1 files changed, 44 insertions, 29 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index eb5c307fcc9a..6ab22720c277 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -106,7 +106,7 @@ int selinux_enforcing;
 static int __init enforcing_setup(char *str)
 {
         unsigned long enforcing;
-        if (!strict_strtoul(str, 0, &enforcing))
+        if (!kstrtoul(str, 0, &enforcing))
                 selinux_enforcing = enforcing ? 1 : 0;
         return 1;
 }
@@ -119,7 +119,7 @@ int selinux_enabled = CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE;
 static int __init selinux_enabled_setup(char *str)
 {
         unsigned long enabled;
-        if (!strict_strtoul(str, 0, &enabled))
+        if (!kstrtoul(str, 0, &enabled))
                 selinux_enabled = enabled ? 1 : 0;
         return 1;
 }
@@ -668,7 +668,7 @@ static int selinux_set_mnt_opts(struct super_block *sb,
                 if (flags[i] == SBLABEL_MNT)
                         continue;
                 rc = security_context_to_sid(mount_options[i],
-                                             strlen(mount_options[i]), &sid);
+                                             strlen(mount_options[i]), &sid, GFP_KERNEL);
                 if (rc) {
                         printk(KERN_WARNING "SELinux: security_context_to_sid"
                                "(%s) failed for (dev %s, type %s) errno=%d\n",
@@ -1418,15 +1418,33 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
                 isec->sid = sbsec->sid;
 
                 if ((sbsec->flags & SE_SBPROC) && !S_ISLNK(inode->i_mode)) {
-                        if (opt_dentry) {
-                                isec->sclass = inode_mode_to_security_class(inode->i_mode);
-                                rc = selinux_proc_get_sid(opt_dentry,
-                                                          isec->sclass,
-                                                          &sid);
-                                if (rc)
-                                        goto out_unlock;
-                                isec->sid = sid;
-                        }
+                        /* We must have a dentry to determine the label on
+                         * procfs inodes */
+                        if (opt_dentry)
+                                /* Called from d_instantiate or
+                                 * d_splice_alias. */
+                                dentry = dget(opt_dentry);
+                        else
+                                /* Called from selinux_complete_init, try to
+                                 * find a dentry. */
+                                dentry = d_find_alias(inode);
+                        /*
+                         * This can be hit on boot when a file is accessed
+                         * before the policy is loaded.  When we load policy we
+                         * may find inodes that have no dentry on the
+                         * sbsec->isec_head list.  No reason to complain as
+                         * these will get fixed up the next time we go through
+                         * inode_doinit() with a dentry, before these inodes
+                         * could be used again by userspace.
+                         */
+                        if (!dentry)
+                                goto out_unlock;
+                        isec->sclass = inode_mode_to_security_class(inode->i_mode);
+                        rc = selinux_proc_get_sid(dentry, isec->sclass, &sid);
+                        dput(dentry);
+                        if (rc)
+                                goto out_unlock;
+                        isec->sid = sid;
                 }
                 break;
         }
@@ -2489,7 +2507,8 @@ static int selinux_sb_remount(struct super_block *sb, void *data)
                 if (flags[i] == SBLABEL_MNT)
                         continue;
                 len = strlen(mount_options[i]);
-                rc = security_context_to_sid(mount_options[i], len, &sid);
+                rc = security_context_to_sid(mount_options[i], len, &sid,
+                                             GFP_KERNEL);
                 if (rc) {
                         printk(KERN_WARNING "SELinux: security_context_to_sid"
                                "(%s) failed for (dev %s, type %s) errno=%d\n",
@@ -2893,7 +2912,7 @@ static int selinux_inode_setxattr(struct dentry *dentry, const char *name,
         if (rc)
                 return rc;
 
-        rc = security_context_to_sid(value, size, &newsid);
+        rc = security_context_to_sid(value, size, &newsid, GFP_KERNEL);
         if (rc == -EINVAL) {
                 if (!capable(CAP_MAC_ADMIN)) {
                         struct audit_buffer *ab;
@@ -3050,7 +3069,7 @@ static int selinux_inode_setsecurity(struct inode *inode, const char *name,
         if (!value || !size)
                 return -EACCES;
 
-        rc = security_context_to_sid((void *)value, size, &newsid);
+        rc = security_context_to_sid((void *)value, size, &newsid, GFP_KERNEL);
         if (rc)
                 return rc;
 
@@ -3204,24 +3223,20 @@ error:
 
 static int selinux_mmap_addr(unsigned long addr)
 {
-        int rc = 0;
-        u32 sid = current_sid();
+        int rc;
+
+        /* do DAC check on address space usage */
+        rc = cap_mmap_addr(addr);
+        if (rc)
+                return rc;
 
-        /*
-         * notice that we are intentionally putting the SELinux check before
-         * the secondary cap_file_mmap check.  This is such a likely attempt
-         * at bad behaviour/exploit that we always want to get the AVC, even
-         * if DAC would have also denied the operation.
-         */
         if (addr < CONFIG_LSM_MMAP_MIN_ADDR) {
+                u32 sid = current_sid();
                 rc = avc_has_perm(sid, sid, SECCLASS_MEMPROTECT,
                                   MEMPROTECT__MMAP_ZERO, NULL);
-                if (rc)
-                        return rc;
         }
 
-        /* do DAC check on address space usage */
-        return cap_mmap_addr(addr);
+        return rc;
 }
 
 static int selinux_mmap_file(struct file *file, unsigned long reqprot,
@@ -5529,7 +5544,7 @@ static int selinux_setprocattr(struct task_struct *p,
                         str[size-1] = 0;
                         size--;
                 }
-                error = security_context_to_sid(value, size, &sid);
+                error = security_context_to_sid(value, size, &sid, GFP_KERNEL);
                 if (error == -EINVAL && !strcmp(name, "fscreate")) {
                         if (!capable(CAP_MAC_ADMIN)) {
                                 struct audit_buffer *ab;
@@ -5638,7 +5653,7 @@ static int selinux_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
 
 static int selinux_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
 {
-        return security_context_to_sid(secdata, seclen, secid);
+        return security_context_to_sid(secdata, seclen, secid, GFP_KERNEL);
 }
 
 static void selinux_release_secctx(char *secdata, u32 seclen)