RHBA-2015:0525 - Bug Fix Advisory

Topic

Updated autofs packages that fix several bugs and add various enhancements are
now available for Red Hat Enterprise Linux 7.

Description

The autofs utility controls the operation of the automount daemon. The daemon
automatically mounts file systems when in use and unmounts them when they are
not busy.

This update fixes the following bugs:

• The am-utils package, which provides automatic mounting of maps in the amd

format, is no longer supported in Red Hat Enterprise Linux 7. However,
amd-formatted maps are still needed for example when using relative path key
matching (keys containing multiple path components) that may also use trailing
wildcard character for matching, or performing more complex actions after the
key is matched. This update adds a parser for amd-formatted maps to the autofs
utility. (BZ#1116184)

• The autofs utility did not properly check for entries that corresponded to

previously failed mount attempts, the so-called "negative entries".
Consequently, when the "autofs mount" command was specified with the "browse"
option, the autofs utility could create directories that did not correspond to
map entries within the corresponding automounter map. With this update, the
check for negative map entries has been fixed. (BZ#1094661)

• When checking the mount option string, the automount daemon did not take into

account the length of the string, which led to incorrect comparisons. As a
consequence, the mount probes did not include NFSv3 when "-v" was used, and
under some circumstances, the mounts were not created properly. The option
matching has been modified to account for option length, thus fixing this bug.
(BZ#1124389)

• The autofs utility did not apply mutual exclusion when using the

initialization and termination functions from the OpenLDAP library. As these
functions are not thread-safe, a double free error occurred and autofs
terminated unexpectedly. This bug has been fixed by adding a mutual exclusion
condition for the aforementioned OpenLDAP functions. (BZ#1135158, BZ#1135159)

• Past changes in autofs packages introduced a memory leak in the internal hosts

map implementation. With this update, the memory leak no longer occurs.
(BZ#1132236)

• The man page sections describing "Multiple Mounts" and "Replicated Server"

syntax was reported to be unclear. This change adds additional descriptive text
and fixes the syntax specification for "Multiple Mounts". (BZ#1066772)

• Previously, autofs packages contained an obsolete kernel requirement that

caused problems when installing autofs into a Docker container. The obsolete
requirement has been removed and autofs can now be installed into a Docker
container without complications. (BZ#1152862)

• The previous update of autofs packages used an incorrect length in the type

comparison for yp maps. Consequently the yp map type was not correctly matched
which caused the corresponding map to not be read. With this update, autofs has
been updated to use the correct length in the comparison. (BZ#1153414)

• The autofs(8) manual page has been updated to reflect systemctl usage.

(BZ#1099800)

Users of autofs are advised to upgrade to these updated packages, which fix
these bugs.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux Server from RHUI 7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64

Fixes

• BZ - 1094661 - autofs can ghost non-existent map entries given the right timing
• BZ - 1099800 - man page of /etc/init.d/autofs: /usr/share/man/man8/autofs.8.gz is not needed in RHEL-7;
• BZ - 1152862 - autofs shouldn't have kernel as a dependency
• BZ - 1153414 - autofs-5.0.5-109 with upgrade to RHEL 6.6 no longer recognizes +yp: in auto.master
• BZ - 1164957 - The default installed autofs.conf doesn't have default nfs protocol set to 4

CVEs

(none)

References

(none)