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>Number: 60564
>Category: misc
>Synopsis: live image has legacy pty /dev nodes despite using ptyfs
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: misc-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Sun Aug 09 22:30:00 +0000 2026
>Originator: Taylor R Campbell
>Release: current, 11, 10, 9, ...
>Organization:
The NetBSD Livedation, Pty.
>Environment:
>Description:
Every image that uses common/bootimage/Makefile.bootimage has
legacy pty nodes unconditionally, even if it mounts ptyfs
anyway:
465 ${HOST_SH} ${WORKDIR}/dev/MAKEDEV -s all ipty | \
https://nxr.netbsd.org/xref/src/distrib/common/bootimage/Makefile.bootimage?r=1.50#465
This is used by the live image on various architectures, even
though they also mount ptyfs.
Perhaps it is reasonable to use legacy pty nodes in installer
images though I suspect it would be better to just mount ptyfs.
I seem to recall the legacy pty nodes have security issues
(though I forget what they are -- should document them in the
pty(4) man page) and cause trouble of various kinds.
>How-To-Repeat:
image inspection
>Fix:
1. Make a parameter for Makefile.bootimage for the set of
MAKEDEV targets.
2. Add the ipty target only where it is actually needed.
3. Make sure ttyp0 and ttyp1 don't exist in the live images
that mount ptyfs.