diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index c2324d5fe4ac149a5672bad13134d4775c815100..320b2cb3d4d22eddf610d7a27d043eeef0437d5e 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 4a2a02c95bf94b98fc4534d870f3546a45442c8e..023a070f55f18fac29cfddafa08557085ad6b2fa 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 c04c7ccba9e3f140ed5243a6ccdcc58d6afcaa15..e7f894bdb4202359974088ba5c1f14585a43fc03 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 3c8663bea98ca3bf373f3ea83260b33d67548f3a..dfda12a073e1985fb28b798df2e9088a9a996be4 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 c438a8f83f26f7ad3412f5fd2f3af69e582ad02d..e0f0f098a523a8d1c3a41099ab76b411989a23a0 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))