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apparmor: change op from int to const char * 

Having ops be an integer that is an index into an op name table is
awkward and brittle. Every op change requires an edit for both the
op constant and a string in the table. Instead switch to using const
strings directly, eliminating the need for the table that needs to
be kept in sync.

Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2017-01-16 00:43:01 -08:00
parent 55a26ebf63
commit 47f6e5cc73
10 changed files with 76 additions and 126 deletions
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4
security/apparmor/apparmorfs.c
View File

@ -85,7 +85,7 @@ static int mangle_name(const char *name, char *target)
* Returns: kernel buffer containing copy of user buffer data or an
* ERR_PTR on failure.
*/
static struct aa_loaddata *aa_simple_write_to_buffer(int op,
static struct aa_loaddata *aa_simple_write_to_buffer(const char *op,
const char __user *userbuf,
size_t alloc_size,
size_t copy_size,
@ -122,7 +122,7 @@ static ssize_t policy_update(int binop, const char __user *buf, size_t size,
ssize_t error;
struct aa_loaddata *data;
struct aa_profile *profile = aa_current_profile();
int op = binop == PROF_ADD ? OP_PROF_LOAD : OP_PROF_REPL;
const char *op = binop == PROF_ADD ? OP_PROF_LOAD : OP_PROF_REPL;
/* high level check about policy management - fine grained in
* below after unpack
*/

55
security/apparmor/audit.c
View File

@ -20,59 +20,6 @@
#include "include/policy.h"
#include "include/policy_ns.h"
const char *const op_table[] = {
"null",
"sysctl",
"capable",
"unlink",
"mkdir",
"rmdir",
"mknod",
"truncate",
"link",
"symlink",
"rename_src",
"rename_dest",
"chmod",
"chown",
"getattr",
"open",
"file_perm",
"file_lock",
"file_mmap",
"file_mprotect",
"create",
"post_create",
"bind",
"connect",
"listen",
"accept",
"sendmsg",
"recvmsg",
"getsockname",
"getpeername",
"getsockopt",
"setsockopt",
"socket_shutdown",
"ptrace",
"exec",
"change_hat",
"change_profile",
"change_onexec",
"setprocattr",
"setrlimit",
"profile_replace",
"profile_load",
"profile_remove"
};
const char *const audit_mode_names[] = {
"normal",
@ -120,7 +67,7 @@ static void audit_pre(struct audit_buffer *ab, void *ca)
if (sa->aad->op) {
audit_log_format(ab, " operation=");
audit_log_string(ab, op_table[sa->aad->op]);
audit_log_string(ab, sa->aad->op);
}
if (sa->aad->info) {

4
security/apparmor/domain.c
View File

@ -750,8 +750,8 @@ int aa_change_profile(const char *ns_name, const char *hname, bool onexec,
struct aa_profile *profile, *target = NULL;
struct aa_ns *ns = NULL;
struct file_perms perms = {};
const char *name = NULL, *info = NULL;
int op, error = 0;
const char *name = NULL, *info = NULL, *op;
int error = 0;
u32 request;
if (!hname && !ns_name)

9
security/apparmor/file.c
View File

@ -104,7 +104,7 @@ static void file_audit_cb(struct audit_buffer *ab, void *va)
* Returns: %0 or error on failure
*/
int aa_audit_file(struct aa_profile *profile, struct file_perms *perms,
gfp_t gfp, int op, u32 request, const char *name,
gfp_t gfp, const char *op, u32 request, const char *name,
const char *target, kuid_t ouid, const char *info, int error)
{
int type = AUDIT_APPARMOR_AUTO;
@ -276,8 +276,9 @@ static inline bool is_deleted(struct dentry *dentry)
*
* Returns: %0 else error if access denied or other error
*/
int aa_path_perm(int op, struct aa_profile *profile, const struct path *path,
int flags, u32 request, struct path_cond *cond)
int aa_path_perm(const char *op, struct aa_profile *profile,
const struct path *path, int flags, u32 request,
struct path_cond *cond)
{
char *buffer = NULL;
struct file_perms perms = {};
@ -446,7 +447,7 @@ audit:
*
* Returns: %0 if access allowed else error
*/
int aa_file_perm(int op, struct aa_profile *profile, struct file *file,
int aa_file_perm(const char *op, struct aa_profile *profile, struct file *file,
u32 request)
{
struct path_cond cond = {

