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List: busybox-cvs
Subject: [Bug 8961] New: Bash Compatible sub string of variable when evaluating negative value causes seg fau
From: bugzilla () busybox ! net
Date: 2016-05-26 16:20:23
Message-ID: bug-8961-161 () https ! bugs ! busybox ! net/
[Download RAW message or body]
https://bugs.busybox.net/show_bug.cgi?id=8961
Bug ID: 8961
Summary: Bash Compatible sub string of variable when evaluating
negative value causes seg fault
Product: Busybox
Version: 1.24.x
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: Other
Assignee: unassigned@busybox.net
Reporter: vapier@gentoo.org
CC: busybox-cvs@busybox.net
Target Milestone: ---
When referencing a sub-string of a variable, using a negative value stored
in another variable, the shell will seg-fault.
Steps to reproduce:
/ # s=abcdefg
/ # n=2
/ # echo ${s:$n}
cdefg
/ # n=-2
/ # echo ${s:$n}
Segmentation fault
Expected behavior:
/ # s=abcdefg
/ # n=2
/ # echo ${s:$n}
cdefg
/ # n=-2
/ # echo ${s:$n}
fg
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