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From: Ian Kent <raven@themaw.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: autofs mailing list <autofs@vger.kernel.org>,
	Ondrej Holy <oholy@redhat.com>,
	Colin Walters <walters@redhat.com>,
	Kernel Mailing List <linux-kernel@vger.kernel.org>,
	David Howells <dhowells@redhat.com>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: [PATCH 2/3] autofs - make disc device user accessible
Date: Tue, 08 Aug 2017 12:26:59 +0800
Message-ID: <150216641928.11652.7388977863125547969.stgit@pluto.themaw.net> (raw)
In-Reply-To: <150216641255.11652.4204561328197919771.stgit@pluto.themaw.net>

The autofs miscellanous device ioctls that shouldn't require
CAP_SYS_ADMIN need to be accessible to user space applications in
order to be able to get information about autofs mounts.

The module checks capabilities so the miscelaneous device should
be fine with broad permissions.

Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Colin Walters <walters@redhat.com>
Cc: Ondrej Holy <oholy@redhat.com>
---
 fs/autofs4/dev-ioctl.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index dd9f1bebb5a3..218a4ecc75cc 100644
--- a/fs/autofs4/dev-ioctl.c
+++ b/fs/autofs4/dev-ioctl.c
@@ -733,7 +733,8 @@ static const struct file_operations _dev_ioctl_fops = {
 static struct miscdevice _autofs_dev_ioctl_misc = {
 	.minor		= AUTOFS_MINOR,
 	.name		= AUTOFS_DEVICE_NAME,
-	.fops		= &_dev_ioctl_fops
+	.fops		= &_dev_ioctl_fops,
+	.mode           = 0644,
 };
 
 MODULE_ALIAS_MISCDEV(AUTOFS_MINOR);

  reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-08  4:26 [PATCH 1/3] autofs - fix AT_NO_AUTOMOUNT not being honored Ian Kent
2017-08-08  4:26 ` Ian Kent [this message]
2017-08-08  4:27 ` [PATCH 3/3] autofs - make dev ioctl version and ismountpoint user accessible Ian Kent
2017-08-08 13:11 ` [PATCH 1/3] autofs - fix AT_NO_AUTOMOUNT not being honored Colin Walters
2017-08-09  0:45   ` Ian Kent
2017-08-09  8:39 ` David Howells
2017-08-09  9:51   ` Ian Kent
2017-08-10  2:16     ` Ian Kent

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