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-rw-r--r--security/smack/smack.h108
-rw-r--r--security/smack/smack_access.c143
-rw-r--r--security/smack/smack_lsm.c390
-rw-r--r--security/smack/smackfs.c66
4 files changed, 597 insertions, 110 deletions
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 42ef313..243bec1 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -20,6 +20,7 @@
#include <net/netlabel.h>
#include <linux/list.h>
#include <linux/rculist.h>
+#include <linux/lsm_audit.h>
/*
* Why 23? CIPSO is constrained to 30, so a 32 byte buffer is
@@ -179,6 +180,20 @@ struct smack_known {
#define MAY_NOT 0
/*
+ * Number of access types used by Smack (rwxa)
+ */
+#define SMK_NUM_ACCESS_TYPE 4
+
+/*
+ * 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;
+#endif
+};
+/*
* These functions are in smack_lsm.c
*/
struct inode_smack *new_inode_smack(char *);
@@ -186,8 +201,8 @@ struct inode_smack *new_inode_smack(char *);
/*
* These functions are in smack_access.c
*/
-int smk_access(char *, char *, int);
-int smk_curacc(char *, u32);
+int smk_access(char *, char *, int, struct smk_audit_info *);
+int smk_curacc(char *, u32, struct smk_audit_info *);
int smack_to_cipso(const char *, struct smack_cipso *);
void smack_from_cipso(u32, char *, char *);
char *smack_from_secid(const u32);
@@ -237,4 +252,93 @@ static inline char *smk_of_inode(const struct inode *isp)
return sip->smk_inode;
}
+/*
+ * 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, 0, sizeof(*a));
+ a->a.type = type;
+ a->a.function = func;
+}
+
+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.fs.path.dentry = d;
+}
+static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
+ struct vfsmount *m)
+{
+ a->a.u.fs.path.mnt = m;
+}
+static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
+ struct inode *i)
+{
+ a->a.u.fs.inode = i;
+}
+static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
+ struct path p)
+{
+ a->a.u.fs.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_path_mnt(struct smk_audit_info *a,
+ struct vfsmount *m)
+{
+}
+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 */
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index ac0a270..513dc1a 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -59,11 +59,18 @@ LIST_HEAD(smack_known_list);
*/
static u32 smack_next_secid = 10;
+/*
+ * what events do we log
+ * can be overwritten at run-time by /smack/logging
+ */
+int log_policy = SMACK_AUDIT_DENIED;
+
/**
* smk_access - determine if a subject has a specific access to an object
* @subject_label: a pointer to the subject's Smack label
* @object_label: a pointer to the object's Smack label
* @request: the access requested, in "MAY" format
+ * @a : a pointer to the audit data
*
* This function looks up the subject/object pair in the
* access rule list and returns 0 if the access is permitted,
@@ -78,10 +85,12 @@ static u32 smack_next_secid = 10;
* will be on the list, so checking the pointers may be a worthwhile
* optimization.
*/
-int smk_access(char *subject_label, char *object_label, int request)
+int smk_access(char *subject_label, char *object_label, int request,
+ struct smk_audit_info *a)
{
u32 may = MAY_NOT;
struct smack_rule *srp;
+ int rc = 0;
/*
* Hardcoded comparisons.
@@ -89,8 +98,10 @@ int smk_access(char *subject_label, char *object_label, int request)
* A star subject can't access any object.
*/
if (subject_label == smack_known_star.smk_known ||
- strcmp(subject_label, smack_known_star.smk_known) == 0)
- return -EACCES;
+ strcmp(subject_label, smack_known_star.smk_known) == 0) {
+ rc = -EACCES;
+ goto out_audit;
+ }
/*
* An internet object can be accessed by any subject.
* Tasks cannot be assigned the internet label.
@@ -100,20 +111,20 @@ int smk_access(char *subject_label, char *object_label, int request)
subject_label == smack_known_web.smk_known ||
strcmp(object_label, smack_known_web.smk_known) == 0 ||
strcmp(subject_label, smack_known_web.smk_known) == 0)
- return 0;
+ goto out_audit;
/*
* A star object can be accessed by any subject.
*/
if (object_label == smack_known_star.smk_known ||
strcmp(object_label, smack_known_star.smk_known) == 0)
- return 0;
+ goto out_audit;
/*
* An object can be accessed in any way by a subject
* with the same label.
*/
if (subject_label == object_label ||
strcmp(subject_label, object_label) == 0)
- return 0;
+ goto out_audit;
/*
* A hat subject can read any object.
* A floor object can be read by any subject.
@@ -121,10 +132,10 @@ int smk_access(char *subject_label, char *object_label, int request)
if ((request & MAY_ANYREAD) == request) {
if (object_label == smack_known_floor.smk_known ||
strcmp(object_label, smack_known_floor.smk_known) == 0)
- return 0;
+ goto out_audit;
if (subject_label == smack_known_hat.smk_known ||
strcmp(subject_label, smack_known_hat.smk_known) == 0)
- return 0;
+ goto out_audit;
}
/*
* Beyond here an explicit relationship is required.
@@ -148,28 +159,36 @@ int smk_access(char *subject_label, char *object_label, int request)
* This is a bit map operation.