92
security/apparmor/include/audit.h
View File

@ -46,65 +46,63 @@ enum audit_type {
AUDIT_APPARMOR_AUTO
};
extern const char *const op_table[];
enum aa_ops {
OP_NULL,
#define OP_NULL NULL
OP_SYSCTL,
OP_CAPABLE,
#define OP_SYSCTL "sysctl"
#define OP_CAPABLE "capable"
OP_UNLINK,
OP_MKDIR,
OP_RMDIR,
OP_MKNOD,
OP_TRUNC,
OP_LINK,
OP_SYMLINK,
OP_RENAME_SRC,
OP_RENAME_DEST,
OP_CHMOD,
OP_CHOWN,
OP_GETATTR,
OP_OPEN,
#define OP_UNLINK "unlink"
#define OP_MKDIR "mkdir"
#define OP_RMDIR "rmdir"
#define OP_MKNOD "mknod"
#define OP_TRUNC "truncate"
#define OP_LINK "link"
#define OP_SYMLINK "symlink"
#define OP_RENAME_SRC "rename_src"
#define OP_RENAME_DEST "rename_dest"
#define OP_CHMOD "chmod"
#define OP_CHOWN "chown"
#define OP_GETATTR "getattr"
#define OP_OPEN "open"
OP_FPERM,
OP_FLOCK,
OP_FMMAP,
OP_FMPROT,
#define OP_FPERM "file_perm"
#define OP_FLOCK "file_lock"
#define OP_FMMAP "file_mmap"
#define OP_FMPROT "file_mprotect"
OP_CREATE,
OP_POST_CREATE,
OP_BIND,
OP_CONNECT,
OP_LISTEN,
OP_ACCEPT,
OP_SENDMSG,
OP_RECVMSG,
OP_GETSOCKNAME,
OP_GETPEERNAME,
OP_GETSOCKOPT,
OP_SETSOCKOPT,
OP_SOCK_SHUTDOWN,
#define OP_CREATE "create"
#define OP_POST_CREATE "post_create"
#define OP_BIND "bind"
#define OP_CONNECT "connect"
#define OP_LISTEN "listen"
#define OP_ACCEPT "accept"
#define OP_SENDMSG "sendmsg"
#define OP_RECVMSG "recvmsg"
#define OP_GETSOCKNAME "getsockname"
#define OP_GETPEERNAME "getpeername"
#define OP_GETSOCKOPT "getsockopt"
#define OP_SETSOCKOPT "setsockopt"
#define OP_SHUTDOWN "socket_shutdown"
OP_PTRACE,
#define OP_PTRACE "ptrace"
OP_EXEC,
OP_CHANGE_HAT,
OP_CHANGE_PROFILE,
OP_CHANGE_ONEXEC,
#define OP_EXEC "exec"
OP_SETPROCATTR,
OP_SETRLIMIT,
#define OP_CHANGE_HAT "change_hat"
#define OP_CHANGE_PROFILE "change_profile"
#define OP_CHANGE_ONEXEC "change_onexec"
OP_PROF_REPL,
OP_PROF_LOAD,
OP_PROF_RM,
};
#define OP_SETPROCATTR "setprocattr"
#define OP_SETRLIMIT "setrlimit"
#define OP_PROF_REPL "profile_replace"
#define OP_PROF_LOAD "profile_load"
#define OP_PROF_RM "profile_remove"
struct apparmor_audit_data {
int error;
int op;
const char *op;
int type;
void *profile;
const char *name;

9
security/apparmor/include/file.h
View File

@ -145,7 +145,7 @@ static inline u16 dfa_map_xindex(u16 mask)
dfa_map_xindex((ACCEPT_TABLE(dfa)[state] >> 14) & 0x3fff)
int aa_audit_file(struct aa_profile *profile, struct file_perms *perms,
gfp_t gfp, int op, u32 request, const char *name,
gfp_t gfp, const char *op, u32 request, const char *name,
const char *target, kuid_t ouid, const char *info, int error);
/**
@ -171,13 +171,14 @@ unsigned int aa_str_perms(struct aa_dfa *dfa, unsigned int start,
const char *name, struct path_cond *cond,
struct file_perms *perms);
int aa_path_perm(int op, struct aa_profile *profile, const struct path *path,
int flags, u32 request, struct path_cond *cond);
int aa_path_perm(const char *op, struct aa_profile *profile,
const struct path *path, int flags, u32 request,
struct path_cond *cond);
int aa_path_link(struct aa_profile *profile, struct dentry *old_dentry,
const struct path *new_dir, struct dentry *new_dentry);
int aa_file_perm(int op, struct aa_profile *profile, struct file *file,
int aa_file_perm(const char *op, struct aa_profile *profile, struct file *file,
u32 request);
static inline void aa_free_file_rules(struct aa_file_rules *rules)

3
security/apparmor/include/policy.h
View File

@ -303,6 +303,7 @@ static inline int AUDIT_MODE(struct aa_profile *profile)
bool policy_view_capable(struct aa_ns *ns);
bool policy_admin_capable(struct aa_ns *ns);
int aa_may_manage_policy(struct aa_profile *profile, struct aa_ns *ns, int op);
int aa_may_manage_policy(struct aa_profile *profile, struct aa_ns *ns,
const char *op);
#endif /* __AA_POLICY_H */

