https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=238883
Bug ID: 238883
Summary: Fatal double fault using nullfs+unionfs to build
www/node port (repeatable)
Product: Base System
Version: 12.0-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 205420
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=205420&action=edit
/var/crash/core.txt.4 file
Repeatably able to panic kernel while building www/node ports while using
nullfs and unionfs layered mounts for /usr/ports directory.
To trigger, setup mounts as:
/export/ports on /usr/ports (nullfs, local, read-only)
<above>:/usr/src/local.ports on /usr/ports (unionfs, local)
The /export/ports directory contains a master copy of the ports tree (ufs or
zfs doesn't matter - haven't tried nfs).
Then build www/node port:
root@krash:~ # cd /usr/ports/www/node
root@krash:/usr/ports/www/node # make
===> Building for node-12.4.0
.
.
.
Wait for panic (may take awhile into build). After panic/reboot, restarting
build panics again, almost immediately.
I was able to recreate crash in a fresh virtualbox install. The .vdi file for
that VM (in a quick to re-panic state) is available upon request (7.3GB
uncompressed).
/var/crash/core.txt file attached. vmcore file available (12MB compressed,
unattached due to size).
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