*/
if ((request & may) == request)
- return 0;
-
- return -EACCES;
+ goto out_audit;
+
+ rc = -EACCES;
+out_audit:
+#ifdef CONFIG_AUDIT
+ if (a)
+ smack_log(subject_label, object_label, request, rc, a);
+#endif
+ return rc;
}
/**
* smk_curacc - determine if current has a specific access to an object
* @obj_label: a pointer to the object's Smack label
* @mode: the access requested, in "MAY" format
+ * @a : common audit data
*
* This function checks the current subject label/object label pair
* in the access rule list and returns 0 if the access is permitted,
* non zero otherwise. It allows that current may have the capability
* to override the rules.
*/
-int smk_curacc(char *obj_label, u32 mode)
+int smk_curacc(char *obj_label, u32 mode, struct smk_audit_info *a)
{
int rc;
+ char *sp = current_security();
- rc = smk_access(current_security(), obj_label, mode);
+ rc = smk_access(sp, obj_label, mode, NULL);
if (rc == 0)
- return 0;
+ goto out_audit;
/*
* Return if a specific label has been designated as the
@@ -177,14 +196,105 @@ int smk_curacc(char *obj_label, u32 mode)
* have that label.
*/
if (smack_onlycap != NULL && smack_onlycap != current->cred->security)
- return rc;
+ goto out_audit;
if (capable(CAP_MAC_OVERRIDE))
return 0;
+out_audit:
+#ifdef CONFIG_AUDIT
+ if (a)
+ smack_log(sp, obj_label, mode, rc, a);
+#endif
return rc;
}
+#ifdef CONFIG_AUDIT
+/**
+ * smack_str_from_perm : helper to transalate an int to a
+ * readable string
+ * @string : the string to fill
+ * @access : the int
+ *
+ */
+static inline void smack_str_from_perm(char *string, int access)
+{
+ int i = 0;
+ if (access & MAY_READ)
+ string[i++] = 'r';
+ if (access & MAY_WRITE)
+ string[i++] = 'w';
+ if (access & MAY_EXEC)
+ string[i++] = 'x';
+ if (access & MAY_APPEND)
+ string[i++] = 'a';
+ string[i] = '\0';
+}
+/**
+ * smack_log_callback - SMACK specific information
+ * will be called by generic audit code
+ * @ab : the audit_buffer
+ * @a : audit_data
+ *
+ */
+static void smack_log_callback(struct audit_buffer *ab, void *a)
+{
+ struct common_audit_data *ad = a;
+ struct smack_audit_data *sad = &ad->lsm_priv.smack_audit_data;
+ audit_log_format(ab, "lsm=SMACK fn=%s action=%s", ad->function,
+ sad->result ? "denied" : "granted");
+ audit_log_format(ab, " subject=");
+ audit_log_untrustedstring(ab, sad->subject);
+ audit_log_format(ab, " object=");
+ audit_log_untrustedstring(ab, sad->object);
+ audit_log_format(ab, " requested=%s", sad->request);
+}
+
+/**
+ * smack_log - Audit the granting or denial of permissions.
+ * @subject_label : smack label of the requester
+ * @object_label : smack label of the object being accessed
+ * @request: requested permissions
+ * @result: result from smk_access
+ * @a: auxiliary audit data
+ *
+ * Audit the granting or denial of permissions in accordance
+ * with the policy.
+ */
+void smack_log(char *subject_label, char *object_label, int request,
+ int result, struct smk_audit_info *ad)
+{
+ char request_buffer[SMK_NUM_ACCESS_TYPE + 1];
+ struct smack_audit_data *sad;
+ struct common_audit_data *a = &ad->a;
+
+ /* check if we have to log the current event */
+ if (result != 0 && (log_policy & SMACK_AUDIT_DENIED) == 0)
+ return;
+ if (result == 0 && (log_policy & SMACK_AUDIT_ACCEPT) == 0)
+ return;
+
+ if (a->function == NULL)
+ a->function = "unknown";
+
+ /* end preparing the audit data */
+ sad = &a->lsm_priv.smack_audit_data;
+ smack_str_from_perm(request_buffer, request);
+ sad->subject = subject_label;
+ sad->object = object_label;
+ sad->request = request_buffer;
+ sad->result = result;
+ a->lsm_pre_audit = smack_log_callback;
+
+ common_lsm_audit(a);
+}
+#else /* #ifdef CONFIG_AUDIT */
+void smack_log(char *subject_label, char *object_label, int request,
+ int result, struct smk_audit_info *ad)
+{
+}
+#endif
+
static DEFINE_MUTEX(smack_known_lock);
/**
@@ -209,7 +319,8 @@ struct smack_known *smk_import_entry(const char *string, int len)
if (found)
smack[i] = '\0';
else if (i >= len || string[i] > '~' || string[i] <= ' ' ||
- string[i] == '/') {
+ string[i] == '/' || string[i] == '"' ||
+ string[i] == '\\' || string[i] == '\'') {
smack[i] = '\0';
found = 1;
} else
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 98b3195..0d030b4 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -30,7 +30,6 @@
#include <net/netlabel.h>
#include <net/cipso_ipv4.h>
#include <linux/audit.h>
-
#include "smack.h"
#define task_security(task) (task_cred_xxx((task), security))
@@ -103,14 +102,24 @@ struct inode_smack *new_inode_smack(char *smack)
static int smack_ptrace_may_access(struct task_struct *ctp, unsigned int mode)
{
int rc;
+ struct smk_audit_info ad;
+ char *sp, *tsp;
rc = cap_ptrace_may_access(ctp, mode);
if (rc != 0)
return rc;
- rc = smk_access(current_security(), task_security(ctp), MAY_READWRITE);
+ sp = current_security();
+ tsp = task_security(ctp);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
+ smk_ad_setfield_u_tsk(&ad, ctp);
+
+ /* we won't log here, because rc can be overriden */
+ rc = smk_access(sp, tsp, MAY_READWRITE, NULL);
