RHBA-2012:0271 - Bug Fix Advisory

Topic

An updated binutils package that fixes three bugs is now available for Red Hat
Enterprise Linux 5.

Description

Binutils is a collection of binary utilities for the manipulation of object code
in various object file formats.

This update fixes the following bugs:

• Prior to this update, got2 offset addends could, under certain circumstances,

be wrongly incorporated into the trampoline if code at a PLTREL24 relocation
with got2 offset addends referenced a symbol that was resolved locally instead
of going through the Procedure Linkage Table (PLT). As a result, the trampoline
transferred the code to the wrong target. With this update, the addend of the
relocation is, where necessary, cleared. Now, the computation of the
trampoline's target address is correct. (BZ#728404)

• Prior to this update, the dl debug state RT_CONSISTENT incorrectly occurred

before applying dynamic relocations. As a consequence, debugging tools could not
correctly monitor this call. This update adds systemtap-probes at a superset of
the locations where the state RT_CONSISTENT was called. (BZ#748927)

• Prior to this update, the linker did not allow the local-exec Thread-local

storage (TLS) model with -fPIC when creating an executable. As a consequence,
the local-exec TLS model did not work with executables compiled with
position-independent code (PIC) or position-independent executables (PIE) when
creating an executable. This update modifies the underlying code to only
disallow the local-exec TLS model when creating a shared library. (BZ#755872)

Users are advised to upgrade to this updated binutils package, which fixes 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/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 748927 - SystemTap affected by ".stapsdt.base.1"
• BZ - 755872 - -fpie + -pie does not appear to work with __thread variables

CVEs

(none)

References

(none)