1 files changed, 311 insertions, 337 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index 073fd5b0a53a..8bae68e21af9 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -141,19 +141,24 @@ static ssize_t sel_write_enforce(struct file *file, const char __user *buf,
                                  size_t count, loff_t *ppos)
 
 {
-        char *page;
+        char *page = NULL;
         ssize_t length;
         int new_value;
 
+        length = -ENOMEM;
         if (count >= PAGE_SIZE)
-                return -ENOMEM;
-        if (*ppos != 0) {
-                /* No partial writes. */
-                return -EINVAL;
-        }
+                goto out;
+
+        /* No partial writes. */
+        length = EINVAL;
+        if (*ppos != 0)
+                goto out;
+
+        length = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
         if (!page)
-                return -ENOMEM;
+                goto out;
+
         length = -EFAULT;
         if (copy_from_user(page, buf, count))
                 goto out;
@@ -268,20 +273,25 @@ static ssize_t sel_write_disable(struct file *file, const char __user *buf,
                                  size_t count, loff_t *ppos)
 
 {
-        char *page;
+        char *page = NULL;
         ssize_t length;
         int new_value;
         extern int selinux_disable(void);
 
+        length = -ENOMEM;
         if (count >= PAGE_SIZE)
-                return -ENOMEM;
-        if (*ppos != 0) {
-                /* No partial writes. */
-                return -EINVAL;
-        }
+                goto out;;
+
+        /* No partial writes. */
+        length = -EINVAL;
+        if (*ppos != 0)
+                goto out;
+
+        length = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
         if (!page)
-                return -ENOMEM;
+                goto out;
+
         length = -EFAULT;
         if (copy_from_user(page, buf, count))
                 goto out;
@@ -292,7 +302,7 @@ static ssize_t sel_write_disable(struct file *file, const char __user *buf,
 
         if (new_value) {
                 length = selinux_disable();
-                if (length < 0)
+                if (length)
                         goto out;
                 audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS,
                         "selinux=0 auid=%u ses=%u",
@@ -493,7 +503,6 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
                               size_t count, loff_t *ppos)
 
 {
-        int ret;
         ssize_t length;
         void *data = NULL;
 
@@ -503,17 +512,19 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
         if (length)
                 goto out;
 
-        if (*ppos != 0) {
-                /* No partial writes. */
-                length = -EINVAL;
+        /* No partial writes. */
+        length = -EINVAL;
+        if (*ppos != 0)
                 goto out;
-        }
 
-        if ((count > 64 * 1024 * 1024)
-            || (data = vmalloc(count)) == NULL) {
-                length = -ENOMEM;
+        length = -EFBIG;
+        if (count > 64 * 1024 * 1024)
+                goto out;
+
+        length = -ENOMEM;
+        data = vmalloc(count);
+        if (!data)
                 goto out;
-        }
 
         length = -EFAULT;
         if (copy_from_user(data, buf, count) != 0)
@@ -523,23 +534,19 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
         if (length)
                 goto out;
 
-        ret = sel_make_bools();
-        if (ret) {
-                length = ret;
+        length = sel_make_bools();
+        if (length)
                 goto out1;
-        }
 
-        ret = sel_make_classes();
-        if (ret) {
-                length = ret;
+        length = sel_make_classes();
+        if (length)
                 goto out1;
-        }
 
-        ret = sel_make_policycap();
-        if (ret)
-                length = ret;
-        else
-                length = count;
+        length = sel_make_policycap();
+        if (length)
+                goto out1;
+
+        length = count;
 
 out1:
         audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD,
@@ -559,26 +566,26 @@ static const struct file_operations sel_load_ops = {
 
 static ssize_t sel_write_context(struct file *file, char *buf, size_t size)
 {
-        char *canon;
+        char *canon = NULL;
         u32 sid, len;
         ssize_t length;
 
         length = task_has_security(current, SECURITY__CHECK_CONTEXT);
         if (length)
-                return length;
+                goto out;
 
         length = security_context_to_sid(buf, size, &sid);
-        if (length < 0)
-                return length;
+        if (length)
+                goto out;
 
         length = security_sid_to_context(sid, &canon, &len);
-        if (length < 0)
-                return length;
+        if (length)
+                goto out;
 
