From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:55730 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751041AbdEESCw (ORCPT ); Fri, 5 May 2017 14:02:52 -0400 Subject: Patch "ext4/fscrypto: avoid RCU lookup in d_revalidate" has been added to the 4.4-stable tree To: jaegeuk@kernel.org, ebiggers@google.com, gregkh@linuxfoundation.org, tytso@mit.edu, viro@zeniv.linux.org.uk Cc: , From: Date: Fri, 05 May 2017 11:02:43 -0700 Message-ID: <1494007363723@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 ext4/fscrypto: avoid RCU lookup in d_revalidate to the 4.4-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: ext4-fscrypto-avoid-rcu-lookup-in-d_revalidate.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 03a8bb0e53d9562276045bdfcf2b5de2e4cff5a1 Mon Sep 17 00:00:00 2001 From: Jaegeuk Kim Date: Tue, 12 Apr 2016 16:05:36 -0700 Subject: ext4/fscrypto: avoid RCU lookup in d_revalidate From: Jaegeuk Kim commit 03a8bb0e53d9562276045bdfcf2b5de2e4cff5a1 upstream. As Al pointed, d_revalidate should return RCU lookup before using d_inode. This was originally introduced by: commit 34286d666230 ("fs: rcu-walk aware d_revalidate method"). Reported-by: Al Viro Signed-off-by: Jaegeuk Kim Cc: Theodore Ts'o Signed-off-by: Eric Biggers Signed-off-by: Greg Kroah-Hartman --- fs/ext4/crypto.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/fs/ext4/crypto.c +++ b/fs/ext4/crypto.c @@ -34,6 +34,7 @@ #include #include #include +#include #include "ext4_extents.h" #include "xattr.h" @@ -481,6 +482,9 @@ static int ext4_d_revalidate(struct dent struct ext4_crypt_info *ci; int dir_has_key, cached_with_key; + if (flags & LOOKUP_RCU) + return -ECHILD; + dir = dget_parent(dentry); if (!ext4_encrypted_inode(d_inode(dir))) { dput(dir); Patches currently in stable-queue which might be from jaegeuk@kernel.org are queue-4.4/ext4-fscrypto-avoid-rcu-lookup-in-d_revalidate.patch