ext4: return EFSBADCRC if a bad checksum error is found in ext4_find_entry()

Previously a bad directory block with a bad checksum is skipped; we
should be returning EFSBADCRC (aka EBADMSG).
Signed-off-by: NTheodore Ts'o <tytso@mit.edu>

fs/ext4/namei.c

@@ -1456,7 +1456,8 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
 			EXT4_ERROR_INODE(dir, "checksumming directory "
 					 "block %lu", (unsigned long)block);
 			brelse(bh);
-			goto next;
+			ret = ERR_PTR(-EFSBADCRC);
+			goto cleanup_and_exit;
 		}
 		set_buffer_verified(bh);
 		i = search_dirblock(bh, dir, &fname,