15
security/apparmor/lsm.c
View File

@ -152,7 +152,7 @@ static int apparmor_capable(const struct cred *cred, struct user_namespace *ns,
*
* Returns: %0 else error code if error or permission denied
*/
static int common_perm(int op, const struct path *path, u32 mask,
static int common_perm(const char *op, const struct path *path, u32 mask,
struct path_cond *cond)
{
struct aa_profile *profile;
@ -175,7 +175,7 @@ static int common_perm(int op, const struct path *path, u32 mask,
*
* Returns: %0 else error code if error or permission denied
*/
static int common_perm_dir_dentry(int op, const struct path *dir,
static int common_perm_dir_dentry(const char *op, const struct path *dir,
struct dentry *dentry, u32 mask,
struct path_cond *cond)
{
@ -192,7 +192,8 @@ static int common_perm_dir_dentry(int op, const struct path *dir,
*
* Returns: %0 else error code if error or permission denied
*/
static inline int common_perm_path(int op, const struct path *path, u32 mask)
static inline int common_perm_path(const char *op, const struct path *path,
u32 mask)
{
struct path_cond cond = { d_backing_inode(path->dentry)->i_uid,
d_backing_inode(path->dentry)->i_mode
@ -212,7 +213,7 @@ static inline int common_perm_path(int op, const struct path *path, u32 mask)
*
* Returns: %0 else error code if error or permission denied
*/
static int common_perm_rm(int op, const struct path *dir,
static int common_perm_rm(const char *op, const struct path *dir,
struct dentry *dentry, u32 mask)
{
struct inode *inode = d_backing_inode(dentry);
@ -237,7 +238,7 @@ static int common_perm_rm(int op, const struct path *dir,
*
* Returns: %0 else error code if error or permission denied
*/
static int common_perm_create(int op, const struct path *dir,
static int common_perm_create(const char *op, const struct path *dir,
struct dentry *dentry, u32 mask, umode_t mode)
{
struct path_cond cond = { current_fsuid(), mode };
@ -395,7 +396,7 @@ static void apparmor_file_free_security(struct file *file)
aa_free_file_context(ctx);
}
static int common_file_perm(int op, struct file *file, u32 mask)
static int common_file_perm(const char *op, struct file *file, u32 mask)
{
struct aa_file_ctx *fctx = file->f_security;
struct aa_profile *profile, *fprofile = aa_cred_profile(file->f_cred);
@ -438,7 +439,7 @@ static int apparmor_file_lock(struct file *file, unsigned int cmd)
return common_file_perm(OP_FLOCK, file, mask);
}
static int common_mmap(int op, struct file *file, unsigned long prot,
static int common_mmap(const char *op, struct file *file, unsigned long prot,
unsigned long flags)
{
int mask = 0;

7
security/apparmor/policy.c
View File

@ -606,7 +606,7 @@ static void audit_cb(struct audit_buffer *ab, void *va)
*
* Returns: the error to be returned after audit is done
*/
static int audit_policy(struct aa_profile *profile, int op, gfp_t gfp,
static int audit_policy(struct aa_profile *profile, const char *op, gfp_t gfp,
const char *nsname, const char *name,
const char *info, int error)
{
@ -670,7 +670,8 @@ bool policy_admin_capable(struct aa_ns *ns)
*
* Returns: 0 if the task is allowed to manipulate policy else error
*/
int aa_may_manage_policy(struct aa_profile *profile, struct aa_ns *ns, int op)
int aa_may_manage_policy(struct aa_profile *profile, struct aa_ns *ns,
const char *op)
{
/* check if loading policy is locked out */
if (aa_g_lock_policy)
@ -819,7 +820,7 @@ ssize_t aa_replace_profiles(struct aa_ns *view, struct aa_profile *profile,
const char *ns_name, *info = NULL;
struct aa_ns *ns = NULL;
struct aa_load_ent *ent, *tmp;
int op = OP_PROF_REPL;
const char *op = OP_PROF_REPL;
ssize_t count, error;
LIST_HEAD(lh);

4
security/apparmor/procattr.c
View File

@ -88,13 +88,13 @@ int aa_getprocattr(struct aa_profile *profile, char **string)
*
* Returns: start position of name after token else NULL on failure
*/
static char *split_token_from_name(int op, char *args, u64 * token)
static char *split_token_from_name(const char *op, char *args, u64 *token)
{
char *name;
*token = simple_strtoull(args, &name, 16);
if ((name == args) || *name != '^') {
AA_ERROR("%s: Invalid input '%s'", op_table[op], args);
AA_ERROR("%s: Invalid input '%s'", op, args);
return ERR_PTR(-EINVAL);
}