RHBA-2014:1604 - Bug Fix Advisory

Topic

Updated ltrace packages that fix two bugs are now available for Red Hat
Enterprise Linux 6.

Description

The ltrace utility is a debugging program that runs a specified command until
the command exits. While the command is executing, ltrace intercepts and records
both the dynamic library calls called by the executed process and the signals
received by the executed process. The ltrace utility can also intercept and
print system calls executed by the process.

This update fixes the following bugs:

• Previously, the ltrace utility did not support the Position Independent

Executables (PIE) binaries, which are linked similarly to shared libraries, and
processes. Consequently, addresses found in images of those binaries needed
additional adjustment for the actual address where the binary was loaded during
the process startup. With this update, the support for the PIE binaries and
processes has been added and ltrace now handles the additional processing for
the PIE binaries correctly. (BZ#868280)

• When copying internal structures after cloning a process, the ltrace utility

did not copy a string containing a path to an executable properly. This behavior
led to errors in heap management and could cause ltrace to terminate
unexpectedly. The underlying source code has been modified and ltrace now copies
memory when cloning traced processes correctly. (BZ#891607)

Users of ltrace 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.

This update is available via the Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

CVEs

(none)

References

(none)