if (rc != 0 && capable(CAP_MAC_OVERRIDE))
- return 0;
+ rc = 0;
+
+ smack_log(sp, tsp, MAY_READWRITE, rc, &ad);
return rc;
}
@@ -125,14 +134,24 @@ static int smack_ptrace_may_access(struct task_struct *ctp, unsigned int mode)
static int smack_ptrace_traceme(struct task_struct *ptp)
{
int rc;
+ struct smk_audit_info ad;
+ char *sp, *tsp;
rc = cap_ptrace_traceme(ptp);
if (rc != 0)
return rc;
- rc = smk_access(task_security(ptp), current_security(), MAY_READWRITE);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
+ smk_ad_setfield_u_tsk(&ad, ptp);
+
+ sp = current_security();
+ tsp = task_security(ptp);
+ /* we won't log here, because rc can be overriden */
+ rc = smk_access(tsp, sp, MAY_READWRITE, NULL);
if (rc != 0 && has_capability(ptp, CAP_MAC_OVERRIDE))
- return 0;
+ rc = 0;
+
+ smack_log(tsp, sp, MAY_READWRITE, rc, &ad);
return rc;
}
@@ -327,8 +346,14 @@ static int smack_sb_kern_mount(struct super_block *sb, int flags, void *data)
static int smack_sb_statfs(struct dentry *dentry)
{
struct superblock_smack *sbp = dentry->d_sb->s_security;
+ int rc;
+ struct smk_audit_info ad;
- return smk_curacc(sbp->smk_floor, MAY_READ);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
+
+ rc = smk_curacc(sbp->smk_floor, MAY_READ, &ad);
+ return rc;
}
/**
@@ -346,8 +371,12 @@ static int smack_sb_mount(char *dev_name, struct path *path,
char *type, unsigned long flags, void *data)
{
struct superblock_smack *sbp = path->mnt->mnt_sb->s_security;
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path(&ad, *path);
- return smk_curacc(sbp->smk_floor, MAY_WRITE);
+ return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad);
}
/**
@@ -361,10 +390,14 @@ static int smack_sb_mount(char *dev_name, struct path *path,
static int smack_sb_umount(struct vfsmount *mnt, int flags)
{
struct superblock_smack *sbp;
+ struct smk_audit_info ad;
- sbp = mnt->mnt_sb->s_security;
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, mnt->mnt_mountpoint);
+ smk_ad_setfield_u_fs_path_mnt(&ad, mnt);
- return smk_curacc(sbp->smk_floor, MAY_WRITE);
+ sbp = mnt->mnt_sb->s_security;
+ return smk_curacc(sbp->smk_floor, MAY_WRITE, &ad);
}
/*
@@ -441,15 +474,20 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
static int smack_inode_link(struct dentry *old_dentry, struct inode *dir,
struct dentry *new_dentry)
{
- int rc;
char *isp;
+ struct smk_audit_info ad;
+ int rc;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry);
isp = smk_of_inode(old_dentry->d_inode);
- rc = smk_curacc(isp, MAY_WRITE);
+ rc = smk_curacc(isp, MAY_WRITE, &ad);
if (rc == 0 && new_dentry->d_inode != NULL) {
isp = smk_of_inode(new_dentry->d_inode);
- rc = smk_curacc(isp, MAY_WRITE);
+ smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry);
+ rc = smk_curacc(isp, MAY_WRITE, &ad);
}
return rc;
@@ -466,18 +504,24 @@ static int smack_inode_link(struct dentry *old_dentry, struct inode *dir,
static int smack_inode_unlink(struct inode *dir, struct dentry *dentry)
{
struct inode *ip = dentry->d_inode;
+ struct smk_audit_info ad;
int rc;
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
+
/*
* You need write access to the thing you're unlinking
*/
- rc = smk_curacc(smk_of_inode(ip), MAY_WRITE);
- if (rc == 0)
+ rc = smk_curacc(smk_of_inode(ip), MAY_WRITE, &ad);
+ if (rc == 0) {
/*
* You also need write access to the containing directory
*/
- rc = smk_curacc(smk_of_inode(dir), MAY_WRITE);
-
+ smk_ad_setfield_u_fs_path_dentry(&ad, NULL);
+ smk_ad_setfield_u_fs_inode(&ad, dir);
+ rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad);
+ }
return rc;
}
@@ -491,17 +535,24 @@ static int smack_inode_unlink(struct inode *dir, struct dentry *dentry)
*/
static int smack_inode_rmdir(struct inode *dir, struct dentry *dentry)
{
+ struct smk_audit_info ad;
int rc;
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
+
/*
* You need write access to the thing you're removing
*/
- rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE);
- if (rc == 0)
+ rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
+ if (rc == 0) {
/*
* You also need write access to the containing directory
*/
- rc = smk_curacc(smk_of_inode(dir), MAY_WRITE);
+ smk_ad_setfield_u_fs_path_dentry(&ad, NULL);
+ smk_ad_setfield_u_fs_inode(&ad, dir);
+ rc = smk_curacc(smk_of_inode(dir), MAY_WRITE, &ad);
+ }
return rc;
}
@@ -525,15 +576,19 @@ static int smack_inode_rename(struct inode *old_inode,
{
int rc;
char *isp;
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, old_dentry);
isp = smk_of_inode(old_dentry->d_inode);
- rc = smk_curacc(isp, MAY_READWRITE);
+ rc = smk_curacc(isp, MAY_READWRITE, &ad);
if (rc == 0 && new_dentry->d_inode != NULL) {
isp = smk_of_inode(new_dentry->d_inode);
- rc = smk_curacc(isp, MAY_READWRITE);
+ smk_ad_setfield_u_fs_path_dentry(&ad, new_dentry);
+ rc = smk_curacc(isp, MAY_READWRITE, &ad);
}
-
return rc;
}
@@ -548,13 +603,15 @@ static int smack_inode_rename(struct inode *old_inode,
*/
static int smack_inode_permission(struct inode *inode, int mask)
{
+ struct smk_audit_info ad;
/*
* No permission to check. Existence test. Yup, it's there.
