From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:33122 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756445AbdAIIgP (ORCPT ); Mon, 9 Jan 2017 03:36:15 -0500 Subject: Patch "fscrypt: fix renaming and linking special files" has been added to the 4.9-stable tree To: ebiggers@google.com, gregkh@linuxfoundation.org, richard@nod.at, tytso@mit.edu Cc: , From: Date: Mon, 09 Jan 2017 09:36:22 +0100 Message-ID: <148395098273234@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled fscrypt: fix renaming and linking special files to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: fscrypt-fix-renaming-and-linking-special-files.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 42d97eb0ade31e1bc537d086842f5d6e766d9d51 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Mon, 19 Dec 2016 14:20:13 -0800 Subject: fscrypt: fix renaming and linking special files From: Eric Biggers commit 42d97eb0ade31e1bc537d086842f5d6e766d9d51 upstream. Attempting to link a device node, named pipe, or socket file into an encrypted directory through rename(2) or link(2) always failed with EPERM. This happened because fscrypt_has_permitted_context() saw that the file was unencrypted and forbid creating the link. This behavior was unexpected because such files are never encrypted; only regular files, directories, and symlinks can be encrypted. To fix this, make fscrypt_has_permitted_context() always return true on special files. This will be covered by a test in my encryption xfstests patchset. Fixes: 9bd8212f981e ("ext4 crypto: add encryption policy and password salt support") Signed-off-by: Eric Biggers Reviewed-by: Richard Weinberger Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/crypto/policy.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/fs/crypto/policy.c +++ b/fs/crypto/policy.c @@ -171,6 +171,11 @@ int fscrypt_has_permitted_context(struct BUG_ON(1); } + /* No restrictions on file types which are never encrypted */ + if (!S_ISREG(child->i_mode) && !S_ISDIR(child->i_mode) && + !S_ISLNK(child->i_mode)) + return 1; + /* no restrictions if the parent directory is not encrypted */ if (!parent->i_sb->s_cop->is_encrypted(parent)) return 1; Patches currently in stable-queue which might be from ebiggers@google.com are queue-4.9/fscrypt-fix-renaming-and-linking-special-files.patch