+        length = -ERANGE;
         if (len > SIMPLE_TRANSACTION_LIMIT) {
                 printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
                         "payload max\n", __func__, len);
-                length = -ERANGE;
                 goto out;
         }
 
@@ -602,23 +609,28 @@ static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf,
 static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf,
                                       size_t count, loff_t *ppos)
 {
-        char *page;
+        char *page = NULL;
         ssize_t length;
         unsigned int new_value;
 
         length = task_has_security(current, SECURITY__SETCHECKREQPROT);
         if (length)
-                return length;
+                goto out;
 
+        length = -ENOMEM;
         if (count >= PAGE_SIZE)
-                return -ENOMEM;
-        if (*ppos != 0) {
-                /* No partial writes. */
-                return -EINVAL;
-        }
+                goto out;
+
+        /* No partial writes. */
+        length = -EINVAL;
+        if (*ppos != 0)
+                goto out;
+
+        length = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
         if (!page)
-                return -ENOMEM;
+                goto out;
+
         length = -EFAULT;
         if (copy_from_user(page, buf, count))
                 goto out;
@@ -693,7 +705,7 @@ static const struct file_operations transaction_ops = {
 
 static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
 {
-        char *scon, *tcon;
+        char *scon = NULL, *tcon = NULL;
         u32 ssid, tsid;
         u16 tclass;
         struct av_decision avd;
@@ -701,27 +713,29 @@ static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
 
         length = task_has_security(current, SECURITY__COMPUTE_AV);
         if (length)
-                return length;
+                goto out;
 
         length = -ENOMEM;
         scon = kzalloc(size + 1, GFP_KERNEL);
         if (!scon)
-                return length;
+                goto out;
 
+        length = -ENOMEM;
         tcon = kzalloc(size + 1, GFP_KERNEL);
         if (!tcon)
                 goto out;
 
         length = -EINVAL;
         if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
-                goto out2;
+                goto out;
 
         length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
+
         length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         security_compute_av_user(ssid, tsid, tclass, &avd);
 
@@ -730,133 +744,131 @@ static ssize_t sel_write_access(struct file *file, char *buf, size_t size)
                           avd.allowed, 0xffffffff,
                           avd.auditallow, avd.auditdeny,
                           avd.seqno, avd.flags);
-out2:
-        kfree(tcon);
 out:
+        kfree(tcon);
         kfree(scon);
         return length;
 }
 
 static ssize_t sel_write_create(struct file *file, char *buf, size_t size)
 {
-        char *scon, *tcon;
+        char *scon = NULL, *tcon = NULL;
         u32 ssid, tsid, newsid;
         u16 tclass;
         ssize_t length;
-        char *newcon;
+        char *newcon = NULL;
         u32 len;
 
         length = task_has_security(current, SECURITY__COMPUTE_CREATE);
         if (length)
-                return length;
+                goto out;
 
         length = -ENOMEM;
         scon = kzalloc(size + 1, GFP_KERNEL);
         if (!scon)
-                return length;
+                goto out;
 
+        length = -ENOMEM;
         tcon = kzalloc(size + 1, GFP_KERNEL);
         if (!tcon)
                 goto out;
 
         length = -EINVAL;
         if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
-                goto out2;
+                goto out;
 
         length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
+
         length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = security_transition_sid_user(ssid, tsid, tclass, &newsid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = security_sid_to_context(newsid, &newcon, &len);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
+        length = -ERANGE;
         if (len > SIMPLE_TRANSACTION_LIMIT) {
                 printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
                         "payload max\n", __func__, len);
-                length = -ERANGE;
-                goto out3;
+                goto out;
         }
 
         memcpy(buf, newcon, len);
         length = len;
-out3:
+out:
         kfree(newcon);
-out2:
         kfree(tcon);
-out:
         kfree(scon);
         return length;
 }
 
 static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size)
 {
-        char *scon, *tcon;
+        char *scon = NULL, *tcon = NULL;
         u32 ssid, tsid, newsid;
         u16 tclass;
         ssize_t length;
-        char *newcon;
+        char *newcon = NULL;
         u32 len;
 
         length = task_has_security(current, SECURITY__COMPUTE_RELABEL);
         if (length)
-                return length;
+                goto out;
 
         length = -ENOMEM;
         scon = kzalloc(size + 1, GFP_KERNEL);
         if (!scon)
-                return length;
+                goto out;
 