*/
if (mask == 0)
return 0;
-
- return smk_curacc(smk_of_inode(inode), mask);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_inode(&ad, inode);
+ return smk_curacc(smk_of_inode(inode), mask, &ad);
}
/**
@@ -566,13 +623,16 @@ static int smack_inode_permission(struct inode *inode, int mask)
*/
static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
{
+ struct smk_audit_info ad;
/*
* Need to allow for clearing the setuid bit.
*/
if (iattr->ia_valid & ATTR_FORCE)
return 0;
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
- return smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE);
+ return smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
}
/**
@@ -584,7 +644,12 @@ static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
*/
static int smack_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
{
- return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ);
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
+ smk_ad_setfield_u_fs_path_mnt(&ad, mnt);
+ return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad);
}
/**
@@ -602,6 +667,7 @@ static int smack_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
static int smack_inode_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
+ struct smk_audit_info ad;
int rc = 0;
if (strcmp(name, XATTR_NAME_SMACK) == 0 ||
@@ -619,8 +685,11 @@ static int smack_inode_setxattr(struct dentry *dentry, const char *name,
} else
rc = cap_inode_setxattr(dentry, name, value, size, flags);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
+
if (rc == 0)
- rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE);
+ rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
return rc;
}
@@ -672,7 +741,12 @@ static void smack_inode_post_setxattr(struct dentry *dentry, const char *name,
*/
static int smack_inode_getxattr(struct dentry *dentry, const char *name)
{
- return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ);
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
+
+ return smk_curacc(smk_of_inode(dentry->d_inode), MAY_READ, &ad);
}
/*
@@ -686,6 +760,7 @@ static int smack_inode_getxattr(struct dentry *dentry, const char *name)
*/
static int smack_inode_removexattr(struct dentry *dentry, const char *name)
{
+ struct smk_audit_info ad;
int rc = 0;
if (strcmp(name, XATTR_NAME_SMACK) == 0 ||
@@ -696,8 +771,10 @@ static int smack_inode_removexattr(struct dentry *dentry, const char *name)
} else
rc = cap_inode_removexattr(dentry, name);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, dentry);
if (rc == 0)
- rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE);
+ rc = smk_curacc(smk_of_inode(dentry->d_inode), MAY_WRITE, &ad);
return rc;
}
@@ -856,12 +933,16 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
int rc = 0;
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path(&ad, file->f_path);
if (_IOC_DIR(cmd) & _IOC_WRITE)
- rc = smk_curacc(file->f_security, MAY_WRITE);
+ rc = smk_curacc(file->f_security, MAY_WRITE, &ad);
if (rc == 0 && (_IOC_DIR(cmd) & _IOC_READ))
- rc = smk_curacc(file->f_security, MAY_READ);
+ rc = smk_curacc(file->f_security, MAY_READ, &ad);
return rc;
}
@@ -875,7 +956,11 @@ static int smack_file_ioctl(struct file *file, unsigned int cmd,
*/
static int smack_file_lock(struct file *file, unsigned int cmd)
{
- return smk_curacc(file->f_security, MAY_WRITE);
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path_dentry(&ad, file->f_path.dentry);
+ return smk_curacc(file->f_security, MAY_WRITE, &ad);
}
/**
@@ -889,8 +974,12 @@ static int smack_file_lock(struct file *file, unsigned int cmd)
static int smack_file_fcntl(struct file *file, unsigned int cmd,
unsigned long arg)
{
+ struct smk_audit_info ad;
int rc;
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_FS);
+ smk_ad_setfield_u_fs_path(&ad, file->f_path);
+
switch (cmd) {
case F_DUPFD:
case F_GETFD:
@@ -898,7 +987,7 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
case F_GETLK:
case F_GETOWN:
case F_GETSIG:
- rc = smk_curacc(file->f_security, MAY_READ);
+ rc = smk_curacc(file->f_security, MAY_READ, &ad);
break;
case F_SETFD:
case F_SETFL:
@@ -906,10 +995,10 @@ static int smack_file_fcntl(struct file *file, unsigned int cmd,
case F_SETLKW:
case F_SETOWN:
case F_SETSIG:
- rc = smk_curacc(file->f_security, MAY_WRITE);
+ rc = smk_curacc(file->f_security, MAY_WRITE, &ad);
break;
default:
- rc = smk_curacc(file->f_security, MAY_READWRITE);
+ rc = smk_curacc(file->f_security, MAY_READWRITE, &ad);
}
return rc;
@@ -944,14 +1033,21 @@ static int smack_file_send_sigiotask(struct task_struct *tsk,
{
struct file *file;
int rc;
+ char *tsp = tsk->cred->security;
+ struct smk_audit_info ad;
/*
* struct fown_struct is never outside the context of a struct file
*/
file = container_of(fown, struct file, f_owner);
- rc = smk_access(file->f_security, tsk->cred->security, MAY_WRITE);
+ /* we don't log here as rc can be overriden */
+ rc = smk_access(file->f_security, tsp, MAY_WRITE, NULL);
if (rc != 0 && has_capability(tsk, CAP_MAC_OVERRIDE))
- return 0;
+ rc = 0;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
+ smk_ad_setfield_u_tsk(&ad, tsk);
+ smack_log(file->f_security, tsp, MAY_WRITE, rc, &ad);
return rc;
}
@@ -964,7 +1060,10 @@ static int smack_file_send_sigiotask(struct task_struct *tsk,
static int smack_file_receive(struct file *file)
{
int may = 0;
+ struct smk_audit_info ad;
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
+ smk_ad_setfield_u_fs_path(&ad, file->f_path);
/*
* This code relies on bitmasks.
