RHBA-2009:0481 - Bug Fix Advisory

Topic

An updated grep package that fixes various bugs is now available.

Description

Grep searches through textual input for lines matching a regular
expression.

This updated grep package includes fixes for the following bugs:

• while searching certain immense binary files in which the newline

character did not appear for large expanses (for hundreds of megabytes of
text, for instance), grep may have missed a subsequent match. Because the
grep utility is not intended to process arbitrarily-long files in this
manner, this updated version now exits with a "line too long" error message
and an appropriate error code under these conditions. (BZ#483073)

• when operating on particular multi-byte character sets (but not, notably,

UTF-8), grep could enter an infinite loop and become unresponsive. This has
been fixed in this updated package so that grep is once again able to
process these multi-byte character sets without hanging. (BZ#479151)

• certain output control option combinations could cause the grep tool to

segmentation fault. With this updated package, these combinations work as
expected and no longer cause a segmentation fault. (BZ#452127)

• the example attached to the "--label" option description was not

illustrative enough: as documented, the option actually had no effect. The
updated package contains an improved example that shows the "--label"
option's utility, both in the manual and info pages. (BZ#484366)

All users of grep are advised to upgrade to this updated package, which
resolves these issues.

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
http://kbase.redhat.com/faq/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 - 452127 - grep segfaults when using -m and -A
• BZ - 479151 - fgrep uses 100% of cpu when env var LC_ALL=ko_KR.eucKR
• BZ - 483073 - grep-mem-exhausted.patch introduces regressions
• BZ - 484366 - manual gives an incomplete example for --label

CVEs

(none)

References

(none)