+        length = -ENOMEM;
         tcon = kzalloc(size + 1, GFP_KERNEL);
         if (!tcon)
                 goto out;
 
         length = -EINVAL;
         if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
-                goto out2;
+                goto out;
 
         length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
+
         length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = security_change_sid(ssid, tsid, tclass, &newsid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = security_sid_to_context(newsid, &newcon, &len);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
-        if (len > SIMPLE_TRANSACTION_LIMIT) {
-                length = -ERANGE;
-                goto out3;
-        }
+        length = -ERANGE;
+        if (len > SIMPLE_TRANSACTION_LIMIT)
+                goto out;
 
         memcpy(buf, newcon, len);
         length = len;
-out3:
+out:
         kfree(newcon);
-out2:
         kfree(tcon);
-out:
         kfree(scon);
         return length;
 }
 
 static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
 {
-        char *con, *user, *ptr;
-        u32 sid, *sids;
+        char *con = NULL, *user = NULL, *ptr;
+        u32 sid, *sids = NULL;
         ssize_t length;
         char *newcon;
         int i, rc;
@@ -864,28 +876,29 @@ static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
 
         length = task_has_security(current, SECURITY__COMPUTE_USER);
         if (length)
-                return length;
+                goto out;;
 
         length = -ENOMEM;
         con = kzalloc(size + 1, GFP_KERNEL);
         if (!con)
-                return length;
+                goto out;;
 
+        length = -ENOMEM;
         user = kzalloc(size + 1, GFP_KERNEL);
         if (!user)
                 goto out;
 
         length = -EINVAL;
         if (sscanf(buf, "%s %s", con, user) != 2)
-                goto out2;
+                goto out;
 
         length = security_context_to_sid(con, strlen(con) + 1, &sid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = security_get_user_sids(sid, user, &sids, &nsids);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = sprintf(buf, "%u", nsids) + 1;
         ptr = buf + length;
@@ -893,82 +906,80 @@ static ssize_t sel_write_user(struct file *file, char *buf, size_t size)
                 rc = security_sid_to_context(sids[i], &newcon, &len);
                 if (rc) {
                         length = rc;
-                        goto out3;
+                        goto out;
                 }
                 if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) {
                         kfree(newcon);
                         length = -ERANGE;
-                        goto out3;
+                        goto out;
                 }
                 memcpy(ptr, newcon, len);
                 kfree(newcon);
                 ptr += len;
                 length += len;
         }
-out3:
+out:
         kfree(sids);
-out2:
         kfree(user);
-out:
         kfree(con);
         return length;
 }
 
 static ssize_t sel_write_member(struct file *file, char *buf, size_t size)
 {
-        char *scon, *tcon;
+        char *scon = NULL, *tcon = NULL;
         u32 ssid, tsid, newsid;
         u16 tclass;
         ssize_t length;
-        char *newcon;
+        char *newcon = NULL;
         u32 len;
 
         length = task_has_security(current, SECURITY__COMPUTE_MEMBER);
         if (length)
-                return length;
+                goto out;
 
         length = -ENOMEM;
         scon = kzalloc(size + 1, GFP_KERNEL);
         if (!scon)
-                return length;
+                goto out;;
 
+        length = -ENOMEM;
         tcon = kzalloc(size + 1, GFP_KERNEL);
         if (!tcon)
                 goto out;
 
         length = -EINVAL;
         if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3)
-                goto out2;
+                goto out;
 
         length = security_context_to_sid(scon, strlen(scon) + 1, &ssid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
+
         length = security_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = security_member_sid(ssid, tsid, tclass, &newsid);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
         length = security_sid_to_context(newsid, &newcon, &len);
-        if (length < 0)
-                goto out2;
+        if (length)
+                goto out;
 
+        length = -ERANGE;
         if (len > SIMPLE_TRANSACTION_LIMIT) {
                 printk(KERN_ERR "SELinux: %s:  context size (%u) exceeds "
                         "payload max\n", __func__, len);
-                length = -ERANGE;
-                goto out3;
+                goto out;
         }
 
         memcpy(buf, newcon, len);
         length = len;
-out3:
+out:
         kfree(newcon);
-out2:
         kfree(tcon);
-out:
         kfree(scon);
         return length;
 }
@@ -998,16 +1009,14 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
 
         mutex_lock(&sel_mutex);
 
