diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 79d18d5c1fae359e90d5d546d4bf3c7a900e573f..3d143be428959153872146e4c4bba4278fec2da5 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -384,13 +384,21 @@ static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
 		goto out;
 
 	f2fs_wait_on_page_writeback(page, DATA);
-	zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+	zero_user_segment(page, MAX_INLINE_DATA, PAGE_CACHE_SIZE);
 
 	dentry_blk = kmap_atomic(page);
 
 	/* copy data from inline dentry block to new dentry block */
 	memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
 					INLINE_DENTRY_BITMAP_SIZE);
+	memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
+			SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
+	/*
+	 * we do not need to zero out remainder part of dentry and filename
+	 * field, since we have used bitmap for marking the usage status of
+	 * them, besides, we can also ignore copying/zeroing reserved space
+	 * of dentry block, because them haven't been used so far.
+	 */
 	memcpy(dentry_blk->dentry, inline_dentry->dentry,
 			sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
 	memcpy(dentry_blk->filename, inline_dentry->filename,