From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A57971D5CC6 for ; Wed, 11 Dec 2024 15:46:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733931965; cv=none; b=r8Y1Tk2MnQ/hubGB/a4DkFMK9PtWR72LLgVDHj/qzIVUBmPYJmV7ZuBog1+wPiEN9/RPOyxMTB+L2ffMGfhYFJ6X/njWpuonH+mz//N53GyC1TvtEdXrLRdtklabVm+g+MdkurkUA+MHsox1ayopX9AcJEzhXozVplIkcPTF8YU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733931965; c=relaxed/simple; bh=6lGx5QexARWN3SzIAahwI8CDbjfI3RBnrClOPVKH2DE=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=XEn7DQUqNux3Ia2u7U05QiY4p3wliWJ3QvQaPohEClJjUtOWCGo7PJTxYkR8LYhKiwgRRvjK7ReEv7GWvcX4/k2yT71rRWpqZ/jQmAuHPxkW9YxoyTPc0H2/zhYU0d2q2yHx3Lbznk8zHy8VzPVh3h8htffcpl6MJtZakes9baM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=uRyMOFYj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="uRyMOFYj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 16018C4CED2; Wed, 11 Dec 2024 15:46:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733931965; bh=6lGx5QexARWN3SzIAahwI8CDbjfI3RBnrClOPVKH2DE=; h=Date:From:To:Cc:Subject:From; b=uRyMOFYj09K3He+yBr6hUnerBL4V5JN5UNlvhrbMb/W6wWsDPCEKbijTL4KLHTRyo IF6CizqAEq8ZbVjTkvqUgN6b6uTrmc+fNV8ce3MDVMR7RV2wmDwuBQWBwk7z1A96nj yPwtzcwhnDwb2l5s2wikHM2sp8cOOP9AhRxFLBp5rD0d++1li5wxGs0eK61j01PnM3 yFGICCtwCaX2wxvCWNU8vlf8Guo+bLrsbnQdZvSmrXTztf+Vj37+DkXTmJwXDrdHs3 AutXuAXzRK1v5kK28OYCJkEcUc977zGDziXkSMI+LAdLSHVBMSKSHOuaUuG/BJ/Fsn jtyQ9Idk+Jt1w== Date: Wed, 11 Dec 2024 15:46:03 +0000 From: Jaegeuk Kim To: Linus Torvalds Cc: Linux Kernel Mailing List , krisman@suse.de Subject: Unicode conversion issue Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi Linus/Gabriel, Once Android applied the below patch [1], some special characters started to be converted differently resulting in different length, so that f2fs cannot find the filename correctly which was created when the kernel didn't have [1]. There is one bug report in [2] where describes more details. In order to avoid this, could you please consider reverting [1] asap? Or, is there any other way to keep the conversion while addressing CVE? It's very hard for f2fs to distinguish two valid converted lengths before/after [1]. [1] 5c26d2f1d3f5 ("unicode: Don't special case ignorable code points") [2] https://bugzilla.kernel.org/show_bug.cgi?id=219586