selinux: explicitly number all selinuxfs inodes

Explicitly number all selinuxfs inodes to prevent a conflict between
inodes numbered using last_ino when created with new_inode() and those
labeled explicitly.

Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
Acked-by: Eric Paris <eparis@parisplace.org>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c
index e24235c59ddf..1a786db50bd9 100644
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
@@ -100,8 +100,11 @@ enum sel_inos {
         SEL_MEMBER,     /* compute polyinstantiation membership decision */
         SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */
         SEL_COMPAT_NET, /* whether to use old compat network packet controls */
+        SEL_INO_NEXT,   /* The next inode number to use */
 };
 
+static unsigned long sel_last_ino = SEL_INO_NEXT - 1;
+
 #define SEL_INITCON_INO_OFFSET  0x01000000
 #define SEL_INO_MASK            0x00ffffff
 
@@ -1237,6 +1240,7 @@ static int sel_make_avc_files(struct dentry *dir)
                         goto out;
                 }
                 inode->i_fop = files[i].ops;
+                inode->i_ino = ++sel_last_ino;
                 d_add(dentry, inode);
         }
 out:
@@ -1304,6 +1308,7 @@ static int sel_make_dir(struct inode *dir, struct dentry *dentry)
         }
         inode->i_op = &simple_dir_inode_operations;
         inode->i_fop = &simple_dir_operations;
+        inode->i_ino = ++sel_last_ino;
         /* directory inodes start off with i_nlink == 2 (for "." entry) */
         inc_nlink(inode);
         d_add(dentry, inode);
@@ -1366,6 +1371,7 @@ static int sel_fill_super(struct super_block * sb, void * data, int silent)
                 ret = -ENOMEM;
                 goto err;
         }
+        inode->i_ino = ++sel_last_ino;
         isec = (struct inode_security_struct*)inode->i_security;
         isec->sid = SECINITSID_DEVNULL;
         isec->sclass = SECCLASS_CHR_FILE;