5 files changed, 21 insertions, 0 deletions

diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index c2324d5fe4ac..320b2cb3d4d2 100644
--- a/fs/ext2/ioctl.c
+++ b/fs/ext2/ioctl.c
@@ -47,6 +47,11 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
                         flags &= ~EXT2_DIRSYNC_FL;
 
                 mutex_lock(&inode->i_mutex);
+                /* Is it quota file? Do not allow user to mess with it */
+                if (IS_NOQUOTA(inode)) {
+                        mutex_unlock(&inode->i_mutex);
+                        return -EPERM;
+                }
                 oldflags = ei->i_flags;
 
                 /*
diff --git a/fs/ext3/ioctl.c b/fs/ext3/ioctl.c
index 4a2a02c95bf9..023a070f55f1 100644
--- a/fs/ext3/ioctl.c
+++ b/fs/ext3/ioctl.c
@@ -51,6 +51,11 @@ int ext3_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
                         flags &= ~EXT3_DIRSYNC_FL;
 
                 mutex_lock(&inode->i_mutex);
+                /* Is it quota file? Do not allow user to mess with it */
+                if (IS_NOQUOTA(inode)) {
+                        mutex_unlock(&inode->i_mutex);
+                        return -EPERM;
+                }
                 oldflags = ei->i_flags;
 
                 /* The JOURNAL_DATA flag is modifiable only by root */
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index c04c7ccba9e3..e7f894bdb420 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -51,6 +51,11 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
                         flags &= ~EXT4_DIRSYNC_FL;
 
                 mutex_lock(&inode->i_mutex);
+                /* Is it quota file? Do not allow user to mess with it */
+                if (IS_NOQUOTA(inode)) {
+                        mutex_unlock(&inode->i_mutex);
+                        return -EPERM;
+                }
                 oldflags = ei->i_flags;
 
                 /* The JOURNAL_DATA flag is modifiable only by root */
diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
index 3c8663bea98c..dfda12a073e1 100644
--- a/fs/jfs/ioctl.c
+++ b/fs/jfs/ioctl.c
@@ -79,6 +79,9 @@ int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,
                 if (!S_ISDIR(inode->i_mode))
                         flags &= ~JFS_DIRSYNC_FL;
 
+                /* Is it quota file? Do not allow user to mess with it */
+                if (IS_NOQUOTA(inode))
+                        return -EPERM;
                 jfs_get_inode_flags(jfs_inode);
                 oldflags = jfs_inode->mode2;
 
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index c438a8f83f26..e0f0f098a523 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -57,6 +57,9 @@ int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
                         if (get_user(flags, (int __user *)arg))
                                 return -EFAULT;
 
+                        /* Is it quota file? Do not allow user to mess with it. */
+                        if (IS_NOQUOTA(inode))
+                                return -EPERM;
                         if (((flags ^ REISERFS_I(inode)->
                               i_attrs) & (REISERFS_IMMUTABLE_FL |
                                           REISERFS_APPEND_FL))