Bug 158506 - grep segfaults when all of color, context, match, ignorecase set
grep segfaults when all of color, context, match, ignorecase set
Product: Fedora
Classification: Fedora
Component: grep (Show other bugs)
All Linux
medium Severity medium
: ---
: ---
Assigned To: Tim Waugh
Mike McLean
: 158536 (view as bug list)
Depends On:
  Show dependency treegraph
Reported: 2005-05-23 00:20 EDT by Doug Maxey
Modified: 2007-11-30 17:11 EST (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-05-23 13:01:35 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
patch to test return from memchr() (729 bytes, patch)
2005-05-23 00:20 EDT, Doug Maxey
no flags Details | Diff

  None (edit)
Description Doug Maxey 2005-05-23 00:20:00 EDT
Description of problem:
When using the command 
grep --color=auto --ignore-case --before-context 1 --after-context=4 --max-count
a segfault is produced in for the _last_ match in search.c

Version-Release number of selected component (if applicable):

How reproducible:

Actual results:
grep segfaults.

Expected results:
colorized context printed up to match times.

Additional info:
The faulting function is src/search.c::EGexecute::memchr().  The starting
address "beg" is passed as 1.  This was caused by the NULL return from the
previous call to memchr() and the loop continues.
Comment 1 Doug Maxey 2005-05-23 00:20:00 EDT
Created attachment 114697 [details]
patch to test return from memchr()
Comment 2 Tim Waugh 2005-05-23 08:38:52 EDT

Complete test case:

(echo foo ; echo foo) | \
  grep --color=auto --ignore-case --before-context=1 \
       --after-context=4 --max-count=1 foo
Comment 3 Doug Maxey 2005-05-23 09:13:57 EDT
*** Bug 158536 has been marked as a duplicate of this bug. ***
Comment 4 Tim Waugh 2005-05-23 13:01:35 EDT
Submitted upstream, as this check is missing in unpatched 2.5.1a.


Note You need to log in before you can comment on or make changes to this bug.