Forbid user to change file flags on quota files

[powerpc.git] / fs / ext2 / ioctl.c

diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index c2324d5..320b2cb 100644 (file)
--- 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;
 
                /*