*/
@@ -973,7 +1072,7 @@ static int smack_file_receive(struct file *file)
if (file->f_mode & FMODE_WRITE)
may |= MAY_WRITE;
- return smk_curacc(file->f_security, may);
+ return smk_curacc(file->f_security, may, &ad);
}
/*
@@ -1053,6 +1152,22 @@ static int smack_kernel_create_files_as(struct cred *new,
}
/**
+ * smk_curacc_on_task - helper to log task related access
+ * @p: the task object
+ * @access : the access requested
+ *
+ * Return 0 if access is permitted
+ */
+static int smk_curacc_on_task(struct task_struct *p, int access)
+{
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
+ smk_ad_setfield_u_tsk(&ad, p);
+ return smk_curacc(task_security(p), access, &ad);
+}
+
+/**
* smack_task_setpgid - Smack check on setting pgid
* @p: the task object
* @pgid: unused
@@ -1061,7 +1176,7 @@ static int smack_kernel_create_files_as(struct cred *new,
*/
static int smack_task_setpgid(struct task_struct *p, pid_t pgid)
{
- return smk_curacc(task_security(p), MAY_WRITE);
+ return smk_curacc_on_task(p, MAY_WRITE);
}
/**
@@ -1072,7 +1187,7 @@ static int smack_task_setpgid(struct task_struct *p, pid_t pgid)
*/
static int smack_task_getpgid(struct task_struct *p)
{
- return smk_curacc(task_security(p), MAY_READ);
+ return smk_curacc_on_task(p, MAY_READ);
}
/**
@@ -1083,7 +1198,7 @@ static int smack_task_getpgid(struct task_struct *p)
*/
static int smack_task_getsid(struct task_struct *p)
{
- return smk_curacc(task_security(p), MAY_READ);
+ return smk_curacc_on_task(p, MAY_READ);
}
/**
@@ -1111,7 +1226,7 @@ static int smack_task_setnice(struct task_struct *p, int nice)
rc = cap_task_setnice(p, nice);
if (rc == 0)
- rc = smk_curacc(task_security(p), MAY_WRITE);
+ rc = smk_curacc_on_task(p, MAY_WRITE);
return rc;
}
@@ -1128,7 +1243,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio)
rc = cap_task_setioprio(p, ioprio);
if (rc == 0)
- rc = smk_curacc(task_security(p), MAY_WRITE);
+ rc = smk_curacc_on_task(p, MAY_WRITE);
return rc;
}
@@ -1140,7 +1255,7 @@ static int smack_task_setioprio(struct task_struct *p, int ioprio)
*/
static int smack_task_getioprio(struct task_struct *p)
{
- return smk_curacc(task_security(p), MAY_READ);
+ return smk_curacc_on_task(p, MAY_READ);
}
/**
@@ -1158,7 +1273,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy,
rc = cap_task_setscheduler(p, policy, lp);
if (rc == 0)
- rc = smk_curacc(task_security(p), MAY_WRITE);
+ rc = smk_curacc_on_task(p, MAY_WRITE);
return rc;
}
@@ -1170,7 +1285,7 @@ static int smack_task_setscheduler(struct task_struct *p, int policy,
*/
static int smack_task_getscheduler(struct task_struct *p)
{
- return smk_curacc(task_security(p), MAY_READ);
+ return smk_curacc_on_task(p, MAY_READ);
}
/**
@@ -1181,7 +1296,7 @@ static int smack_task_getscheduler(struct task_struct *p)
*/
static int smack_task_movememory(struct task_struct *p)
{
- return smk_curacc(task_security(p), MAY_WRITE);
+ return smk_curacc_on_task(p, MAY_WRITE);
}
/**
@@ -1199,18 +1314,23 @@ static int smack_task_movememory(struct task_struct *p)
static int smack_task_kill(struct task_struct *p, struct siginfo *info,
int sig, u32 secid)
{
+ struct smk_audit_info ad;
+
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
+ smk_ad_setfield_u_tsk(&ad, p);
/*
* Sending a signal requires that the sender
* can write the receiver.
