Synopsis

strace bug fix and enhancement update

Type/Severity

Bug Fix Advisory

Topic

Updated strace packages that fix several bugs and add various enhancements are
now available for Red Hat Enterprise Linux 6.

Description

The strace utility intercepts and records the system calls that are made and
received by a running process and prints a record of each system call, its
arguments, and its return value to standard error output or a file. It is often
used for problem diagnoses, debugging, and for instructional purposes.

The strace packages have been upgraded to upstream version 4.8, which provides a
number of bug fixes and enhancements over the previous version. Among others:

• This update adds several new command-line options: "-y" to print file
  descriptor paths, "-P" to filter system calls based on the file descriptor
  paths, and "-I" to control how interactive strace is.
  
• A new command-line utility, strace-log-merge, has been added. This utility can
  be used to merge timestamped strace output into a single file.
  
• The strace utility now uses optimized interfaces to extract data from the
  traced process for better performance.
  
• The strace utility now provides improved support for decoding of arguments for
  various system calls. In addition, a number of new system calls are supported.
  

(BZ#919101, BZ#1056828)

This update also fixes the following bug:

• Previously, the strace utility incorrectly handled the return value from the
  shmat() system call. Consequently, the return value displayed was "?" instead of
  the address of the attached shared memory segment. This bug has been fixed, and
  strace now displays the correct return value for the shmat() system calls.
  (BZ#877193)
  

Users of strace are advised to upgrade to these updated packages, which fix
these bugs and add these enhancements.

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 6 x86_64
• Red Hat Enterprise Linux Server 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

Fixes

• BZ - 877193 - Strace has unknown return value for shmat syscall.
• BZ - 919101 - strace -f : straced process killed by SIGTRAP (caused by BZ#837183)
• BZ - 1056828 - strace -cf java causes Segmentation fault
• BZ - 1214041 - strace -f prevents forking on a KVM guest

CVEs

(none)

References

(none)

Red Hat Enterprise Linux Server 6

SRPM
strace-4.8-10.el6.src.rpm	SHA-256: b603331929774474f23924eae84bff57617e0734dfc1d0d6f25f1fa0b79bf601
x86_64
strace-4.8-10.el6.x86_64.rpm	SHA-256: 92d39efc5848286f185ba8bccb78df4d616c06b71ccc8cde18b348269b7e362b
strace-debuginfo-4.8-10.el6.x86_64.rpm	SHA-256: fb80f39861432cbe93e52eafc10804353a374e8e5b8eec84ede49842e34ba898
i386
strace-4.8-10.el6.i686.rpm	SHA-256: 80a1be5f1d4bce41dd3e83471ea4498166b88512d2db348f8a475b5fcb5b7aeb
strace-debuginfo-4.8-10.el6.i686.rpm	SHA-256: 1a844064d65068a280d6dab564c91dcb9ab5541a953ef10a360f0f279423d6a8

Red Hat Enterprise Linux Workstation 6

SRPM
strace-4.8-10.el6.src.rpm	SHA-256: b603331929774474f23924eae84bff57617e0734dfc1d0d6f25f1fa0b79bf601
x86_64
strace-4.8-10.el6.x86_64.rpm	SHA-256: 92d39efc5848286f185ba8bccb78df4d616c06b71ccc8cde18b348269b7e362b
strace-debuginfo-4.8-10.el6.x86_64.rpm	SHA-256: fb80f39861432cbe93e52eafc10804353a374e8e5b8eec84ede49842e34ba898
i386
strace-4.8-10.el6.i686.rpm	SHA-256: 80a1be5f1d4bce41dd3e83471ea4498166b88512d2db348f8a475b5fcb5b7aeb
strace-debuginfo-4.8-10.el6.i686.rpm	SHA-256: 1a844064d65068a280d6dab564c91dcb9ab5541a953ef10a360f0f279423d6a8

