forked from pool/util-linux
Stanislav Brabec
6295ab1cea
- libmount: remove jffs2 and ubifs from blacklist (jsc#SLE-4085). - libmount: print a blacklist hint for "unknown filesystem type" (jsc#SLE-4085, fate#326832), and add documentation * add libmount-print-a-blacklist-hint-for-unknown-filesyst.patch * add Add-documentation-on-blacklisted-modules-to-mount-8-.patch OBS-URL: https://build.opensuse.org/request/show/677957 OBS-URL: https://build.opensuse.org/package/show/Base:System/util-linux?expand=0&rev=394
51 lines
1.6 KiB
Diff
51 lines
1.6 KiB
Diff
From 1ade50a36f23fc35abb465aa5b7cfc73b2476328 Mon Sep 17 00:00:00 2001
|
|
From: Martin Wilck <mwilck@suse.com>
|
|
Date: Fri, 1 Feb 2019 12:09:11 +0100
|
|
Subject: [PATCH] Add documentation on blacklisted modules to mount(8) man page
|
|
|
|
Signed-off-by: Martin Wilck <mwilck@suse.com>
|
|
---
|
|
sys-utils/mount.8 | 26 ++++++++++++++++++++++++++
|
|
1 file changed, 26 insertions(+)
|
|
|
|
diff --git a/sys-utils/mount.8 b/sys-utils/mount.8
|
|
index da0ac5b..c231e12 100644
|
|
--- a/sys-utils/mount.8
|
|
+++ b/sys-utils/mount.8
|
|
@@ -338,6 +338,32 @@ The
|
|
option is similar, with the restriction that the user must be
|
|
member of the group of the special file.
|
|
|
|
+.SS Blacklisted file systems
|
|
+In the Linux kernel, file system types are implemented as kernel
|
|
+modules. While many of these file systems are well maintained,
|
|
+some of the older and less frequently used ones are not. This
|
|
+poses a security risk, because maliciously crafted file system
|
|
+images might open security holes when mounted either automatically
|
|
+or by an inadvertent user. The
|
|
+.B mount
|
|
+command prints "unsupported file system type 'somefs'" in this case,
|
|
+because it can't distinguish between a really unsupported file system
|
|
+(kernel module non-existent) and a blacklisted file system.
|
|
+
|
|
+Users who need the blacklisted file systems and therefore want
|
|
+to override the blacklisting can either load the blacklisted module
|
|
+directly:
|
|
+.RS
|
|
+
|
|
+.br
|
|
+.BI "modprobe -v" " somefs"
|
|
+.br
|
|
+
|
|
+.RE
|
|
+or override the blacklist configuration by editing files under the
|
|
+.I /etc/modprobe.d
|
|
+directory.
|
|
+
|
|
.SS Bind mount operation
|
|
Remount part of the file hierarchy somewhere else. The call is:
|
|
|
|
--
|
|
2.19.2
|
|
|