>Number: 189845
>Category: misc
>Synopsis: UnNecessary Copy of Error Buffer in _kvm_open
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu May 15 22:50:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator: Myron Walker
>Release:
>Organization:
EMC
>Environment:
mwwsoftcluster0# uname -a
FreeBSD mwwsoftcluster0 11.0-CURRENT FreeBSD 11.0-CURRENT #0: Mon May 5
10:30:09 PDT 2014
[email protected]:/build/mnt/obj/build/mnt/src/sys/IQ.amd64.debug
amd64
>Description:
_kvm_open in libkvm always returns 0 on a failure. So writing a message to kd
is pointless because it is immediately passed to kvm_close() and the memory is
freed. Se the code snippet below from _kvm_open.
/*
* Copy out the error if doing sane error semantics.
*/
if (errout != 0)
strlcpy(errout, kd->errbuf, _POSIX2_LINE_MAX);
(void)kvm_close(kd);
return (0);
>How-To-Repeat:
>Fix:
All error message code can be removed from _kvm_open because none of it is used
anyway.
>Release-Note:
>Audit-Trail:
>Unformatted:
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