Issued:
2010-01-19
Updated:
2010-01-19

RHBA-2010:0047 - strace bug fix update

Synopsis

strace bug fix update

Type/Severity

Bug Fix Advisory

Topic

An updated strace package that fixes a bug when tracing a program that blocks the SIGTRAP signal is now available.

Description

The strace program intercepts and records the system calls called and received by a running process. Strace can print a record of each system call, its arguments and its return value.

This updated strace package fixes the following bug:

  • the kernel does not send SIGTRAP notifications to strace after an execve system call finishes. Consequently, when "strace -f" was executed against a program that blocked the SIGTRAP signal and subsequently called execve, strace sent a "[preattached child 0 of 12166 in weird state!]" message to STD OUT and hung. With this update, strace now checks for this situation and re-synchronizes with system call notifications when necessary. Note: this problem only presents on Itanium-based systems (BZ#548363)

All strace users are advised to upgrade to this updated package, which resolves this issue.

Solution

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

This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.4i386
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support5.4ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support5.4s390x
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • strace-4.5.18-5.el5_4.1.src.rpm
  • strace-4.5.18-5.el5_4.1.ppc.rpm
  • strace64-4.5.18-5.el5_4.1.ppc64.rpm
  • strace-4.5.18-5.el5_4.1.i386.rpm
  • strace-4.5.18-5.el5_4.1.s390x.rpm
  • strace-4.5.18-5.el5_4.1.ia64.rpm
  • strace-4.5.18-5.el5_4.1.x86_64.rpm

Fixes

CVEs

(none)

References

(none)

Additional information