-        if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
-                ret = -EINVAL;
+        ret = -EINVAL;
+        if (index >= bool_num || strcmp(name, bool_pending_names[index]))
                 goto out;
-        }
 
+        ret = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
-        if (!page) {
-                ret = -ENOMEM;
+        if (!page)
                 goto out;
-        }
 
         cur_enforcing = security_get_bool_value(index);
         if (cur_enforcing < 0) {
@@ -1019,8 +1028,7 @@ static ssize_t sel_read_bool(struct file *filep, char __user *buf,
         ret = simple_read_from_buffer(buf, count, ppos, page, length);
 out:
         mutex_unlock(&sel_mutex);
-        if (page)
-                free_page((unsigned long)page);
+        free_page((unsigned long)page);
         return ret;
 }
 
@@ -1040,26 +1048,23 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
         if (length)
                 goto out;
 
-        if (index >= bool_num || strcmp(name, bool_pending_names[index])) {
-                length = -EINVAL;
+        length = -EINVAL;
+        if (index >= bool_num || strcmp(name, bool_pending_names[index]))
                 goto out;
-        }
 
-        if (count >= PAGE_SIZE) {
-                length = -ENOMEM;
+        length = -ENOMEM;
+        if (count >= PAGE_SIZE)
                 goto out;
-        }
 
-        if (*ppos != 0) {
-                /* No partial writes. */
-                length = -EINVAL;
+        /* No partial writes. */
+        length = -EINVAL;
+        if (*ppos != 0)
                 goto out;
-        }
+
+        length = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
-        if (!page) {
-                length = -ENOMEM;
+        if (!page)
                 goto out;
-        }
 
         length = -EFAULT;
         if (copy_from_user(page, buf, count))
@@ -1077,8 +1082,7 @@ static ssize_t sel_write_bool(struct file *filep, const char __user *buf,
 
 out:
         mutex_unlock(&sel_mutex);
-        if (page)
-                free_page((unsigned long) page);
+        free_page((unsigned long) page);
         return length;
 }
 
@@ -1102,19 +1106,19 @@ static ssize_t sel_commit_bools_write(struct file *filep,
         if (length)
                 goto out;
 
-        if (count >= PAGE_SIZE) {
-                length = -ENOMEM;
+        length = -ENOMEM;
+        if (count >= PAGE_SIZE)
                 goto out;
-        }
-        if (*ppos != 0) {
-                /* No partial writes. */
+
+        /* No partial writes. */
+        length = -EINVAL;
+        if (*ppos != 0)
                 goto out;
-        }
+
+        length = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
-        if (!page) {
-                length = -ENOMEM;
+        if (!page)
                 goto out;
-        }
 
         length = -EFAULT;
         if (copy_from_user(page, buf, count))
@@ -1124,15 +1128,16 @@ static ssize_t sel_commit_bools_write(struct file *filep,
         if (sscanf(page, "%d", &new_value) != 1)
                 goto out;
 
+        length = 0;
         if (new_value && bool_pending_values)
-                security_set_bools(bool_num, bool_pending_values);
+                length = security_set_bools(bool_num, bool_pending_values);
 
-        length = count;
+        if (!length)
+                length = count;
 
 out:
         mutex_unlock(&sel_mutex);
-        if (page)
-                free_page((unsigned long) page);
+        free_page((unsigned long) page);
         return length;
 }
 
@@ -1169,7 +1174,7 @@ static void sel_remove_entries(struct dentry *de)
 
 static int sel_make_bools(void)
 {
-        int i, ret = 0;
+        int i, ret;
         ssize_t len;
         struct dentry *dentry = NULL;
         struct dentry *dir = bool_dir;
@@ -1190,38 +1195,40 @@ static int sel_make_bools(void)
 
         sel_remove_entries(dir);
 