*/
if (secid == 0)
- return smk_curacc(task_security(p), MAY_WRITE);
+ return smk_curacc(task_security(p), MAY_WRITE, &ad);
/*
* If the secid isn't 0 we're dealing with some USB IO
* specific behavior. This is not clean. For one thing
* we can't take privilege into account.
*/
- return smk_access(smack_from_secid(secid), task_security(p), MAY_WRITE);
+ return smk_access(smack_from_secid(secid), task_security(p),
+ MAY_WRITE, &ad);
}
/**
@@ -1221,11 +1341,15 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info,
*/
static int smack_task_wait(struct task_struct *p)
{
+ struct smk_audit_info ad;
+ char *sp = current_security();
+ char *tsp = task_security(p);
int rc;
- rc = smk_access(current_security(), task_security(p), MAY_WRITE);
+ /* we don't log here, we can be overriden */
+ rc = smk_access(sp, tsp, MAY_WRITE, NULL);
if (rc == 0)
- return 0;
+ goto out_log;
/*
* Allow the operation to succeed if either task
@@ -1239,8 +1363,12 @@ static int smack_task_wait(struct task_struct *p)
* the smack value.
*/
if (capable(CAP_MAC_OVERRIDE) || has_capability(p, CAP_MAC_OVERRIDE))
- return 0;
-
+ rc = 0;
+ /* we log only if we didn't get overriden */
+ out_log:
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
+ smk_ad_setfield_u_tsk(&ad, p);
+ smack_log(sp, tsp, MAY_WRITE, rc, &ad);
return rc;
}
@@ -1456,12 +1584,19 @@ static int smack_netlabel_send(struct sock *sk, struct sockaddr_in *sap)
int sk_lbl;
char *hostsp;
struct socket_smack *ssp = sk->sk_security;
+ struct smk_audit_info ad;
rcu_read_lock();
hostsp = smack_host_label(sap);
if (hostsp != NULL) {
sk_lbl = SMACK_UNLABELED_SOCKET;
- rc = smk_access(ssp->smk_out, hostsp, MAY_WRITE);
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
+ ad.a.u.net.family = sap->sin_family;
+ ad.a.u.net.dport = sap->sin_port;
+ ad.a.u.net.v4info.daddr = sap->sin_addr.s_addr;
+#endif
+ rc = smk_access(ssp->smk_out, hostsp, MAY_WRITE, &ad);
} else {
sk_lbl = SMACK_CIPSO_SOCKET;
rc = 0;
@@ -1657,6 +1792,25 @@ static void smack_shm_free_security(struct shmid_kernel *shp)
}
/**
+ * smk_curacc_shm : check if current has access on shm
+ * @shp : the object
+ * @access : access requested
+ *
+ * Returns 0 if current has the requested access, error code otherwise
+ */
+static int smk_curacc_shm(struct shmid_kernel *shp, int access)
+{
+ char *ssp = smack_of_shm(shp);
+ struct smk_audit_info ad;
+
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
+ ad.a.u.ipc_id = shp->shm_perm.id;
+#endif
+ return smk_curacc(ssp, access, &ad);
+}
+
+/**
* smack_shm_associate - Smack access check for shm
* @shp: the object
* @shmflg: access requested
@@ -1665,11 +1819,10 @@ static void smack_shm_free_security(struct shmid_kernel *shp)
*/
static int smack_shm_associate(struct shmid_kernel *shp, int shmflg)
{
- char *ssp = smack_of_shm(shp);
int may;
may = smack_flags_to_may(shmflg);
- return smk_curacc(ssp, may);
+ return smk_curacc_shm(shp, may);
}
/**
@@ -1681,7 +1834,6 @@ static int smack_shm_associate(struct shmid_kernel *shp, int shmflg)
*/
static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd)
{
- char *ssp;
int may;
switch (cmd) {
@@ -1704,9 +1856,7 @@ static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd)
default:
return -EINVAL;
}
-
- ssp = smack_of_shm(shp);
- return smk_curacc(ssp, may);
+ return smk_curacc_shm(shp, may);
}
/**
@@ -1720,11 +1870,10 @@ static int smack_shm_shmctl(struct shmid_kernel *shp, int cmd)
static int smack_shm_shmat(struct shmid_kernel *shp, char __user *shmaddr,
int shmflg)
{
- char *ssp = smack_of_shm(shp);
int may;
may = smack_flags_to_may(shmflg);
- return smk_curacc(ssp, may);
+ return smk_curacc_shm(shp, may);
}
/**
@@ -1766,6 +1915,25 @@ static void smack_sem_free_security(struct sem_array *sma)
}
/**
+ * smk_curacc_sem : check if current has access on sem
+ * @sma : the object
+ * @access : access requested
+ *
+ * Returns 0 if current has the requested access, error code otherwise
+ */
+static int smk_curacc_sem(struct sem_array *sma, int access)
+{
+ char *ssp = smack_of_sem(sma);
+ struct smk_audit_info ad;
+
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
+ ad.a.u.ipc_id = sma->sem_perm.id;
+#endif
+ return smk_curacc(ssp, access, &ad);
+}
+
+/**
* smack_sem_associate - Smack access check for sem
* @sma: the object
* @semflg: access requested
@@ -1774,11 +1942,10 @@ static void smack_sem_free_security(struct sem_array *sma)
*/
static int smack_sem_associate(struct sem_array *sma, int semflg)
{
- char *ssp = smack_of_sem(sma);
int may;
may = smack_flags_to_may(semflg);
- return smk_curacc(ssp, may);
+ return smk_curacc_sem(sma, may);
}
/**
@@ -1790,7 +1957,6 @@ static int smack_sem_associate(struct sem_array *sma, int semflg)
