bin/90002: env spins chewing CPU in some circumstances
Daniel J. O'Connor
darius at dons.net.au
Tue Dec 6 00:00:24 GMT 2005
>Number: 90002
>Category: bin
>Synopsis: env spins chewing CPU in some circumstances
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Dec 06 00:00:18 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Daniel J. O'Connor
>Release: FreeBSD 6.0-RELEASE amd64
>Organization:
>Environment:
FreeBSD cain.gsoft.com.au 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Wed Nov 2 19:07:38 UTC 2005 root at rat.samsco.home:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
The env program has some regressions in 6.0 when used as a script interpreter. In some cases it will
spin in a tight loop consuming CPU.
>How-To-Repeat:
[cain 10:15] ~ >cat ./testscript
#!/usr/bin/env FOO=BAR /bin/sh
echo FOO in $FOO
In 6.0 amd64, and -current i386 it exhibits the failure above. In i386 5.4 it works. I believe it is a
problem with 6.0 onwards and not architecture specific but I don't have enough test machines to be
sure.
It appears to be going in a strange loop allocating and freeing memory as the size fluctuates
between 1.2Mb and 380kb.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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