From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:54415 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936005AbcJTOZB (ORCPT ); Thu, 20 Oct 2016 10:25:01 -0400 Subject: Patch "autofs: Fix automounts by using current_real_cred()->uid" has been added to the 4.8-stable tree To: ebiederm@xmission.com, gregkh@linuxfoundation.org, seth.forshee@canonical.com Cc: , From: Date: Thu, 20 Oct 2016 16:24:59 +0200 Message-ID: <1476973499249255@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 autofs: Fix automounts by using current_real_cred()->uid to the 4.8-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: autofs-fix-automounts-by-using-current_real_cred-uid.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 069d5ac9ae0d271903cc4607890616418118379a Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 30 Sep 2016 11:28:05 -0500 Subject: autofs: Fix automounts by using current_real_cred()->uid From: Eric W. Biederman commit 069d5ac9ae0d271903cc4607890616418118379a upstream. Seth Forshee reports that in 4.8-rcN some automounts are failing because the requesting the automount changed. The relevant call path is: follow_automount() ->d_automount autofs4_d_automount autofs4_mount_wait autofs4_wait In autofs4_wait wq_uid and wq_gid are set to current_uid() and current_gid respectively. With follow_automount now overriding creds uid that we export to userspace changes and that breaks existing setups. To remove the regression set wq_uid and wq_gid from current_real_cred()->uid and current_real_cred()->gid respectively. This restores the current behavior as current->real_cred is identical to current->cred except when override creds are used. Fixes: aeaa4a79ff6a ("fs: Call d_automount with the filesystems creds") Reported-by: Seth Forshee Tested-by: Seth Forshee Signed-off-by: "Eric W. Biederman" Signed-off-by: Greg Kroah-Hartman --- fs/autofs4/waitq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -431,8 +431,8 @@ int autofs4_wait(struct autofs_sb_info * memcpy(&wq->name, &qstr, sizeof(struct qstr)); wq->dev = autofs4_get_dev(sbi); wq->ino = autofs4_get_ino(sbi); - wq->uid = current_uid(); - wq->gid = current_gid(); + wq->uid = current_real_cred()->uid; + wq->gid = current_real_cred()->gid; wq->pid = pid; wq->tgid = tgid; wq->status = -EINTR; /* Status return if interrupted */ Patches currently in stable-queue which might be from ebiederm@xmission.com are queue-4.8/autofs-fix-automounts-by-using-current_real_cred-uid.patch