*/
static int smack_sem_semctl(struct sem_array *sma, int cmd)
{
- char *ssp;
int may;
switch (cmd) {
@@ -1819,8 +1985,7 @@ static int smack_sem_semctl(struct sem_array *sma, int cmd)
return -EINVAL;
}
- ssp = smack_of_sem(sma);
- return smk_curacc(ssp, may);
+ return smk_curacc_sem(sma, may);
}
/**
@@ -1837,9 +2002,7 @@ static int smack_sem_semctl(struct sem_array *sma, int cmd)
static int smack_sem_semop(struct sem_array *sma, struct sembuf *sops,
unsigned nsops, int alter)
{
- char *ssp = smack_of_sem(sma);
-
- return smk_curacc(ssp, MAY_READWRITE);
+ return smk_curacc_sem(sma, MAY_READWRITE);
}
/**
@@ -1881,6 +2044,25 @@ static char *smack_of_msq(struct msg_queue *msq)
}
/**
+ * smk_curacc_msq : helper to check if current has access on msq
+ * @msq : the msq
+ * @access : access requested
+ *
+ * return 0 if current has access, error otherwise
+ */
+static int smk_curacc_msq(struct msg_queue *msq, int access)
+{
+ char *msp = smack_of_msq(msq);
+ struct smk_audit_info ad;
+
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
+ ad.a.u.ipc_id = msq->q_perm.id;
+#endif
+ return smk_curacc(msp, access, &ad);
+}
+
+/**
* smack_msg_queue_associate - Smack access check for msg_queue
* @msq: the object
* @msqflg: access requested
@@ -1889,11 +2071,10 @@ static char *smack_of_msq(struct msg_queue *msq)
*/
static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg)
{
- char *msp = smack_of_msq(msq);
int may;
may = smack_flags_to_may(msqflg);
- return smk_curacc(msp, may);
+ return smk_curacc_msq(msq, may);
}
/**
@@ -1905,7 +2086,6 @@ static int smack_msg_queue_associate(struct msg_queue *msq, int msqflg)
*/
static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
{
- char *msp;
int may;
switch (cmd) {
@@ -1927,8 +2107,7 @@ static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
return -EINVAL;
}
- msp = smack_of_msq(msq);
- return smk_curacc(msp, may);
+ return smk_curacc_msq(msq, may);
}
/**
@@ -1942,11 +2121,10 @@ static int smack_msg_queue_msgctl(struct msg_queue *msq, int cmd)
static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
int msqflg)
{
- char *msp = smack_of_msq(msq);
- int rc;
+ int may;
- rc = smack_flags_to_may(msqflg);
- return smk_curacc(msp, rc);
+ may = smack_flags_to_may(msqflg);
+ return smk_curacc_msq(msq, may);
}
/**
@@ -1962,9 +2140,7 @@ static int smack_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg,
static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
struct task_struct *target, long type, int mode)
{
- char *msp = smack_of_msq(msq);
-
- return smk_curacc(msp, MAY_READWRITE);
+ return smk_curacc_msq(msq, MAY_READWRITE);
}
/**
@@ -1977,10 +2153,14 @@ static int smack_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
static int smack_ipc_permission(struct kern_ipc_perm *ipp, short flag)
{
char *isp = ipp->security;
- int may;
+ int may = smack_flags_to_may(flag);
+ struct smk_audit_info ad;
- may = smack_flags_to_may(flag);
- return smk_curacc(isp, may);
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_IPC);
+ ad.a.u.ipc_id = ipp->id;
+#endif
+ return smk_curacc(isp, may, &ad);
}
/**
@@ -2239,8 +2419,12 @@ static int smack_unix_stream_connect(struct socket *sock,
{
struct inode *sp = SOCK_INODE(sock);
struct inode *op = SOCK_INODE(other);
+ struct smk_audit_info ad;
- return smk_access(smk_of_inode(sp), smk_of_inode(op), MAY_READWRITE);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
+ smk_ad_setfield_u_net_sk(&ad, other->sk);
+ return smk_access(smk_of_inode(sp), smk_of_inode(op),
+ MAY_READWRITE, &ad);
}
/**
@@ -2255,8 +2439,11 @@ static int smack_unix_may_send(struct socket *sock, struct socket *other)
{
struct inode *sp = SOCK_INODE(sock);
struct inode *op = SOCK_INODE(other);
+ struct smk_audit_info ad;
- return smk_access(smk_of_inode(sp), smk_of_inode(op), MAY_WRITE);
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
+ smk_ad_setfield_u_net_sk(&ad, other->sk);
+ return smk_access(smk_of_inode(sp), smk_of_inode(op), MAY_WRITE, &ad);
}
/**
@@ -2371,7 +2558,7 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
char smack[SMK_LABELLEN];
char *csp;
int rc;
-
+ struct smk_audit_info ad;
if (sk->sk_family != PF_INET && sk->sk_family != PF_INET6)
return 0;
@@ -2389,13 +2576,19 @@ static int smack_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
netlbl_secattr_destroy(&secattr);
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
+ ad.a.u.net.family = sk->sk_family;
+ ad.a.u.net.netif = skb->iif;
+ ipv4_skb_to_auditdata(skb, &ad.a, NULL);
+#endif
/*
* Receiving a packet requires that the other end
* be able to write here. Read access is not required.
