diff --git a/mm/shmem.c b/mm/shmem.c
index 9f70e02111c6a..a2801ba8ae2d1 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1728,6 +1728,9 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
 	pgoff_t start, index, end;
 	int error;
 
+	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+		return -EOPNOTSUPP;
+
 	mutex_lock(&inode->i_mutex);
 
 	if (mode & FALLOC_FL_PUNCH_HOLE) {