+        ret = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
         if (!page)
-                return -ENOMEM;
+                goto out;
 
         ret = security_get_bools(&num, &names, &values);
-        if (ret != 0)
+        if (ret)
                 goto out;
 
         for (i = 0; i < num; i++) {
+                ret = -ENOMEM;
                 dentry = d_alloc_name(dir, names[i]);
-                if (!dentry) {
-                        ret = -ENOMEM;
-                        goto err;
-                }
+                if (!dentry)
+                        goto out;
+
+                ret = -ENOMEM;
                 inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR);
-                if (!inode) {
-                        ret = -ENOMEM;
-                        goto err;
-                }
+                if (!inode)
+                        goto out;
 
+                ret = -EINVAL;
                 len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]);
-                if (len < 0) {
-                        ret = -EINVAL;
-                        goto err;
-                } else if (len >= PAGE_SIZE) {
-                        ret = -ENAMETOOLONG;
-                        goto err;
-                }
+                if (len < 0)
+                        goto out;
+
+                ret = -ENAMETOOLONG;
+                if (len >= PAGE_SIZE)
+                        goto out;
+
                 isec = (struct inode_security_struct *)inode->i_security;
                 ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid);
                 if (ret)
-                        goto err;
+                        goto out;
+
                 isec->sid = sid;
                 isec->initialized = 1;
                 inode->i_fop = &sel_bool_ops;
@@ -1231,10 +1238,12 @@ static int sel_make_bools(void)
         bool_num = num;
         bool_pending_names = names;
         bool_pending_values = values;
+
+        free_page((unsigned long)page);
+        return 0;
 out:
         free_page((unsigned long)page);
-        return ret;
-err:
+
         if (names) {
                 for (i = 0; i < num; i++)
                         kfree(names[i]);
@@ -1242,8 +1251,8 @@ err:
         }
         kfree(values);
         sel_remove_entries(dir);
-        ret = -ENOMEM;
-        goto out;
+
+        return ret;
 }
 
 #define NULL_FILE_NAME "null"
@@ -1265,47 +1274,41 @@ static ssize_t sel_write_avc_cache_threshold(struct file *file,
                                              size_t count, loff_t *ppos)
 
 {
-        char *page;
+        char *page = NULL;
         ssize_t ret;
         int new_value;
 
-        if (count >= PAGE_SIZE) {
-                ret = -ENOMEM;
+        ret = task_has_security(current, SECURITY__SETSECPARAM);
+        if (ret)
                 goto out;
-        }
 
-        if (*ppos != 0) {
-                /* No partial writes. */
-                ret = -EINVAL;
+        ret = -ENOMEM;
+        if (count >= PAGE_SIZE)
                 goto out;
-        }
 
+        /* No partial writes. */
+        ret = -EINVAL;
+        if (*ppos != 0)
+                goto out;
+
+        ret = -ENOMEM;
         page = (char *)get_zeroed_page(GFP_KERNEL);
-        if (!page) {
-                ret = -ENOMEM;
+        if (!page)
                 goto out;
-        }
 
-        if (copy_from_user(page, buf, count)) {
-                ret = -EFAULT;
-                goto out_free;
-        }
+        ret = -EFAULT;
+        if (copy_from_user(page, buf, count))
+                goto out;
 
-        if (sscanf(page, "%u", &new_value) != 1) {
-                ret = -EINVAL;
+        ret = -EINVAL;
+        if (sscanf(page, "%u", &new_value) != 1)
                 goto out;
-        }
 
-        if (new_value != avc_cache_threshold) {
-                ret = task_has_security(current, SECURITY__SETSECPARAM);
-                if (ret)
-                        goto out_free;
-                avc_cache_threshold = new_value;
-        }
+        avc_cache_threshold = new_value;
+
         ret = count;
-out_free:
-        free_page((unsigned long)page);
 out:
+        free_page((unsigned long)page);
         return ret;
 }
 
@@ -1313,19 +1316,18 @@ static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf,
                                        size_t count, loff_t *ppos)
 {
         char *page;
-        ssize_t ret = 0;
+        ssize_t length;
 
         page = (char *)__get_free_page(GFP_KERNEL);
-        if (!page) {
-                ret = -ENOMEM;
-                goto out;
-        }
-        ret = avc_get_hash_stats(page);
-        if (ret >= 0)
-                ret = simple_read_from_buffer(buf, count, ppos, page, ret);
+        if (!page)
+                return -ENOMEM;
+
+        length = avc_get_hash_stats(page);
+        if (length >= 0)
+                length = simple_read_from_buffer(buf, count, ppos, page, length);
         free_page((unsigned long)page);
-out:
-        return ret;
+
+        return length;
 }
 
