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Date:      Wed, 23 May 2018 04:04:53 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 228432] [PATCH] sysctl `KERN_PROC_CWD` should return `ENOMEM` when the output buffer isn't big enough
Message-ID:  <bug-228432-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D228432

            Bug ID: 228432
           Summary: [PATCH] sysctl `KERN_PROC_CWD` should return `ENOMEM`
                    when the output buffer isn't big enough
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: brennan@umanwizard.com

Created attachment 193626
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D193626&action=
=3Dedit
patch fixing the issue

`man 3 sysctl` states: "If the amount of data available is greater than the
size of the buffer supplied, the call supplies as much data as fits in the
buffer provided and returns with the error code ENOMEM."

This is not true in the case of `KERN_PROC_CWD`, in which case `sysctl` ret=
urns
0, indicating success.

--=20
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