* This is the simplist possible security model
* for networking.
*/
- rc = smk_access(csp, ssp->smk_in, MAY_WRITE);
+ rc = smk_access(csp, ssp->smk_in, MAY_WRITE, &ad);
if (rc != 0)
netlbl_skbuff_err(skb, rc, 0);
return rc;
@@ -2524,6 +2717,7 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
struct iphdr *hdr;
char smack[SMK_LABELLEN];
int rc;
+ struct smk_audit_info ad;
/* handle mapped IPv4 packets arriving via IPv6 sockets */
if (family == PF_INET6 && skb->protocol == htons(ETH_P_IP))
@@ -2537,11 +2731,17 @@ static int smack_inet_conn_request(struct sock *sk, struct sk_buff *skb,
strncpy(smack, smack_known_huh.smk_known, SMK_MAXLEN);
netlbl_secattr_destroy(&secattr);
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_NET);
+ ad.a.u.net.family = family;
+ ad.a.u.net.netif = skb->iif;
+ ipv4_skb_to_auditdata(skb, &ad.a, NULL);
+#endif
/*
* Receiving a packet requires that the other end be able to write
* here. Read access is not required.
*/
- rc = smk_access(smack, ssp->smk_in, MAY_WRITE);
+ rc = smk_access(smack, ssp->smk_in, MAY_WRITE, &ad);
if (rc != 0)
return rc;
@@ -2643,6 +2843,7 @@ static int smack_key_permission(key_ref_t key_ref,
const struct cred *cred, key_perm_t perm)
{
struct key *keyp;
+ struct smk_audit_info ad;
keyp = key_ref_to_ptr(key_ref);
if (keyp == NULL)
@@ -2658,8 +2859,13 @@ static int smack_key_permission(key_ref_t key_ref,
*/
if (cred->security == NULL)
return -EACCES;
-
- return smk_access(cred->security, keyp->security, MAY_READWRITE);
+#ifdef CONFIG_AUDIT
+ smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_KEY);
+ ad.a.u.key_struct.key = keyp->serial;
+ ad.a.u.key_struct.key_desc = keyp->description;
+#endif
+ return smk_access(cred->security, keyp->security,
+ MAY_READWRITE, &ad);
}
#endif /* CONFIG_KEYS */
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index e03a7e1..904af34 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -41,6 +41,7 @@ enum smk_inos {
SMK_AMBIENT = 7, /* internet ambient label */
SMK_NETLBLADDR = 8, /* single label hosts */
SMK_ONLYCAP = 9, /* the only "capable" label */
+ SMK_LOGGING = 10, /* logging */
};
/*
@@ -1192,6 +1193,69 @@ static const struct file_operations smk_onlycap_ops = {
};
/**
+ * smk_read_logging - read() for /smack/logging
+ * @filp: file pointer, not actually used
+ * @buf: where to put the result
+ * @cn: maximum to send along
+ * @ppos: where to start
+ *
+ * Returns number of bytes read or error code, as appropriate
+ */
+static ssize_t smk_read_logging(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char temp[32];
+ ssize_t rc;
+
+ if (*ppos != 0)
+ return 0;
+
+ sprintf(temp, "%d\n", log_policy);
+ rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
+ return rc;
+}
+
+/**
+ * smk_write_logging - write() for /smack/logging
+ * @file: file pointer, not actually used
+ * @buf: where to get the data from
+ * @count: bytes sent
+ * @ppos: where to start
+ *
+ * Returns number of bytes written or error code, as appropriate
+ */
+static ssize_t smk_write_logging(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char temp[32];
+ int i;
+
+ if (!capable(CAP_MAC_ADMIN))
+ return -EPERM;
+
+ if (count >= sizeof(temp) || count == 0)
+ return -EINVAL;
+
+ if (copy_from_user(temp, buf, count) != 0)
+ return -EFAULT;
+
+ temp[count] = '\0';
+
+ if (sscanf(temp, "%d", &i) != 1)
+ return -EINVAL;
+ if (i < 0 || i > 3)
+ return -EINVAL;
+ log_policy = i;
+ return count;
+}
+
+
+
+static const struct file_operations smk_logging_ops = {
+ .read = smk_read_logging,
+ .write = smk_write_logging,
+};
+/**
* smk_fill_super - fill the /smackfs superblock
* @sb: the empty superblock
* @data: unused
@@ -1221,6 +1285,8 @@ static int smk_fill_super(struct super_block *sb, void *data, int silent)
{"netlabel", &smk_netlbladdr_ops, S_IRUGO|S_IWUSR},
[SMK_ONLYCAP] =
{"onlycap", &smk_onlycap_ops, S_IRUGO|S_IWUSR},
+ [SMK_LOGGING] =
+ {"logging", &smk_logging_ops, S_IRUGO|S_IWUSR},
/* last one */ {""}
};
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