 static const struct file_operations sel_avc_cache_threshold_ops = {
@@ -1407,7 +1409,7 @@ static const struct file_operations sel_avc_cache_stats_ops = {
 
 static int sel_make_avc_files(struct dentry *dir)
 {
-        int i, ret = 0;
+        int i;
         static struct tree_descr files[] = {
                 { "cache_threshold",
                   &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR },
@@ -1422,22 +1424,19 @@ static int sel_make_avc_files(struct dentry *dir)
                 struct dentry *dentry;
 
                 dentry = d_alloc_name(dir, files[i].name);
-                if (!dentry) {
-                        ret = -ENOMEM;
-                        goto out;
-                }
+                if (!dentry)
+                        return -ENOMEM;
 
                 inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode);
-                if (!inode) {
-                        ret = -ENOMEM;
-                        goto out;
-                }
+                if (!inode)
+                        return -ENOMEM;
+
                 inode->i_fop = files[i].ops;
                 inode->i_ino = ++sel_last_ino;
                 d_add(dentry, inode);
         }
-out:
-        return ret;
+
+        return 0;
 }
 
 static ssize_t sel_read_initcon(struct file *file, char __user *buf,
@@ -1451,7 +1450,7 @@ static ssize_t sel_read_initcon(struct file *file, char __user *buf,
         inode = file->f_path.dentry->d_inode;
         sid = inode->i_ino&SEL_INO_MASK;
         ret = security_sid_to_context(sid, &con, &len);
-        if (ret < 0)
+        if (ret)
                 return ret;
 
         ret = simple_read_from_buffer(buf, count, ppos, con, len);
@@ -1466,28 +1465,25 @@ static const struct file_operations sel_initcon_ops = {
 
 static int sel_make_initcon_files(struct dentry *dir)
 {
-        int i, ret = 0;
+        int i;
 
         for (i = 1; i <= SECINITSID_NUM; i++) {
                 struct inode *inode;
                 struct dentry *dentry;
                 dentry = d_alloc_name(dir, security_get_initial_sid_context(i));
-                if (!dentry) {
-                        ret = -ENOMEM;
-                        goto out;
-                }
+                if (!dentry)
+                        return -ENOMEM;
 
                 inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
-                if (!inode) {
-                        ret = -ENOMEM;
-                        goto out;
-                }
+                if (!inode)
+                        return -ENOMEM;
+
                 inode->i_fop = &sel_initcon_ops;
                 inode->i_ino = i|SEL_INITCON_INO_OFFSET;
                 d_add(dentry, inode);
         }
-out:
-        return ret;
+
+        return 0;
 }
 
 static inline unsigned int sel_div(unsigned long a, unsigned long b)
@@ -1523,15 +1519,13 @@ static ssize_t sel_read_class(struct file *file, char __user *buf,
         unsigned long ino = file->f_path.dentry->d_inode->i_ino;
 
         page = (char *)__get_free_page(GFP_KERNEL);
-        if (!page) {
-                rc = -ENOMEM;
-                goto out;
-        }
+        if (!page)
+                return -ENOMEM;
 
         len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_class(ino));
         rc = simple_read_from_buffer(buf, count, ppos, page, len);
         free_page((unsigned long)page);
-out:
+
         return rc;
 }
 
@@ -1548,15 +1542,13 @@ static ssize_t sel_read_perm(struct file *file, char __user *buf,
         unsigned long ino = file->f_path.dentry->d_inode->i_ino;
 
         page = (char *)__get_free_page(GFP_KERNEL);
-        if (!page) {
-                rc = -ENOMEM;
-                goto out;
-        }
+        if (!page)
+                return -ENOMEM;
 
         len = snprintf(page, PAGE_SIZE, "%d", sel_ino_to_perm(ino));
         rc = simple_read_from_buffer(buf, count, ppos, page, len);
         free_page((unsigned long)page);
-out:
+
         return rc;
 }
 
