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bug#15472: segmentation fault if input line is too long
From: |
Holger Then |
Subject: |
bug#15472: segmentation fault if input line is too long |
Date: |
Thu, 26 Sep 2013 14:21:54 +0200 (CEST) |
User-agent: |
Alpine 2.00 (DEB 1167 2008-08-23) |
If grep searches through a line that is longer than
INT_MAX (= 2147483647) characters, then grep causes
a segmentation fault.
Interestingly this bug does not occur with fgrep or
with grep -F
Kind regards,
Holger
$ wc grep_bug.txt
1 12200610 3281667946 grep_bug.txt
$ fgrep -e 1 grep_bug.txt | wc
1 12200610 3281667946
$ grep -Fe 1 grep_bug.txt | wc
1 12200610 3281667946
$ grep -e 1 grep_bug.txt | wc
0 0 0
$ grep -e 1 grep_bug.txt
Segmentation fault
$ tail -c 2147483647 grep_bug.txt | grep -e 1 | wc
1 8385663 2147483647
$ tail -c 2147483648 grep_bug.txt | grep -e 1 | wc
0 0 0
$ tail -c 2147483648 grep_bug.txt | grep -e 1
Segmentation fault
$ uname
-a
Linux c-0-0.local 2.6.32-358.11.1.el6.x86_64 #1 SMP Wed Jun 12 03:34:52
UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
$ grep --version
GNU grep 2.6.3
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
- bug#15472: segmentation fault if input line is too long,
Holger Then <=