Red Hat Enterprise Linux Desktop 6

SRPM
strace-4.8-10.el6.src.rpm	SHA-256: b603331929774474f23924eae84bff57617e0734dfc1d0d6f25f1fa0b79bf601
x86_64
strace-4.8-10.el6.x86_64.rpm	SHA-256: 92d39efc5848286f185ba8bccb78df4d616c06b71ccc8cde18b348269b7e362b
strace-debuginfo-4.8-10.el6.x86_64.rpm	SHA-256: fb80f39861432cbe93e52eafc10804353a374e8e5b8eec84ede49842e34ba898
i386
strace-4.8-10.el6.i686.rpm	SHA-256: 80a1be5f1d4bce41dd3e83471ea4498166b88512d2db348f8a475b5fcb5b7aeb
strace-debuginfo-4.8-10.el6.i686.rpm	SHA-256: 1a844064d65068a280d6dab564c91dcb9ab5541a953ef10a360f0f279423d6a8

Red Hat Enterprise Linux for IBM z Systems 6

SRPM
strace-4.8-10.el6.src.rpm	SHA-256: b603331929774474f23924eae84bff57617e0734dfc1d0d6f25f1fa0b79bf601
s390x
strace-4.8-10.el6.s390x.rpm	SHA-256: 55605da793701259529b3401009dbea08bc19dc953e8a05036954b5c79380d9e
strace-debuginfo-4.8-10.el6.s390.rpm	SHA-256: ae5ece7a1d067dfd22f9fbc2b561c79fdf4de3790ac5bca3c70e362b8ceb7f3f
strace-debuginfo-4.8-10.el6.s390x.rpm	SHA-256: edfe2f96d2a9892ad2edfbea98f9099cf34072e4e02ba304385c9fde4f5b5abf
strace32-4.8-10.el6.s390.rpm	SHA-256: 741faf056513417c747cd755952f8f4d3c8bb3e1a3b0607566350afd89323e93

Red Hat Enterprise Linux for Power, big endian 6

SRPM
strace-4.8-10.el6.src.rpm	SHA-256: b603331929774474f23924eae84bff57617e0734dfc1d0d6f25f1fa0b79bf601
ppc64
strace-4.8-10.el6.ppc64.rpm	SHA-256: 60f40987669314a02ab2370410e9dbf4dd9ad27cae69fc9675dca2b653f35ad6
strace-debuginfo-4.8-10.el6.ppc.rpm	SHA-256: 5f870fecd7ee90bc260d4c4612a863ea9289489b741487d99985f577f63375f8
strace-debuginfo-4.8-10.el6.ppc64.rpm	SHA-256: 6276fa0871ec606a746e8a7d02e4cec4803e659946ee9a4481c44761a45f5026
strace32-4.8-10.el6.ppc.rpm	SHA-256: 933c2c9bc4f294391c2ec594cc113ceaa9ee706f86f3576a4b147c4b463a85a4

Red Hat Enterprise Linux for Scientific Computing 6

SRPM
strace-4.8-10.el6.src.rpm	SHA-256: b603331929774474f23924eae84bff57617e0734dfc1d0d6f25f1fa0b79bf601
x86_64
strace-4.8-10.el6.x86_64.rpm	SHA-256: 92d39efc5848286f185ba8bccb78df4d616c06b71ccc8cde18b348269b7e362b
strace-debuginfo-4.8-10.el6.x86_64.rpm	SHA-256: fb80f39861432cbe93e52eafc10804353a374e8e5b8eec84ede49842e34ba898

Red Hat Enterprise Linux Server from RHUI 6

SRPM
strace-4.8-10.el6.src.rpm	SHA-256: b603331929774474f23924eae84bff57617e0734dfc1d0d6f25f1fa0b79bf601
x86_64
strace-4.8-10.el6.x86_64.rpm	SHA-256: 92d39efc5848286f185ba8bccb78df4d616c06b71ccc8cde18b348269b7e362b
strace-debuginfo-4.8-10.el6.x86_64.rpm	SHA-256: fb80f39861432cbe93e52eafc10804353a374e8e5b8eec84ede49842e34ba898
i386
strace-4.8-10.el6.i686.rpm	SHA-256: 80a1be5f1d4bce41dd3e83471ea4498166b88512d2db348f8a475b5fcb5b7aeb
strace-debuginfo-4.8-10.el6.i686.rpm	SHA-256: 1a844064d65068a280d6dab564c91dcb9ab5541a953ef10a360f0f279423d6a8