@@ -1587,39 +1579,37 @@ static const struct file_operations sel_policycap_ops = {
 static int sel_make_perm_files(char *objclass, int classvalue,
                                 struct dentry *dir)
 {
-        int i, rc = 0, nperms;
+        int i, rc, nperms;
         char **perms;
 
         rc = security_get_permissions(objclass, &perms, &nperms);
         if (rc)
-                goto out;
+                return rc;
 
         for (i = 0; i < nperms; i++) {
                 struct inode *inode;
                 struct dentry *dentry;
 
+                rc = -ENOMEM;
                 dentry = d_alloc_name(dir, perms[i]);
-                if (!dentry) {
-                        rc = -ENOMEM;
-                        goto out1;
-                }
+                if (!dentry)
+                        goto out;
 
+                rc = -ENOMEM;
                 inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
-                if (!inode) {
-                        rc = -ENOMEM;
-                        goto out1;
-                }
+                if (!inode)
+                        goto out;
+
                 inode->i_fop = &sel_perm_ops;
                 /* i+1 since perm values are 1-indexed */
                 inode->i_ino = sel_perm_to_ino(classvalue, i + 1);
                 d_add(dentry, inode);
         }
-
-out1:
+        rc = 0;
+out:
         for (i = 0; i < nperms; i++)
                 kfree(perms[i]);
         kfree(perms);
-out:
         return rc;
 }
 
@@ -1631,34 +1621,27 @@ static int sel_make_class_dir_entries(char *classname, int index,
         int rc;
 
         dentry = d_alloc_name(dir, "index");
-        if (!dentry) {
-                rc = -ENOMEM;
-                goto out;
-        }
+        if (!dentry)
+                return -ENOMEM;
 
         inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO);
-        if (!inode) {
-                rc = -ENOMEM;
-                goto out;
-        }
+        if (!inode)
+                return -ENOMEM;
 
         inode->i_fop = &sel_class_ops;
         inode->i_ino = sel_class_to_ino(index);
         d_add(dentry, inode);
 
         dentry = d_alloc_name(dir, "perms");
-        if (!dentry) {
-                rc = -ENOMEM;
-                goto out;
-        }
+        if (!dentry)
+                return -ENOMEM;
 
         rc = sel_make_dir(dir->d_inode, dentry, &last_class_ino);
         if (rc)
-                goto out;
+                return rc;
 
         rc = sel_make_perm_files(classname, index, dentry);
 
-out:
         return rc;
 }
 
@@ -1688,15 +1671,15 @@ static void sel_remove_classes(void)
 
 static int sel_make_classes(void)
 {
-        int rc = 0, nclasses, i;
+        int rc, nclasses, i;
         char **classes;
 
         /* delete any existing entries */
         sel_remove_classes();
 
         rc = security_get_classes(&classes, &nclasses);
-        if (rc < 0)
-                goto out;
+        if (rc)
+                return rc;
 
         /* +2 since classes are 1-indexed */
         last_class_ino = sel_class_to_ino(nclasses + 2);
@@ -1704,29 +1687,27 @@ static int sel_make_classes(void)
         for (i = 0; i < nclasses; i++) {
                 struct dentry *class_name_dir;
 
+                rc = -ENOMEM;
                 class_name_dir = d_alloc_name(class_dir, classes[i]);
-                if (!class_name_dir) {
-                        rc = -ENOMEM;
-                        goto out1;
-                }
+                if (!class_name_dir)
+                        goto out;
 
                 rc = sel_make_dir(class_dir->d_inode, class_name_dir,
                                 &last_class_ino);
                 if (rc)
-                        goto out1;
+                        goto out;
 
                 /* i+1 since class values are 1-indexed */
                 rc = sel_make_class_dir_entries(classes[i], i + 1,
                                 class_name_dir);
                 if (rc)
-                        goto out1;
+                        goto out;
         }
-
-out1:
+        rc = 0;
+out:
         for (i = 0; i < nclasses; i++)
                 kfree(classes[i]);
         kfree(classes);
-out:
         return rc;
 }
 
