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-rw-r--r--fs/ubifs/ioctl.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index 0164bcc827f8..daf9f93e15de 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -28,6 +28,11 @@
#include <linux/mount.h>
#include "ubifs.h"
+/* Need to be kept consistent with checked flags in ioctl2ubifs() */
+#define UBIFS_SUPPORTED_IOCTL_FLAGS \
+ (FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
+ FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
+
/**
* ubifs_set_inode_flags - set VFS inode flags.
* @inode: VFS inode to set flags for
@@ -169,6 +174,9 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
if (get_user(flags, (int __user *) arg))
return -EFAULT;
+ if (flags & ~UBIFS_SUPPORTED_IOCTL_FLAGS)
+ return -EOPNOTSUPP;
+
if (!S_ISDIR(inode->i_mode))
flags &= ~FS_DIRSYNC_FL;