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forked from pool/util-linux
util-linux/Add-documentation-on-blacklisted-modules-to-mount-8-.patch
Stanislav Brabec 6295ab1cea Accepting request 677957 from home:mwilck:branches:Base:System
-  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
2019-03-01 20:19:58 +00:00

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