@@ -1763,14 +1744,12 @@ static int sel_make_policycap(void)
 static int sel_make_dir(struct inode *dir, struct dentry *dentry,
                         unsigned long *ino)
 {
-        int ret = 0;
         struct inode *inode;
 
         inode = sel_make_inode(dir->i_sb, S_IFDIR | S_IRUGO | S_IXUGO);
-        if (!inode) {
-                ret = -ENOMEM;
-                goto out;
-        }
+        if (!inode)
+                return -ENOMEM;
+
         inode->i_op = &simple_dir_inode_operations;
         inode->i_fop = &simple_dir_operations;
         inode->i_ino = ++(*ino);
@@ -1779,8 +1758,8 @@ static int sel_make_dir(struct inode *dir, struct dentry *dentry,
         d_add(dentry, inode);
         /* bump link count on parent directory, too */
         inc_nlink(dir);
-out:
-        return ret;
+
+        return 0;
 }
 
 static int sel_fill_super(struct super_block *sb, void *data, int silent)
@@ -1816,11 +1795,10 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
 
         root_inode = sb->s_root->d_inode;
 
+        ret = -ENOMEM;
         dentry = d_alloc_name(sb->s_root, BOOL_DIR_NAME);
-        if (!dentry) {
-                ret = -ENOMEM;
+        if (!dentry)
                 goto err;
-        }
 
         ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
         if (ret)
@@ -1828,17 +1806,16 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
 
         bool_dir = dentry;
 
+        ret = -ENOMEM;
         dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME);
-        if (!dentry) {
-                ret = -ENOMEM;
+        if (!dentry)
                 goto err;
-        }
 
+        ret = -ENOMEM;
         inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO);
-        if (!inode) {
-                ret = -ENOMEM;
+        if (!inode)
                 goto err;
-        }
+
         inode->i_ino = ++sel_last_ino;
         isec = (struct inode_security_struct *)inode->i_security;
         isec->sid = SECINITSID_DEVNULL;
@@ -1849,11 +1826,10 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
         d_add(dentry, inode);
         selinux_null = dentry;
 
+        ret = -ENOMEM;
         dentry = d_alloc_name(sb->s_root, "avc");
-        if (!dentry) {
-                ret = -ENOMEM;
+        if (!dentry)
                 goto err;
-        }
 
         ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
         if (ret)
@@ -1863,11 +1839,10 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
         if (ret)
                 goto err;
 
+        ret = -ENOMEM;
         dentry = d_alloc_name(sb->s_root, "initial_contexts");
-        if (!dentry) {
-                ret = -ENOMEM;
+        if (!dentry)
                 goto err;
-        }
 
         ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
         if (ret)
@@ -1877,11 +1852,10 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
         if (ret)
                 goto err;
 
+        ret = -ENOMEM;
         dentry = d_alloc_name(sb->s_root, "class");
-        if (!dentry) {
-                ret = -ENOMEM;
+        if (!dentry)
                 goto err;
-        }
 
         ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
         if (ret)
@@ -1889,11 +1863,10 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
 
         class_dir = dentry;
 
+        ret = -ENOMEM;
         dentry = d_alloc_name(sb->s_root, "policy_capabilities");
-        if (!dentry) {
-                ret = -ENOMEM;
+        if (!dentry)
                 goto err;
-        }
 
         ret = sel_make_dir(root_inode, dentry, &sel_last_ino);
         if (ret)
@@ -1901,12 +1874,11 @@ static int sel_fill_super(struct super_block *sb, void *data, int silent)
 
         policycap_dir = dentry;
 
-out:
-        return ret;
+        return 0;
 err:
         printk(KERN_ERR "SELinux: %s:  failed while creating inodes\n",
                 __func__);
-        goto out;
+        return ret;
 }
 
 static struct dentry *sel_mount(struct file_system_type *fs_type,
@@ -1930,14 +1902,16 @@ static int __init init_sel_fs(void)
         if (!selinux_enabled)
                 return 0;
         err = register_filesystem(&sel_fs_type);
-        if (!err) {
-                selinuxfs_mount = kern_mount(&sel_fs_type);
-                if (IS_ERR(selinuxfs_mount)) {
-                        printk(KERN_ERR "selinuxfs:  could not mount!\n");
-                        err = PTR_ERR(selinuxfs_mount);
-                        selinuxfs_mount = NULL;
-                }
+        if (err)
+                return err;
+
+        selinuxfs_mount = kern_mount(&sel_fs_type);
+        if (IS_ERR(selinuxfs_mount)) {
+                printk(KERN_ERR "selinuxfs:  could not mount!\n");
+                err = PTR_ERR(selinuxfs_mount);
+                selinuxfs_mount = NULL;
         }
+
         return err;
 }