diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index a4b7e4bc32d4..85baf1c62e65 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -232,6 +232,10 @@ static void ext4_write_inline_data(struct inode *inode, struct ext4_iloc *iloc,
 		return;
 
 	BUG_ON(!EXT4_I(inode)->i_inline_off);
+	if (pos + len > EXT4_I(inode)->i_inline_size)
+		ext4_warning(inode->i_sb, "inode #%lu: pos %llu, len %u, "
+			     "i_inline_size %u", inode->i_ino,
+			     pos, len, EXT4_I(inode)->i_inline_size);
 	BUG_ON(pos + len > EXT4_I(inode)->i_inline_size);
 
 	raw_inode = ext4_raw_inode(iloc);
@@ -687,6 +691,10 @@ int ext4_try_to_write_inline_data(struct address_space *mapping,
 	}
 
 	ret = ext4_prepare_inline_data(handle, inode, pos + len);
+	ext4_warning(inode->i_sb,
+		     "inode #%lu: pos %llu len %u "
+		     "prepare_inline_data returns %d",
+		     inode->i_ino, pos, len, ret);
 	if (ret && ret != -ENOSPC)
 		goto out;