct aa_profile *aa_newest_version(struct aa_profile *profile) -{ - while (profile->replacedby) - profile = profile->replacedby; - return profile; +static inline struct aa_profile *aa_deref_parent(struct aa_profile *p) +{ + return rcu_dereference_protected(p->parent, + mutex_is_locked(&p->ns->lock)); } /** @@ -277,19 +273,126 @@ static inline struct aa_profile *aa_newest_version(struct aa_profile *profile) static inline struct aa_profile *aa_get_profile(struct aa_profile *p) { if (p) - kref_get(&(p->base.count)); + kref_get(&(p->count)); return p; } /** + * aa_get_profile_not0 - increment refcount on profile @p found via lookup + * @p: profile (MAYBE NULL) + * + * Returns: pointer to @p if @p is NULL will return NULL + * Requires: @p must be held with valid refcount when called + */ +static inline struct aa_profile *aa_get_profile_not0(struct aa_profile *p) +{ + if (p && kref_get_not0(&p->count)) + return p; + + return NULL; +} + +/** + * aa_get_profile_rcu - increment a refcount profile that can be replaced + * @p: pointer to profile that can be replaced (NOT NULL) + * + * Returns: pointer to a refcounted profile. + * else NULL if no profile + */ +static inline struct aa_profile *aa_get_profile_rcu(struct aa_profile __rcu **p) +{ + struct aa_profile *c; + + rcu_read_lock(); + do { + c = rcu_dereference(*p); + } while (c && !kref_get_not0(&c->count)); + rcu_read_unlock(); + + return c; +} + +/** + * aa_get_newest_profile - find the newest version of @profile + * @profile: the profile to check for newer versions of + * + * Returns: refcounted newest version of @profile taking into account + * replacement, renames and removals + * return @profile. + */ +static inline struct aa_profile *aa_get_newest_profile(struct aa_profile *p) +{ + if (!p) + return NULL; + + if (PROFILE_INVALID(p)) + return aa_get_profile_rcu(&p->replacedby->profile); + + return aa_get_profile(p); +} + +/** * aa_put_profile - decrement refcount on profile @p * @p: profile (MAYBE NULL) */ static inline void aa_put_profile(struct aa_profile *p) { if (p) - kref_put(&p->base.count, aa_free_profile_kref); + kref_put(&p->count, aa_free_profile_kref); +} + +static inline struct aa_replacedby *aa_get_replacedby(struct aa_replacedby *p) +{ + if (p) + kref_get(&(p->count)); + + return p; +} + +static inline void aa_put_replacedby(struct aa_replacedby *p) +{ + if (p) + kref_put(&p->count, aa_free_replacedby_kref); +} + +/* requires profile list write lock held */ +static inline void __aa_update_replacedby(struct aa_profile *orig, + struct aa_profile *new) +{ + struct aa_profile *tmp; + tmp = rcu_dereference_protected(orig->replacedby->profile, + mutex_is_locked(&orig->ns->lock)); + rcu_assign_pointer(orig->replacedby->profile, aa_get_profile(new)); + orig->flags |= PFLAG_INVALID; + aa_put_profile(tmp); +} + +/** + * aa_get_namespace - increment references count on @ns + * @ns: namespace to increment reference count of (MAYBE NULL) + * + * Returns: pointer to @ns, if @ns is NULL returns NULL + * Requires: @ns must be held with valid refcount when called + */ +static inline struct aa_namespace *aa_get_namespace(struct aa_namespace *ns) +{ + if (ns) + aa_get_profile(ns->unconfined); + + return ns; +} + +/** + * aa_put_namespace - decrement refcount on @ns + * @ns: namespace to put reference of + * + * Decrement reference count of @ns and if no longer in use free it + */ +static inline void aa_put_namespace(struct aa_namespace *ns) +{ + if (ns) + aa_put_profile(ns->unconfined); } static inline int AUDIT_MODE(struct aa_profile *profile) diff --git a/security/apparmor/include/policy_unpack.h b/security/apparmor/include/policy_unpack.h index a2dcccac45a..c214fb88b1b 100644 --- a/security/apparmor/include/policy_unpack.h +++ b/security/apparmor/include/policy_unpack.h @@ -15,6 +15,25 @@ #ifndef __POLICY_INTERFACE_H #define __POLICY_INTERFACE_H -struct aa_profile *aa_unpack(void *udata, size_t size, const char **ns); +#include <linux/list.h> + +struct aa_load_ent { + struct list_head list; + struct aa_profile *new; + struct aa_profile *old; + struct aa_profile *rename; +}; + +void aa_load_ent_free(struct aa_load_ent *ent); +struct aa_load_ent *aa_load_ent_alloc(void); + +#define PACKED_FLAG_HAT 1 + +#define PACKED_MODE_ENFORCE 0 +#define PACKED_MODE_COMPLAIN 1 +#define PACKED_MODE_KILL 2 +#define PACKED_MODE_UNCONFINED 3 + +int aa_unpack(void *udata, size_t size, struct list_head *lh, const char **ns); #endif /* __POLICY_INTERFACE_H */ diff --git a/security/apparmor/include/procattr.h b/security/apparmor/include/procattr.h index 544aa6b766a..6bd5f33d953 100644 --- a/security/apparmor/include/procattr.h +++ b/security/apparmor/include/procattr.h @@ -21,6 +21,5 @@ int aa_getprocattr(struct aa_profile *profile, char **string); int aa_setprocattr_changehat(char *args, size_t size, int test); int aa_setprocattr_changeprofile(char *fqname, bool onexec, int test); -int aa_setprocattr_permipc(char *fqname); #endif /* __AA_PROCATTR_H */ diff --git a/security/apparmor/include/resource.h b/security/apparmor/include/resource.h index 02baec732bb..d3f4cf02795 100644 --- a/security/apparmor/include/resource.h +++ b/security/apparmor/include/resource.h @@ -18,6 +18,8 @@ #include <linux/resource.h> #include <linux/sched.h> +#include "apparmorfs.h" + struct aa_profile; /* struct aa_rlimit - rlimit settings for the profile @@ -32,6 +34,8 @@ struct aa_rlimit { struct rlimit limits[RLIM_NLIMITS]; }; +extern struct aa_fs_entry aa_fs_entry_rlimit[]; + int aa_map_resource(int resource); int aa_task_setrlimit(struct aa_profile *profile, struct task_struct *, unsigned int resource, struct rlimit *new_rlim); diff --git a/security/apparmor/include/sid.h b/security/apparmor/include/sid.h index 020db35c301..513ca0e4896 100644 --- a/security/apparmor/include/sid.h +++ b/security/apparmor/include/sid.h @@ -16,7 +16,9 @@ #include <linux/types.h> -struct aa_profile; +/* sid value that will not be allocated */ +#define AA_SID_INVALID 0 +#define AA_SID_ALLOC AA_SID_INVALID u32 aa_alloc_sid(void); void aa_free_sid(u32 sid); |